Tag Archives: Patient-reported outcomes
Evaluating the Impact of Anatomical Restoration of Hip Offset and Leg Length on One Year THR Outcomes
Vol 10 | Issue 2 | July-December 2024 | page: 44-47 | Pavan Patil, Rajeev Joshi, Sahil Sanghavi, Mahavir Dugad, Darshan Sonawane, Ashok Shyam, Parag Sancheti
https://doi.org/10.13107/jmt.2024.v10.i02.252
Author: Pavan Patil [1], Rajeev Joshi [1], Sahil Sanghavi [1], Mahavir Dugad [1], Darshan Sonawane [1], Ashok Shyam [1], Parag Sancheti [1]
[1] Department of Orthopaedics, Sancheti Institute of Orthopaedics and Rehabilitation, Pune, Maharashtra, India.
Address of Correspondence
Dr. Pavan Patil,
Department of Orthopaedics, Sancheti Institute of Orthopaedics and Rehabilitation, Pune, Maharashtra, India.
E-mail: drpavan010@gmail.com
Abstract
Background: Restoring femoral offset and limb length is essential for pain relief, stable gait and patient satisfaction after primary total hip replacement. Small deviations can alter abductor mechanics and affect function.
Methods: We prospectively studied 150 patients undergoing primary total hip replacement at a single centre from October 2019 to December 2021. Preoperative templating used standardized AP pelvic radiographs. Leg-length discrepancy was measured by the Woolson inter-teardrop method and global offset was calculated from acetabular and femoral measurements. Clinical outcomes were recorded before surgery and at postoperative intervals. Data were analysed using appropriate statistical tests for repeated measures.
Results: Most patients achieved postoperative limb-length and global-offset differences within five millimeters of the contralateral hip. Pain scores fell and functional scores rose consistently over the first postoperative year. Radiographic review showed stable components and a low complication rate.
Conclusion: Careful radiographic templating combined with attentive intraoperative technique can reliably restore offset and limb length within clinically acceptable limits in routine primary total hip replacement. This reconstruction is therefore associated with meaningful early gains in pain relief, mobility and quality of life; longer follow-up will clarify effects on implant survivorship.
Keywords: Total hip replacement, Femoral offset, Leg-length discrepancy, Templating, Patient-reported outcomes, Radiographic measurement
Introduction:
Total hip replacement is one of orthopedics’ most successful procedures and has transformed the lives of many patients with end-stage hip disease. To achieve predictable relief of pain and recovery of function, surgeons must do more than insert well-fixed implants — they must also restore the hip’s native geometry so that muscles and soft tissues work efficiently. Restoring femoral offset and the correct limb length are central to rebuilding a balanced hip: femoral offset determines the abductor lever arm and thus affects muscle strength and joint reaction forces, while leg-length inequality can cause limp, back pain and dissatisfaction if not corrected. [1–5]
Small changes in offset or length can influence abductor tension, gait mechanics and patient perception. Decreasing offset tends to shorten the abductor lever arm and can reduce muscular efficiency; increasing offset beyond what is necessary may over-tension soft tissues and cause discomfort. Likewise, even modest leg-length differences can be noticeable to patients, and larger discrepancies frequently lead to symptomatic complaints. Preoperative templating on standardized radiographs and careful intraoperative assessment are practical tools to reduce these risks in routine practice. This study used those methods to examine whether restoration of offset and limb length correlates with better patient-reported outcomes and to evaluate the reliability of plain radiographic measurement in a clinical setting. [1–5]
Review of literature
Earlier biomechanical and clinical work has repeatedly highlighted the importance of femoral offset and limb length in hip arthroplasty. Several studies showed that changes in offset alter abductor mechanics and can translate into measurable differences in gait and muscle strength. Restoration of offset has been associated with improved abductor leverage and, in some series, lower rates of component-related problems. [6–9]
Radiographic templating on AP pelvis films is the standard approach in most centres because it is accessible and practical, though it has recognized limitations: plain radiographs can underestimate true three-dimensional offset when compared with CT and are sensitive to pelvic rotation and magnification. Where available, 3-D planning provides greater accuracy, but for routine primary cases standardized radiography combined with careful technique offers a pragmatic balance of accuracy and convenience. [6–10]
Clinical thresholds vary between studies: some reports suggest that length differences up to about 10–20 mm may be tolerated by many patients, while others note that discrepancies above roughly 5–10 mm are more likely to affect gait symmetry or satisfaction. Gait-analysis studies indicate that combined deviations of length and offset correlate with altered kinematics; however, the effect on patient-reported outcome measures is often modest when deviations are small. Taken together, the literature supports aiming to restore offset and limb length as closely as practical while recognizing that small deviations within accepted limits frequently have limited clinical impact. [11–13]
Materials and Methods
This single-centre prospective study included 150 consecutive patients who underwent primary total hip replacement from October 2019 to December 2021. Exclusion criteria were congenital hip deformity, bilateral symptomatic disease at presentation, ankylosed hips and arthroplasty for acute trauma. Baseline demographic data and preoperative scores (Harris Hip Score, WOMAC, Oxford Hip Score, VAS and SF-36) were recorded.
Preoperative templating was performed on standardized AP pelvic radiographs. Leg length was measured by the inter-teardrop to lesser trochanter distance (Woolson method) and global offset as the sum of acetabular and femoral offsets on the AP film. To reduce radiographic error we used consistent patient positioning and magnification markers. Surgeries were performed predominantly via a posterolateral approach with templated osteotomy and trial reductions to confirm stability and soft-tissue balance. Modular head/neck options were used when intraoperative adjustments were needed.
Postoperative radiographs and clinical evaluations were performed at 6 weeks, 6 months and 12 months. Radiographic assessment included component position and signs of loosening or osteolysis. Continuous variables are presented as medians (IQR) and categorical data as counts (percentages). Repeated measures were analysed with linear mixed-effects models to account for within-patient correlations over time.
Results
The results reflect a large, generally healthy cohort of 151 patients (median age 51 years, IQR 39–60; 68% male). Median hospital stay was 5 days; median height 160 cm, weight 67 kg and BMI 25.7. Comorbidities were present in 58% (hypertension 32%, diabetes 13%, hypothyroid 7%, ischemic heart disease 5%). Radiographically, median global offset on the operated side was 7.24 cm (IQR 6.95–7.68) versus 7.24 cm (IQR 6.83–7.93) on the contralateral side (p = 0.52), while median leg-length measured 4.51 cm (IQR 4.06–4.99) operated versus 4.55 cm (IQR 3.90–4.89) contralateral (p < 0.001), indicating only small, clinically acceptable differences for most patients. Patient-reported outcomes improved markedly from baseline to 12 months: Harris Hip Score median 34 → 84, WOMAC 62 → 12, Oxford Hip Score 15 → 42, VAS pain 8 → 1, and SF-36 physical function 27 → 80 (all trends p < 0.0001). At one year median pain was low (VAS 1, IQR 1–2) and quality-of-life domains rose substantially. Early complications were uncommon: there were no cups with progressive migration at final review and only a few osteolytic lesions. Patients with offset or length differences within small thresholds (approximately ≤5 mm) experienced functional gains comparable to the whole cohort; larger discrepancies were rare and therefore made subgroup analysis limited.
Discussion
This series confirms that careful preoperative templating and attentive intraoperative technique can restore hip geometry — offset and limb length — within clinically acceptable margins for most patients undergoing primary THR. The findings echo prior biomechanical and clinical studies that link accurate offset reconstruction to improved abductor mechanics and suggest that restoring anatomy supports better objective and subjective outcomes. [14–16]
The literature describes a range of acceptable thresholds for offset and length discrepancies. While some degree of variation may be tolerated, deviations above commonly cited thresholds are more likely to alter gait kinematics and provoke symptoms. Where offset cannot be restored by a standard implant configuration, modular components or high-offset stems provide practical intraoperative options to fine-tune reconstruction. Radiographic templating on AP films remains a pragmatic method for routine cases; although CT-based planning is more precise, it is not necessary for every primary THR and is best reserved for complex anatomy or dysplastic hips. [16–18]
Several larger cohort and systematic reviews report similar conclusions: small deviations from native offset or limb length often have little effect on PROMs, but under-correction of offset and larger leg-length inequality are associated with worse functional measures and gait abnormalities in some studies. Surgeons should therefore aim for accurate restoration while recognizing that small residual differences are common and frequently clinically acceptable. [19–20]
Conclusion
In this cohort of 150 primary THR patients, restoration of limb length and global offset to within small, clinically acceptable margins was achieved in the majority. These patients showed consistent improvement in pain, function and health-related quality of life at one year. Standardized radiographic templating and intraoperative verification provide an effective, pragmatic approach to biomechanical reconstruction in routine primary THR. Three-dimensional planning remains valuable in selected complex cases.
References
1. Learmonth ID, Young C, Rorabeck C. The operation of the century: total hip replacement. Lancet. 2007; 370:1508–1519.
2. Bjordal F, Bjorgul K. The role of femoral offset and abductor lever arm in total hip arthroplasty. J Orthop Traumatol. 2015; 16(4):325–330.
3. Parry MC, Povey J, Blom AW, Whitehouse MR. Comparison of acetabular bone resection, offset, leg length and postoperative function between hip resurfacing arthroplasty and total hip arthroplasty. J Arthroplast. 2015; 30(10):1799–1803.
4. Hassani H, Cherix S, Ek ET, Rudiger HA. Comparisons of preoperative three-dimensional planning and surgical reconstruction in primary cementless total hip arthroplasty. J Arthroplast. 2014; 29(6):1273–1277.
5. Asayama I, Chamnongkich S, Simpson KJ, Kinsey TL, Mahoney OM. Reconstructed hip joint position and abductor muscle strength after total hip arthroplasty. J Arthroplast. 2005; 20(4):414–420.
6. Cassidy KA, Noticewala MS, Macaulay W, Lee JH, Geller JA. Effect of femoral offset on pain and function after total hip arthroplasty. J Arthroplast. 2012; 27(10):1863–1869.
7. Mahmood SS, Mukka SS, Crnalic S, Wretenberg P, Sayed-Noor AS. Association between changes in global femoral offset after total hip arthroplasty and function, quality of life, and abductor muscle strength: a prospective cohort study. Acta Orthop. 2016; 87(1):36–41.
8. Spalding TJ. Effect of femoral offset on motion and abductor muscle strength after total hip arthroplasty. J Bone Joint Surg Br. 1996; 78:997–998.
9. Lecerf G, Fessy MH, Philippot R, Massin P, Giraud F, Flecher X, et al. Femoral offset: anatomical concept, definition, assessment, implications for preoperative templating and hip arthroplasty. Orthop Traumatol Surg Res. 2009; 95(3):210–219.
10. Benedetti MG, Catani F, Benedetti E, Berti L, Di Gioia A, Giannini S. To what extent does leg length discrepancy impair motor activity in patients after total hip arthroplasty? Int Orthop. 2010; 34(8):1115–1121.
11. Plaass C, Clauss M, Ochsner PE, Ilchmann T. Influence of leg length discrepancy on clinical results after total hip arthroplasty—A prospective clinical trial. Hip Int. 2011; 21(4):441–449.
12. Desai AS, Dramis A, Board TN. Leg length discrepancy after total hip arthroplasty: a review of literature. Curr Rev Musculoskelet Med. 2013; 6(4):336–341.
13. Sariali E, Klouche S, Mouttet A, Pascal-Moussellard H. The effect of femoral offset modification on gait after total hip arthroplasty. Acta Orthop. 2014; 85(2):123–127.
14. Zhang Y, He W, and Cheng T, Zhang X. Total hip arthroplasty: leg length discrepancy affects functional outcomes and patient’s gait. Cell Biochem Biophys. 2015; 72(1):215–219.
15. Li J, McWilliams AB, Jin Z, Fisher J, Stone MH, Redmond AC, Stewart TD. Unilateral total hip replacement patients with symptomatic leg length inequality have abnormal hip biomechanics during walking. Clin Biomech. 2015; 30(5):513–519.
16. Renkawitz T, Weber T, Dullien S, Woerner M, Dendorfer S, Grifka J, Weber M. Leg length and offset differences above 5 mm after total hip arthroplasty are associated with altered gait kinematics. Gait Posture. 2016; 49:196–201.
17. Flecher X, Ollivier M, Argenson JN. Lower limb length and offset in total hip arthroplasty. Orthop Traumatol Surg Res. 2016; 102(1 Suppl):S9–S20.
18. Bolink SA, Lenguerrand E, Brunton LR, Hinds N, Wylde V, Heyligers IC, et al. The association of leg length and offset reconstruction after total hip arthroplasty with clinical outcomes. Clin Biomech. 2019; 68:89–95.
19. Shapira J, Chen SL, Rosinsky PJ, Maldonado DR, Meghpara M, Lall AC, Domb BG. The effect of postoperative femoral offset on outcomes after hip arthroplasty: A systematic review. J Orthop. 2020; 22:5–11.
20. Hassani H, Cherix S, Ek ET, Rudiger HA. Comparisons of preoperative three-dimensional planning and surgical reconstruction in primary cementless total hip arthroplasty. J Arthroplast. 2014; 29(6):1273–1277.
| How to Cite this Article: Patil P, Joshi R, Sanghavi S, Dugad M, Sonawane D, Shyam A, Sancheti P. Evaluating the Impact of Anatomical Restoration of Hip Offset and Leg Length on One-Year THR Outcomes ournal of Medical Journal Medical Thesis. 2024 July-December; 10(2): 44-47. |
Institute Where Research was Conducted: Department of Orthopaedics, Sancheti Institute of Orthopaedics and Rehabilitation, Shivajinagar, Pune, Maharashtra, India.
India.
University Affiliation: Maharashtra University Of Health Sciences (MUHS), Nashik,
Maharashtra, India
Year of Acceptance of Thesis: 2019
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Clinical Hypothesis: Does Achieving Combined ±5 mm Restoration Enhance Abductor Strength and Reduce Limp after THA?
Vol 10 | Issue 2 | July-December 2024 | page: 36-39 | Pavan Patil, Rajeev Joshi, Sahil Sanghavi, Mahavir Dugad, Darshan Sonawane, Ashok Shyam, Parag Sancheti
https://doi.org/10.13107/jmt.2024.v10.i02.248
Author: Pavan Patil [1], Rajeev Joshi [1], Sahil Sanghavi [1], Mahavir Dugad [1], Darshan Sonawane [1], Ashok Shyam [1], Parag Sancheti [1]
[1] Department of Orthopaedics, Sancheti Institute of Orthopaedics and
Rehabilitation, Pune, Maharashtra, India.
Address of Correspondence
Dr. Pavan Patil,
Department of Orthopaedics, Sancheti Institute of Orthopaedics and
Rehabilitation, Pune, Maharashtra, India.
E-mail: drpavan010@gmail.com
Abstract
Background: Total hip replacement (THR) aims to relieve pain and restore function. Restoring leg length and femoral/acetabular offset is important for abductor mechanics and gait symmetry. Small deviations can cause limp, back pain, dissatisfaction, and may affect abductor strength and gait despite good pain relief. The cohort included consecutive patients with 12-month follow-up and combined clinical and instrumented gait assessments for analysis. This study analyzed patients undergoing primary THR, measuring postoperative leg length discrepancy (LLD) and global offset on standardized radiographs and comparing these with patient-reported outcome measures (Harris Hip Score, WOMAC, Oxford Hip Score, SF-36, VAS), abductor strength and gait parameters up to one year.
Hypothesis: Restoring both leg length and global offset to within ±5 mm of the contralateral hip leads to better objective gait performance and abductor strength at one year compared with greater discrepancies. While PROMs improve broadly after THR, it is expected that patients with well-restored geometry will show superior walking speed, symmetry and muscle power, and possibly modestly better function-related PROM subscales.
Clinical importance: For surgeons, combined restoration of length and offset is a practical, modifiable goal that supports a more natural gait and stronger abductor function. Achieving geometry within ±5 mm reduces the risk of persistent limp, perceived limb difference and related back pain. When patients report unexplained limp or dissatisfaction after otherwise successful THR, a focused assessment of LLD and offset can identify correctable mechanical causes and guide targeted interventions.
Future research: Larger multicentre studies using precise 3D imaging and standardized gait analysis are needed to determine whether small early biomechanical deficits lead to increased wear or revision in the long term. Development of PROM subscales sensitive to gait asymmetry and wider adoption of intraoperative navigation or rapid templating tools may improve reproducibility of reconstructing hip geometry and patient outcomes.
Keywords: Total hip replacement, Leg length discrepancy, Femoral offset, Gait, Abductor strength, Patient-reported outcomes
Background
Total hip replacement (THR) has transformed the lives of many patients with painful, disabling hip arthritis. The operation reliably reduces pain, restores mobility and improves quality of life. However, success after THR is not simply relief of pain — restoring the hip’s normal mechanics matters too. Two technical details that surgeons try to restore are leg length and femoral/acetabular offset. Small errors in these parameters can change muscle mechanics, alter gait, and leave patients with limp, back pain or dissatisfaction despite a well-fixed implant.
Femoral offset is the horizontal distance from the center of the femoral head to the femoral axis. It controls the abductor muscles’ lever arm: reduce the offset and the abductors lose mechanical advantage and must work harder to stabilize the pelvis; increase it too much and the soft tissues are overtensioned and joint forces rise. This biomechanical balance is directly tied to walking ability and to the feeling of a “normal” hip after surgery [1–4]. Multiple clinical studies have linked offset loss (particularly reductions >5 mm) with weaker abductor strength and worse functional test results [5–8].
Leg length discrepancy (LLD) after THR is another frequent cause of patient concern. Perceived or real limb length differences may produce a limp, low-back pain, or a sense that the leg “feels” different; substantial overlengthening can even cause nerve stretch injuries. Careful templating, technique and intraoperative checks reduce the risk, but plain radiographs used for measurement can be affected by pelvic tilt or rotation, which complicates exact measurement [9–13]. Many surgeons use a pragmatic tolerance — ±5 mm for length and offset — reasoning that differences within this window are unlikely to be clinically meaningful for most patients [14,15]. But that rule of thumb is not absolute: gait lab studies and focused strength testing often detect changes even when patient-reported outcome measures (PROMs) look acceptable. This suggests PROMs can be insensitive to subtle biomechanical problems that still matter to function [16–18].
The literature shows mixed findings. Large registry and some retrospective studies find weak or inconsistent associations between radiographic measures and PROMs, possibly because PROMs emphasize pain relief and broad activities rather than fine gait symmetry. By contrast, detailed gait analyses and dynamometry frequently show biomechanical deficits tied to offset or length errors — deficits that can persist even after pain disappears [19–21]. The attached thesis explores these tensions by prospectively measuring postoperative LLD and global offset on standardized radiographs and comparing them with PROMs (Harris Hip Score, WOMAC, Oxford Hip Score, SF-36, VAS), abductor strength testing and gait parameters up to 12 months after primary THR. The study asks whether achieving combined restoration of length and offset to within clinician-accepted tolerances corresponds with better objective function as well as with better patient-reported outcomes [22–25].
Hypothesis
Primary hypothesis (null): Restoration of limb length and global offset after primary total hip replacement does not influence clinical outcomes measured by validated PROMs and objective functional tests at one year.
Alternative (working) hypotheses:
1. Patients whose combined postoperative leg length and global offset are within ±5 mm of the contralateral native hip will demonstrate superior objective gait performance (higher normalized walking speed, more symmetric stance phases and improved hip range of motion during gait) at 12 months compared with patients with >5 mm discrepancy.
2. Restoration of femoral/ global offset — and specifically avoiding a reduction of offset >5 mm — will associate with greater abductor muscle strength and improved functional scores.
3. The effects of LLD and offset are additive: combined deviations beyond 5 mm will produce more pronounced gait asymmetry and symptomatic complaints, even in the setting of overall pain relief.
Rationale: The abductor mechanism stabilizes the pelvis during single-leg stance. If the offset is reduced, the abductor lever arm shortens and the muscles must generate more force to maintain the same moment, which can produce fatigue, weakness and an observable Trendelenburg sign or limp [1–4]. Conversely, excessive offset increases soft-tissue tension and joint reaction forces, potentially causing pain or accelerated wear [5,6]. Leg length differences change limb loading and timing of gait phases — even small asymmetries can alter step length and ground reaction forces and are readily observed on instrumented gait analysis [7,8].
PROMs such as the Harris Hip Score or WOMAC measure pain, stiffness and broad function, and they usually improve markedly after THR. But these tools may not detect fine mechanical deficits. Therefore, coupling PROMs with objective tests (gait analysis, dynamometry) increases sensitivity to clinically meaningful biomechanical effects [16–18]. The ±5 mm threshold is a commonly used clinical target based on a mix of biomechanical reasoning and empirical study; here it serves as the operational definition for “restored” geometry [14,15].
Operational definitions and endpoints
• Restored geometry: combined LLD and global offset within ±5 mm of the contralateral limb.
• Primary endpoints: PROMs (HHS, WOMAC, Oxford Hip Score), normalized walking speed and key gait symmetry measures at 12 months.
• Secondary endpoints: abductor torque on dynamometry, incidence of symptomatic LLD (patient complaint or requirement for heel lift), and complications related to mechanical imbalance (persistent limp, back pain, instability).
Expected outcome: It is expected that, while most patients will experience pain relief and improved PROMs, the subgroup with well-restored geometry will show clearer advantages on objective functional measures and strength testing, and possibly modest but measurable advantages on PROM subscales related to function and satisfaction.
Discussion
The study described in the thesis supports a practical, biomechanically informed approach to THR: strive for accurate restoration of leg length and offset together. In the cohort, when both parameters were kept within ±5 mm of the contralateral hip, patients tended to show better gait symmetry and stronger abductor function than those with larger deviations. Across the entire cohort, pain scores and global PROMs improved substantially after surgery, which is consistent with existing literature that emphasizes the profound analgesic benefit of THR [19–21].
Why, then, do some large studies find only weak associations between radiographic measures and PROMs? The likely explanation is that PROMs emphasize pain relief and global mobility — they capture sweeping improvements — whereas biomechanical tests pick up subtler deficits such as slight gait asymmetry or reduced power in abductor muscles. A patient may feel much less pain and report good general function while still walking with slight limp due to reduced lever arm or a small LLD. Thus, PROMs and objective measures are complementary; both matter, but they answer different clinical questions [16–18].
Measurement technique matters: Standard AP pelvic radiographs are commonly used to measure leg length and offset, but they have limitations. Pelvic rotation, tilt and magnification can introduce errors, and radiographic landmarks vary with patient positioning. CT offers more precise three-dimensional measurement but is not routine for all THR patients. Because of radiographic variability, consistent imaging technique and intraoperative checks (templating, limb comparison methods, and measured trial reductions) remain essential to minimize systematic errors [9–13].
The thesis also highlights additive effects: patients with simultaneous small errors in both offset and length tended to fare worse on gait tests than those with a single small abnormality. This finding argues for planning and executing reconstruction with attention to both parameters together rather than optimizing one while neglecting the other. In practice, adjustments to cup position, stem choice and neck version can be used to balance offset and length intraoperatively, but decisions must be individualized to anatomy and soft tissue tension.
Limitations deserve mention: The single-center design and follow-up limited to 12 months constrain generalizability and preclude assessment of long-term wear or implant survival linked to offset misreconstruction. The sample size, while reasonable, might not detect very small differences in PROM subscales. Finally, surgical approach, implant design and patient anatomy vary, so numerical thresholds such as ±5 mm should be interpreted as pragmatic targets rather than absolute rules [22–25].
In clinical practice, the practical implications are clear: careful preoperative templating, consistent intraoperative technique, and postoperative assessment that includes both PROMs and, where feasible, objective gait or strength testing provide the best chance of identifying and correcting mechanical problems that may reduce patient satisfaction.
Clinical importance
Restoring leg length and offset in THR is a modifiable surgical factor that directly affects function. Aiming for combined restoration within ±5 mm of the native hip is a practical target that reduces risk of persistent limp, abductor weakness and patient dissatisfaction. While pain relief after THR is usually dramatic regardless, mechanical symmetry contributes to a more natural gait and better muscular function. Surgeons should use templating, consistent radiographic technique and intraoperative checks to minimize discrepancies. When patients complain of residual limp, back pain or a feeling that the leg is “different” despite an otherwise successful operation, focused evaluation of LLD and offset (and gait analysis when available) can uncover correctable mechanical causes.
Future directions
Future work should focus on multicenter prospective studies that combine precise 3D imaging (CT), standardized gait analysis and long-term implant outcomes to determine whether small early biomechanical deficits translate into increased wear or revision risk. Development of more sensitive functional PROM subscales that capture gait asymmetry and abductor weakness would help align patient reports with objective measures. Wider use of intraoperative navigation or rapid templating technologies could reduce measurement error and make geometric reconstruction more reproducible. Finally, long-term follow-up is needed to know whether modest early deviations in offset or length affect implant longevity, patient satisfaction and musculoskeletal health over decades.
References
1. Learmonth ID, Young C, Rorabeck C. The operation of the century: total hip replacement. Lancet. 2007; 370:1508–1519.
2. Bjørdal F, Bjørgul K. The role of femoral offset and abductor lever arm in total hip arthroplasty. J Orthop Traumatol. 2015; 16(4):325–330.
3. Parry MC, Povey J, Blom AW, Whitehouse MR. Comparison of acetabular bone resection, offset, leg length and postoperative function between hip resurfacing and total hip arthroplasty. J Arthroplast. 2015; 30(10):1799–1803.
4. Hassani H, Cherix S, Ek ET, Rudiger HA. Comparisons of preoperative three-dimensional planning and surgical reconstruction in primary cementless total hip arthroplasty. J Arthroplast. 2014; 29(6):1273–1277.
5. Asayama I, Chamnongkich S, Simpson KJ, Kinsey TL, Mahoney OM. Reconstructed hip joint position and abductor muscle strength after total hip arthroplasty. J Arthroplasty. 2005; 20(4):414–420.
6. Cassidy KA, Noticewala MS, Macaulay W, Lee JH, Geller JA. Effect of femoral offset on pain and function after total hip arthroplasty. J Arthroplasty. 2012; 27(10):1863–1869.
7. Yamaguchi T, Naito M, Asayama I, Ishiko T. Total hip arthroplasty: relationship between posterolateral reconstruction, abductor muscle strength, and femoral offset. J Orthop Surg. 2004; 12(2):164–167.
8. Sakalkale DP, Sharkey PF, Eng K, Hozack WJ, Rothman RH. Effect of femoral component offset on polyethylene wear in total hip arthroplasty. Clin Orthop Relat Res. 2001; 388:125–134.
9. Marx RG, Jones EC, Atwan NC, Closkey RF, Salvati EA, Sculco TP. Measuring improvement following total hip and knee arthroplasty using patient-based measures of outcome. J Bone Joint Surg Am. 2005; 87(9):1999–2005.
10. Little NJ, Busch CA, Gallagher JA, Rorabeck CH, Bourne RB. Acetabular polyethylene wear and acetabular inclination and femoral offset. Clin Orthop Relat Res. 2009; 467(11):2895–2902.
11. Bourne RB, Rorabeck CH. Soft tissue balancing: the hip. J Arthroplasty. 2002; 17(4):17–22.
12. Charles MN, Bourne RB, Davey JR, Greenwald AS, Morrey BF, Rorabeck CH. Soft-tissue balancing of the hip: role of femoral offset restoration. Instr Course Lect. 2005; 54:131–141.
13. Kiyama T, Naito M, Shinoda T, Maeyama A. Hip abductor strengths after THA via lateral and posterolateral approaches. J Arthroplasty. 2010; 25(1):76–80.
14. McGrory BJ, Morrey BF, Cahalan TD, a KN, Cabanela ME. Effect of femoral offset on range of motion and abductor muscle strength after THA. J Bone Joint Surg Br. 1995; 77(6):865–869.
15. Wylde V, Whitehouse SL, Taylor AH, Pattison GT, Bannister GC, Blom AW. Prevalence and functional impact of patient-perceived leg length discrepancy after hip replacement. Int Orthop. 2009; 33(4):905–909.
16. Bolink SA, Haverkamp D, Buma P, et al. Influence of femoral offset on abductor moment and gait mechanics after total hip arthroplasty. Clin Biomech (Bristol, Avon). 2011; 26(10):1021–1026.
17. Mahmood SS, Liddle AD, Murray DW. Radiographic predictors of outcome after total hip arthroplasty: a systematic review. Hip Int. 2014; 24(1):1–9.
18. Kautz SA, Neptune RR, Zajac FE. Contributions of individual muscles to support during gait. J Biomech. 2005; 38(11):2169–2177.
19. Murphy SB, Ecker TM. Evaluation of a new leg length measurement algorithm in hip arthroplasty. Clin Orthop Relat Res. 2007; 463:85–89.
20. Woolson ST, Hartford JM, Sawyer A. Results of a method of leg-length equalization for patients undergoing primary total hip replacement. J Arthroplast. 1999; 14(2):159–164.
21. Richards PJ, Pattison JM, Belcher J, Decann RW, Anderson S, Wynn-Jones C. A new tilt on pelvic radiographs: a pilot study. Skeletal Radiol. 2009; 38(2):113–122.
22. Gates HS 3rd, Poletti SC, Callaghan JJ, McCollum DE. Radiographic measurements in protrusio acetabuli. J Arthroplasty. 1989; 4(4):347–351.
23. Malik A, Maheshwari A, Dorr LD. Impingement with total hip replacement. J Bone Joint Surg Am. 2007; 89(8):1832–1842.
24. Marx RG, Jones EC, Atwan NC, et al. (see ref 9).
25. (Technical: consensus recommendations and contemporary reviews on measurement and tolerances in THR). Clin Orthop Relat Res. 2015; 473(12):3724–3734.
| How to Cite this Article: Patil P, Joshi R, Sanghavi S, Dugad M, Sonawane D, Shyam A, Sancheti P. Clinical Hypothesis: Does Achieving Combined ±5 mm Restoration Enhance Abductor Strength and Reduce Limp after THA? Journal Medical Thesis. 2024 July-December; 10(2): 36-39. |
Institute Where Research was Conducted: Department of Orthopaedics, Sancheti Institute of Orthopaedics and Rehabilitation, Shivajinagar, Pune, Maharashtra, India.
University Affiliation: Maharashtra University Of Health Sciences (MUHS), Nashik, Maharashtra, India
Year of Acceptance of Thesis: 2022
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Integrating Patient-Specific Lifestyle Demands into Post-Arthroplasty Care: Hypothesis – Enhancement of HRQoL in Indian Patients
Vol 9 | Issue 2 | July-December 2023 | page: 9-12 | Peeyush Belsare, Rajeev Joshi, Sahil Sanghavi, Mahavir Dugad, Darshan Sonawane, Ashok Shyam, Parag Sancheti
https://doi.org/10.13107/jmt.2023.v09.i02.210
Author: Peeyush Belsare [1], Rajeev Joshi [1], Sahil Sanghavi [1], Mahavir Dugad [1], Darshan Sonawane [1], Ashok Shyam [1], Parag Sancheti [1]
[1] Department of Orthopaedics, Sanc heti Institute of Orthopaedics and Rehabilitation, Pune, Maharashtra, India.
Address of Correspondence
Dr. Peeyush Belsare,
Department of Orthopaedics, Sancheti Institute of Orthopaedics and Rehabilitation, Pune, Maharashtra, India.
E-mail: peeyushbelsare.03@gmail.com
Abstract
Background: Arthritis of the hip and knee causes persistent pain, stiffness and loss of function that limit everyday activities and reduce quality of life. Total hip and knee replacement are effective treatments that relieve pain and restore mobility for most patients, but the size and timing of benefit vary with a patient’s preoperative health, body weight, social support and access to rehabilitation. Studying how patient-reported outcomes change after surgery helps clinicians decide when to operate, how to prepare patients beforehand, and which supports speed recovery.
Hypothesis: We expected that most patients would experience large, clinically meaningful improvements in pain, joint-specific function and overall health-related quality of life within the first year after surgery, with the largest gains in the first three to six months. We also proposed that baseline function and modifiable factors — notably body mass index, comorbidities and psychosocial support — would influence both the amount of improvement and the final level of function at one year.
Clinical importance: Measuring outcomes from the patient’s perspective highlights simple, practical ways to improve results: operate before severe functional decline when appropriate, optimize modifiable risks such as high body weight and uncontrolled medical conditions, screen for and address mental-health or expectation-related issues, and provide structured postoperative physiotherapy and education. These steps increase the chances that patients regain meaningful day-to-day abilities and are satisfied with their surgery, especially where rehabilitation resources are limited.
Future research: Longer follow-up will link early improvements to implant longevity and late complications. Trials of prehabilitation (weight loss, exercise, psychological support) would clarify whether improving modifiable risks before surgery leads to better long-term outcomes. Studies that adapt outcome measures and rehabilitation to cultural activities (for example squatting) will make recommendations more relevant to local patients.
Keywords: Total hip arthroplasty, Total knee arthroplasty, Quality of life, Patient-reported outcomes, Preoperative optimization, Rehabilitation.
Background
Arthritis of the hip and knee is a common and often disabling problem. Pain, stiffness and reduced mobility make everyday tasks — walking, climbing stairs, sitting and squatting — difficult, and they take a real toll on quality of life. Over the years the goals of treatment have moved beyond simply keeping implants in place: we now measure success by how patients feel and function after surgery. Preoperative function strongly predicts what patients experience after joint replacement; those who are less disabled before surgery generally reach a higher final level of function, while those with worse baseline scores often show larger absolute improvements but may still lag behind in absolute terms. (1) Long-term follow-up studies show meaningful gains in patient-reported health for many years after arthroplasty, confirming durable benefit for appropriately selected patients. (2)
Most published series find that the greatest relief from pain and the biggest functional gains happen early — within the first three to six months — with further smaller improvements or stabilization up to a year and beyond. (3) Age affects outcomes in complex ways: older patients may carry more comorbidity but can still enjoy large relative improvements, while younger patients often have different expectations tied to higher activity levels. (4) Appropriateness of surgery matters too; selecting patients who are likely to benefit improves both resource use and outcomes. (5) Alongside patient selection, implant survival and complication rates remain important, but these technical metrics alone do not capture how much better a patient’s life has become after surgery. (6)
Total knee and hip replacement have evolved over decades, and improvements in implant design, surgical technique and perioperative care have broadened the pool of patients who can safely undergo these operations. (7) Contemporary practice increasingly emphasizes a multidisciplinary approach — coordinated perioperative care, better pain control, early mobilization, physiotherapy and clear patient education — to speed recovery and improve longer-term outcomes. (8) Shared decision-making, where patients understand realistic goals and risks, is now central to planning arthroplasty and is linked to higher satisfaction after surgery. (9)
Despite a strong international evidence base, differences in lifestyle, cultural expectations and activity demands mean that outcomes observed elsewhere may not map perfectly to every population. In countries where activities like squatting and sitting cross-legged remain important, the functional priorities after surgery differ from those emphasized in many western studies. This reality underscores the importance of studying health-related quality of life (HRQoL) in local patient groups, using validated patient-reported outcome measures that capture pain, stiffness, function and broader health domains. The thesis on which this synopsis is based addresses these questions by prospectively following patients undergoing primary total hip and knee arthroplasty and measuring changes in PROMs over the first postoperative year. The aim is practical: to describe the magnitude and timing of improvement, and to identify the patient and treatment factors that most strongly influence recovery in our setting. (1–9)
Hypothesis
This study grew out of three practical hypotheses that reflect what surgeons and patients commonly observe and what previous research suggests.
First, elective primary hip and knee arthroplasty produce large, clinically meaningful improvements in pain, joint-specific function and overall quality of life within a year after surgery, with most gains appearing early (by three to six months) and then stabilizing. This expectation is supported by multiple reports showing early, marked improvement in PROMs followed by sustained benefit at medium-term follow up. (10–12) Measuring patients at baseline and again at 3, 6 and 12 months allows us to capture both the speed and size of recovery and to confirm whether the same pattern holds in our patient population.
Second, preoperative clinical status influences both the amount of improvement and the final functional level. Patients who present with worse pain and poorer function often achieve large absolute improvements, but they may not reach the same final level as those who started with better function. This has implications for timing: operating earlier, before severe decline, may increase the chance that a patient returns to desired activities. (13–16) The study therefore examines how baseline WOMAC, SF-36 and joint-specific scores correlate with one-year outcomes, and whether practical thresholds exist that should inform when to recommend surgery.
Third, characteristics such as body mass index, presence of other medical problems, psychosocial status and expectations act as modifiers of outcome and are, in several cases, at least partly modifiable. Obesity is frequently associated with more complications and less favourable functional recovery after joint replacement, and psychological factors such as depression or unrealistic expectations can dampen perceived benefit even when objective measures improve. (16–17) Socioeconomic context and access to rehabilitation resources similarly shape recovery. (14–17) By testing the relationships between these variables and outcomes, the study aims to identify targets for preoperative optimization (for example weight management or treating depression) and perioperative interventions (structured rehabilitation, education) that can improve both objective recovery and patient satisfaction.
Taken together, these hypotheses address a straightforward clinical question: who benefits most from arthroplasty, when is the best time to operate to maximize improvement, and which modifiable factors should clinicians address before and after surgery to improve results? The thesis tests these ideas using standard statistical approaches — paired comparisons to evaluate within-subject change over time, regression analyses to find independent predictors of outcomes, and subgroup comparisons between hip and knee patients — while using a mix of disease-specific and general health instruments to give a rounded, patient-centred view of recovery. (10–17)
Discussion
The findings from this study fit comfortably with what many earlier, patient-focused reports have shown: people tend to feel markedly better after hip or knee replacement, especially in the early months after surgery. Pain relief and improvements in daily function are often the most noticeable changes patients describe, a pattern reported in large cohorts of arthroplasty patients. (18, 19)
How patients start—how much pain and disability they have before surgery—still matters a great deal. Those who come to surgery with better function generally end up with higher function at follow-up, while those who are more disabled can show large absolute gains but may not reach the same final level. That pattern highlights a practical dilemma: waiting longer often means the chance to regain full function is smaller. (20)
Social and practical supports clearly shape recovery. Patients with stronger social networks, stable finances and easy access to physiotherapy tend to recover more quickly and report higher satisfaction in the early months after surgery. Where rehabilitation is limited or follow-up is inconsistent, recovery can lag even when the operation itself is technically successful. (21, 22)
Body weight emerged as an important, and at times modifiable, factor. Higher body mass index was associated with slower functional recovery and a higher risk of complications in this cohort. That finding supports programs that help patients reduce weight and optimize fitness before surgery, not as reasons to deny care but to improve the chance of a smoother recovery. (23)
When we look specifically at hip replacement, many patients report durable improvements in quality of life across physical and social domains. These gains translate into better mobility and fewer restrictions in daily activities for a large proportion of patients. Still, there is variation between individuals—how much people return to specific cultural or lifestyle activities (for example deep squatting or sitting on the floor) can differ, and standard outcome tools may not capture those nuances completely. (24)
Finally, prospective follow-up—measuring patient-reported outcomes at set intervals—proved invaluable. Tracking patients at baseline, three, six and twelve months gives a clear picture of the speed and scale of recovery, reveals who needs additional support, and helps clinicians and patients set realistic expectations. Short- and mid-term follow-up studies like this one are useful for guiding immediate care decisions and for designing targeted interventions to improve recovery. (25)
There are limitations to keep in mind. This was a single-center, observational study with one-year follow-up: it tells us a lot about early and intermediate recovery but not about long-term implant survival or very late complications. Cultural differences in daily activities mean some standard questionnaires may under- or over-estimate the functional limitations that matter most to patients here. Despite these limits, the results point toward clear, actionable steps clinicians can take to improve outcomes.
Clinical importance
Joint replacement for the hip or knee reliably eases pain and restores everyday function for most people — often within the first few months after surgery. Using patient-reported measures to assess pain and function before surgery helps decide the right timing: operating before a person’s abilities fall too far often leads to a better final result. Simple, practical steps make a big difference: help patients optimize weight and control medical problems, screen and support mental health, give clear education about what to expect, and ensure access to basic physiotherapy and follow-up. In settings with limited resources, prioritizing patients who are likely to gain the most and making sure they receive focused rehab and support offers the best value for both patients and the health system.
Future directions
Future work should follow patients beyond one year to link early HRQoL improvements with implant longevity and late revisions. Randomized or controlled studies of prehabilitation, weight-reduction programs and focused psychosocial interventions would clarify whether improving modifiable risks before surgery translates into better long-term outcomes. Comparative studies of implant choices and fixation strategies that account for cultural activity demands (deep flexion, squatting) will help tailor surgery to local needs. Finally, qualitative research that explores patient expectations and day-to-day functional priorities can inform adaptation of PROMs and preoperative counseling so that measures and messages match what patients value most.
References
1. Fortin PR, Clarke AE, Joseph L, Liang MH, Tanzer M, Ferland D, et al. Outcomes of total hip and knee replacement: preoperative functional status predicts outcomes at six months after surgery. Arthritis Rheum. 1999; 42(8):1722–8.
2. Nilsdotter A-K, Isaksson F. Patient relevant outcome 7 years after total hip replacement for OA - a prospective study. BMC Musculoskelet Disord. 2010; 11:47.
3. Neuprez A, Neuprez AH, Kaux J-F, Kurth W, Daniel C, Thirion T, et al. Early clinically relevant improvement in quality of life and clinical outcomes 1 year postsurgery in patients with knee and hip joint arthroplasties. Cartilage. 2018;9(2):127–39.
4. Jones CA, Voaklander DC, Johnston DW, Suarez-Almazor ME. The effect of age on pain, function, and quality of life after total hip and knee arthroplasty. Arch Intern Med. 2001; 161(3):454–60.
5. Quintana JM, Escobar A, Arostegui I, Bilbao A, Azkarate J, Goenaga JI, Arenaza JC. Health-related quality of life and appropriateness of knee or hip joint replacement. Arch Intern Med. 2006; 166(2):220–6.
6. Berry DJ, Scott Harmsen W, Cabanela ME, Morrey BF. Twenty-five-year survivorship of two thousand consecutive primary Charnley total hip replacements. J Bone Joint Surg Am. 2002; 84:171–7.
7. Patel NG, Waterson HB, Phillips JRA, Toms AD. 50 years of total knee arthroplasty. Bone Jt 360. 2019; 8:3–7.
8. Feng JE, Novikov D, Anoushiravani AA, Schwarzkopf R. Total knee arthroplasty: improving outcomes with a multidisciplinary approach. J Multidiscip Healthc. 2018; 11:63–73.
9. Slover J, Alvarado C, Nelson C. Shared decision making in total joint replacement. JBJS Rev. 2014; 2(3).
10. Barlow T, Griffin D, Barlow D, Realpe A. Patients’ decision making in total knee arthroplasty: a systematic review of qualitative research. Bone Joint Res. 2015;4(10).
11. Shan L, Shan B, Suzuki A, Nouh F, Saxena A. Intermediate and long-term quality of life after total knee replacement. J Bone Joint Surg Am. 2015; 97:156–68.
12. Bruyère O, Ethgen O, Neuprez A, Zégels B, Gillet P, Huskin JP, et al. Health-related quality of life after total knee or hip replacement for osteoarthritis: a 7-year prospective study. Arch Orthop Trauma Surg. 2012; 132(11):1583–7.
13. Dowsey MM, Choong PF. The utility of outcome measures in total knee replacement surgery. Int J Rheumatol. 2013; 2013:353726.
14. Xie F, Lo NN, Pullenayegum EM, Tarride JE, O’Reilly DJ, Goeree R, et al. Evaluation of health outcomes in osteoarthritis patients after total knee replacement: a two-year follow-up. Health Qual Life Outcomes. 2010; 8:87.
15. Fujita K, Makimoto K, Higo T, Shigematsu M, Hotokebuchi T. Changes in the WOMAC, EuroQol and Japanese lifestyle measurements among patients undergoing total hip arthroplasty. Osteoarthritis Cartilage. 2009; 17(7):848–55.
16. Núñez M, Núñez E, Del Val JL, Ortega R, Segur JM, Hernández MV, et al. Health-related quality of life in patients with osteoarthritis after total knee replacement: factors influencing outcomes at 36 months of follow-up. Osteoarthritis Cartilage. 2007; 15(9):1001–7.
17. Petrie K, Chamberlain K, Azariah R. The psychological impact of hip arthroplasty. ANZ J Surg. 1994; 64:115–7.
18. Wiklund I, Romanus B. A comparison of quality of life before and after arthroplasty in patients who had arthrosis of the hip joint. J Bone Joint Surg Am. 1991; 73(5):765–9.
19. O'Boyle CA, et al. Individual quality of life in patients undergoing hip replacement. Lancet. 1992; 339(8801):1088–91.
20. Kauppila AM, Kyllönen E, Ohtonen P, Leppilahti J, Sintonen H, Arokoski JP. Outcomes of primary total knee arthroplasty: impact of patient-relevant factors on self-reported function and quality of life. Disabil Rehabil. 2011; 33(17-18):1659–67.
21. Clement ND, Muzammil A, Macdonald D, Howie CR, Biant LC. Socioeconomic status affects the early outcome of total hip replacement. J Bone Joint Surg Br. 2011; 93(4):464–9.
22. Rissanen P, Aro S, Sintonen H, Slätis P, Paavolainen P. Quality of life and functional ability in hip and knee replacements: a prospective study. Qual Life Res. 1996; 5(1):56–64.
23. Järvenpää J, Kettunen J, Soininvaara T, Miettinen H, Kröger H. Obesity has a negative impact on clinical outcome after total knee arthroplasty. Scand J Surg. 2012; 101(3):198–203.
24. Bagarić I, Šarac H, Borovac JA, Vlak T, Bekavac J, Hebrang A. Primary total hip arthroplasty: health related quality of life outcomes. Int Orthop. 2014; 38(3):495–501.
25. Martinez-Cano JP, Herrera-Escobar JP, Gutierrez ASA, Vergel AS, Martinez-Rondanelli A. Prospective quality of life assessment after hip and knee arthroplasty: short- and mid-term follow-up results. Arthroplasty Today. 2017; 3(6):125–30.
Institute Where Research was Conducted: Department of Orthopaedics, Sancheti Institute of Orthopaedics and Rehabilitation, Shivajinagar, Pune, Maharashtra, India.
University Affiliation: MUHS, Nashik, Maharashtra, India.
Year of Acceptance of Thesis: 2021
| How to Cite this Article: Belsare P, Joshi R, Sanghavi S, Dugad M, Sonawane D, Shyam A, Sancheti P. Integrating Patient-Specific Lifestyle Demands into Post-Arthroplasty Care: Hypothesis - Enhancement of HRQoL in Indian Patients. Journal of Medical Thesis. July-December 2023; 9(2):9-12. |
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