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Mahmood F, Rae F, Rae S, Ewen A, Holloway N, Clarke J. Mid-term results of an anatomic total knee replacement design. Arch Orthop Trauma Surg 2024; 144:2239-2247. [PMID: 38512460 DOI: 10.1007/s00402-024-05246-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 02/17/2024] [Indexed: 03/23/2024]
Abstract
INTRODUCTION A significant proportion of patients remain dissatisfied following total knee arthroplasty (TKA) surgery. Reasons for this are unclear. Contemporary implants seek to mirror innate anatomy. Such innovations are necessarily subject to scrutiny to validate their use. The Zimmer-Biomet Persona® Personalized Knee system is such an anatomic TKA. This work seeks to establish medium term survival data and patient reported outcomes for this implant. METHODS This was a cohort study of prospectively collected data on all patients undergoing Persona TKA at our institution. Patients were managed using a standardised protocol for intra- and post-operative care. Survivorship data were collected using our National Joint Registry and corroborated with local data. Range of motion, Oxford Knee Score (OKS) and patient satisfaction were recorded at six weeks and one year post-operatively. Hip-knee-ankle radiographs were used to record pre- and post-operative alignment. RESULTS Data were collected for 749 knees in 679 patients. Overall survivorship was 99.0% at a mean 5.35 years, with seven patients undergoing revision surgery during the study period. Significant improvements in the OKS (mean 20.7 points) and range of motion were observed (mean 104.6° at one year). 94.9% of patients were satisfied at one year. Mean correction was to a mechanical femoro-tibial angle of 0.8° varus. CONCLUSIONS We demonstrate excellent medium term survival of the Persona TKA in this large cohort, coupled with improvements in patient reported outcomes, range of motion and patient satisfaction at one year which compare favourably to other implants.
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Affiliation(s)
- Fahd Mahmood
- Department of Orthopaedics, Golden Jubilee University National Hospital, Agamemnon Street, Clydebank, Glasgow, G81 4DY, UK.
| | - Fraser Rae
- Department of Orthopaedics, Golden Jubilee University National Hospital, Agamemnon Street, Clydebank, Glasgow, G81 4DY, UK
| | - Sophie Rae
- Department of Orthopaedics, Golden Jubilee University National Hospital, Agamemnon Street, Clydebank, Glasgow, G81 4DY, UK
| | - Alistair Ewen
- Department of Orthopaedics, Golden Jubilee University National Hospital, Agamemnon Street, Clydebank, Glasgow, G81 4DY, UK
| | - Nicholas Holloway
- Department of Orthopaedics, Golden Jubilee University National Hospital, Agamemnon Street, Clydebank, Glasgow, G81 4DY, UK
| | - Jon Clarke
- Department of Orthopaedics, Golden Jubilee University National Hospital, Agamemnon Street, Clydebank, Glasgow, G81 4DY, UK
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Dubin JA, Hameed D, Bains SS, Chen Z, Monárrez R, Gilmor R, Delanois RE, Nace J. Cementless medial pivot design demonstrates equal or better outcomes compared to cementless cruciate-retaining design following total knee arthroplasty. J Orthop 2024; 50:65-69. [PMID: 38173828 PMCID: PMC10758622 DOI: 10.1016/j.jor.2023.11.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 01/05/2024] Open
Abstract
Introduction Traditional total knee arthroplasty (TKA) designs fail to reproduce physiologic knee kinematics, which can contribute to patient dissatisfaction. In an attempt to restore more normal knee kinematics, the medial pivot (MP) design may improve knee function and stability as well as patient satisfaction. A limited number of studies have compared postoperative outcomes of exclusively cementless Cruciate-Retaining (CR) TKAs to cementless MP TKAs. We aimed to compare: (1) 90-day, 1-year, and 2-year complications and revisions, (2) preoperative and postoperative range of motion (ROM), (3) Knee Injury and Osteoarthritis Outcome (KOOS-JR), and (4) visual analog scale (VAS) pain scores at 3-month, 6-month, 1-year, and 2-years. Methods A retrospective analysis was performed to identify all patients who had previously undergone a TKA at our institution and compare a cementless CR system to a cementless MP design. Categorical variables, including demographics, comorbidities, and complications utilized Chi-square tests in bivariable analysis. Continuous variables, such as age, were compared using Student's t-tests. Significance was defined as p < 0.05. Results Cementless CR and cementless MP cohorts showed low profiles of postoperative complications and favorable patient-reported outcome measures (PROMs). The MP cohort had lower VAS pain at 1-year (1.70 vs. 3.76, p < 0.001) and 2-years (1.43 vs. 2.60, p < 0.001) and higher ROM at 3-months (118 vs. 100, p < 0.001), 6-months (113 vs. 103, p < 0.0001), and 1-year (117 vs. 110, p = 0.02), respectively. Conclusion This study is the first comparison of postoperative outcomes between a cementless CR TKA and cementless MP TKA designs. Implant design and fixation type are vital components influencing patient satisfaction after TKA. Pain scores and range of motion favored the cementless MP cohort in comparison to the cementless CR cohort.
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Affiliation(s)
- Jeremy A. Dubin
- Lifebridge Health, Sinai Hospital of Baltimore, Rubin Institute for Advanced Orthopedics, Baltimore, MD, USA
| | - Daniel Hameed
- Lifebridge Health, Sinai Hospital of Baltimore, Rubin Institute for Advanced Orthopedics, Baltimore, MD, USA
| | - Sandeep S. Bains
- Lifebridge Health, Sinai Hospital of Baltimore, Rubin Institute for Advanced Orthopedics, Baltimore, MD, USA
| | - Zhongming Chen
- Lifebridge Health, Sinai Hospital of Baltimore, Rubin Institute for Advanced Orthopedics, Baltimore, MD, USA
| | - Rubén Monárrez
- Lifebridge Health, Sinai Hospital of Baltimore, Rubin Institute for Advanced Orthopedics, Baltimore, MD, USA
| | - Ruby Gilmor
- Lifebridge Health, Sinai Hospital of Baltimore, Rubin Institute for Advanced Orthopedics, Baltimore, MD, USA
| | - Ronald E. Delanois
- Lifebridge Health, Sinai Hospital of Baltimore, Rubin Institute for Advanced Orthopedics, Baltimore, MD, USA
| | - James Nace
- Lifebridge Health, Sinai Hospital of Baltimore, Rubin Institute for Advanced Orthopedics, Baltimore, MD, USA
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Hodgeson SM, Soeno T, Mears SC, Stambough JB, Barnes CL, Stronach BM. The Medial Pivot Design in Total Knee Arthroplasty. Orthop Clin North Am 2024; 55:49-59. [PMID: 37980103 DOI: 10.1016/j.ocl.2023.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2023]
Abstract
Medial pivot total knee arthroplasty implants are designed to function in a similar manner to that of the native knee with a relatively fixed medial center of rotation and a less conforming lateral compartment that follows an arcuate path. Medial pivot implants in total knee arthroplasty have increased in popularity with many companies offering medial pivot or retrofitted medial congruent implants, and there are variations between the various medial pivot and medial congruent implants. Existing literature on medial pivot implants have demonstrated high survivorship and patient outcomes. More studies are needed to compare newer medial pivot implants with each other and with retrofitted medial congruent implants.
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Affiliation(s)
- Sydney M Hodgeson
- Department of Orthopaedics, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 531, Little Rock, AR 72205, USA
| | - Tatsuya Soeno
- Department of Orthopaedics, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 531, Little Rock, AR 72205, USA
| | - Simon C Mears
- Department of Orthopaedics, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 531, Little Rock, AR 72205, USA
| | - Jeffrey B Stambough
- Department of Orthopaedics, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 531, Little Rock, AR 72205, USA
| | - C Lowry Barnes
- Department of Orthopaedics, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 531, Little Rock, AR 72205, USA
| | - Benjamin M Stronach
- Department of Orthopaedics, University of Arkansas for Medical Sciences, 4301 West Markham Street, Slot 531, Little Rock, AR 72205, USA.
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Movassaghi K, Patel A, Ghulam-Jelani Z, Levine BR. Modern Total Knee Arthroplasty Bearing Designs and the Role of the Posterior Cruciate Ligament. Arthroplast Today 2023; 21:101130. [PMID: 37151403 PMCID: PMC10160699 DOI: 10.1016/j.artd.2023.101130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 02/04/2023] [Accepted: 03/08/2023] [Indexed: 05/09/2023] Open
Abstract
The role of the posterior cruciate ligament (PCL) in total knee arthroplasty (TKA) surgery continues to be a source of debate among the adult reconstruction community. In native knee flexion, the PCL is comprised of an anterolateral and posteromedial bundle that work together to limit posterior tibial translation and allow adequate femoral rollback for deep flexion. In the arthritic knee, the PCL can often become dysfunctional and attenuated, which led to the development of posterior stabilized (PS) TKA bearing options. PS TKAs implement a cam-post construct to functionally replace a resected PCL. While PS designs may facilitate balancing knees with significant deformity, they are associated with complications such as postfracture, increased wear, and patellar clunk/crepitus. In recent years, newer designs have been popularized with greater degrees of congruency and incorporation of medial and lateral pivoting to better recreate native knee kinematics. The American Joint Registry has confirmed the recent predilection for ultra-congruent and cruciate-retaining TKA inserts over PS TKAs during the last decade. Studies have failed to identify an overall clinical superiority between the cruciate substituting and sacrificing designs. The literature has also failed to identify clinical consequences from PCL resection with modern, more conforming TKA designs. In this article, we review modern PCL sacrificing designs and discuss the impact of each on the kinematics after TKA. We also will delineate the role of the PCL in modern TKA in the hopes to better understand the recent surge in sacrificing but not substituting knee implants.
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Affiliation(s)
- Kamran Movassaghi
- Department of Orthopaedic Surgery, University of California, San Francisco Fresno, Fresno, CA, USA
- Corresponding author. University of California, San Francisco Fresno, 2823 Fresno Street, Fresno, CA 93721, USA. Tel.: +1 818 640 5244.
| | - Arpan Patel
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA
| | - Zohal Ghulam-Jelani
- Department of Orthopaedic Surgery, University of California, San Francisco Fresno, Fresno, CA, USA
| | - Brett R. Levine
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA
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Kato M, Warashina H, Mitamura S, Kataoka A. Medial pivot-based total knee arthroplasty achieves better clinical outcomes than posterior-stabilised total knee arthroplasty. Knee Surg Sports Traumatol Arthrosc 2023; 31:998-1010. [PMID: 36089624 PMCID: PMC9464619 DOI: 10.1007/s00167-022-07149-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 08/30/2022] [Indexed: 11/28/2022]
Abstract
PURPOSE Stability in the sagittal plane, particularly regarding anterior cruciate ligament compensation, and postoperative functionality and satisfaction remain issues in total knee arthroplasty. Therefore, this prospective study compared the clinical outcomes between medial-pivot-based and posterior-stabilised total knee arthroplasty based on anterior translation and clinical scores. METHODS To assess outcomes of total knee arthroplasty for varus osteoarthritis, the anterior translation distance of the tibia relative to the femur was measured at 30 and 60° of flexion using a KS measure Arthrometer at 6 months postoperatively. The 2011 Knee Society Score, Forgotten Joint Score, visual analogue scale for pain, and range of motion were assessed at 6 months and 1 year postoperatively. The correlations among each score, anterior translation distance, range of motion, and visual analogue scale score for pain were investigated. RESULTS The medial-pivot and posterior-stabilised groups comprised 70 and 51 patients, respectively. The medial-pivot group exhibited a significantly shorter anterior translation distance at 60° flexion than the posterior-stabilised group. Furthermore, the medial-pivot group achieved significantly better outcomes regarding the visual analogue scale for pain, 2011 Knee Society Score, and Forgotten Joint Score than the posterior-stabilised group. A significant negative correlation was observed between the anterior translation distance and the function score of the 2011 Knee Society Score, whereas a significant positive correlation was found between the anterior translation distance and flexion angle, and between the extension angle and score of the Forgotten Joint Score or 2011 Knee Society Score. Significant negative correlations were also found between the pain visual analogue scale and both the 2011 Knee Society Score and Forgotten Joint Score. CONCLUSION In total knee arthroplasty for osteoarthritis, the medial-pivot group displayed a shorter anterior translation distance than the posterior-stabilised group at 6 months postoperatively. The visual analogue scale score for pain was also significantly lower in the medial-pivot group than that in the posterior-stabilised group at both 6 months and 1 year postoperatively. Because a correlation was observed between the anterior translation distance and the function score, medial-pivot-based total knee arthroplasty was considered to significantly improve postoperative function compared to posterior-stabilised total knee arthroplasty.
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Affiliation(s)
- Michitaka Kato
- Nagoya Joint Replacement Orthopaedic Clinic, 7 Iponbashi, Takadaji, Kita-Nagoya, Aichi, 481-0011, Japan.
| | - Hideki Warashina
- Nagoya Joint Replacement Orthopaedic Clinic, 7 Iponbashi, Takadaji, Kita-Nagoya, Aichi 481-0011 Japan
| | - Shingo Mitamura
- Nagoya Joint Replacement Orthopaedic Clinic, 7 Iponbashi, Takadaji, Kita-Nagoya, Aichi 481-0011 Japan
| | - Akito Kataoka
- Nagoya Joint Replacement Orthopaedic Clinic, 7 Iponbashi, Takadaji, Kita-Nagoya, Aichi 481-0011 Japan
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Medial Pivot Designs Versus Conventional Bearing Types in Primary Total Knee Arthroplasty: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. J Am Acad Orthop Surg Glob Res Rev 2022; 6:01979360-202212000-00006. [PMID: 36732308 PMCID: PMC9726426 DOI: 10.5435/jaaosglobal-d-22-00170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 09/09/2022] [Indexed: 01/25/2023]
Abstract
BACKGROUND Medial pivot (MP) designs are growing in popularity. They provide increased sagittal plane stability and theoretically replicate some aspects of native joint kinematics, which may improve total knee arthroplasty outcomes. METHODS A systematic review was performed of randomized controlled trials (RCTs) that compared MP designs with cruciate-retaining, posterior-stabilized (PS), ultracongruent, or mobile-bearings in primary total knee arthroplasty, according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. The primary outcome measures were all clinical function scores, patient-reported outcome measures, and range of motion. The secondary outcome was complications. Two authors independently selected studies, performed data extraction, and risk-of-bias assessment. Studies at high risk of bias were excluded from meta-analysis. Treatment effects were assessed using random-effects meta-analysis and quantified using pooled mean differences or incidence rate differences as appropriate. RESULTS Eight RCTs met inclusion criteria. Five compared MP with PS, two with ultracongruent, and one with cruciate-retaining and mobile-bearing. In total, 350 knees were randomized to MP and 375 to conventional bearings. One RCT was excluded from meta-analysis because of high risk of bias. Meta-analysis comparing MP with PS only was possible and found no differences at any time points for any outcome measure, including 2-year follow-up for Oxford Knee Score (MD = 0.35 favoring PS; 95% CI -0.49 to 1.20) and range of motion (MD = 1.58 favoring MP; 95% CI -0.76 to 11.92, P = 0.30) and 12 months for Western Ontario Arthritis Index (MD = 4.42 favoring MP; 95% CI -12.04 to 3.20, P = 0.09). CONCLUSIONS There is no difference in clinical outcomes, with contemporary measurement tools, at any time points, between MP and PS. There are insufficient RCTs comparing MP with other bearings.
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Kahlenberg CA, Chalmers B, Sun HJ, Mayman DJ, Westrich GH, Haas SB, Sculco PK. Polyethylene Components in Primary Total Knee Arthroplasty: A Comprehensive Overview of Fixed Bearing Design Options. J Knee Surg 2022; 35:1401-1408. [PMID: 33618396 DOI: 10.1055/s-0041-1723981] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The articular design of a polyethylene insert influences the kinematics and overall function of a total knee arthroplasty (TKA). Standard symmetric posterior-stabilized and cruciate-retaining polyethylene designs have a long track record of high patient satisfaction and longevity in TKA. However, the number and variety of polyethylene inserts and articulations have continued to evolve in an attempt to better replicate native knee kinematics or provide additional constraint. Ultracongruent polyethylene designs have been touted as increasing stability while maintaining the benefits of cruciate-retaining knees. Medial pivot and lateral/dual pivot polyethylene designs were introduced to mimic more normal knee kinematics with regard to femoral rollback. Further, with increasing recognition of knee instability as a cause for persistent symptoms and revision TKA, the utilization of midlevel constraint polyethylene inserts has been increasing, with multiple implant companies offering an insert design with increased constraint for use with a primary femoral component. In this rapidly evolving arena in with a myriad of options available, surgeons should be knowledgeable about the design concepts and their applicable uses for specific patient scenarios. Future research is needed to better understand whether a particular type or design of polyethylene insert and articulation leads to improved patient reported outcomes, improved replication of knee kinematics, and long-term durable implant survivorship.
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Affiliation(s)
- Cynthia A Kahlenberg
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York City, New York
| | - Brian Chalmers
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York City, New York
| | - Hyung Jin Sun
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York City, New York
| | - David J Mayman
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York City, New York
| | - Geoffrey H Westrich
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York City, New York
| | - Steven B Haas
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York City, New York
| | - Peter K Sculco
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York City, New York
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Comparison of postoperative knee flexion and patient satisfaction between newly and conventionally designed medial pivot total knee arthroplasty: a 5-year follow-up matched cohort study. Arch Orthop Trauma Surg 2022; 142:2057-2064. [PMID: 34390387 DOI: 10.1007/s00402-021-04121-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 08/09/2021] [Indexed: 10/20/2022]
Abstract
INTRODUCTION The medial pivot total knee arthroplasty (TKA) has good patients' satisfaction; however, there is likely the restriction of postoperative knee flexion. The 2nd generation medial pivot TKA prosthesis was designed to improve postoperative knee flexion. This study aimed to compare the clinical outcomes and patient satisfaction between the 2nd generation and 1st generation medial pivot TKA prostheses. MATERIALS AND METHODS We conducted a retrospective study of 472 consecutive TKAs, performed using either the 2nd generation (EVOLUTION™), having smaller posterior femoral condyle and asymmetrical tibial tray, or 1st generation (ADVANCE™) prosthesis. The use of each system was historically determined. Patient age, sex and body mass index were matched between the two groups, with 157 cases ultimately included in each group. Measured clinical outcomes included: knee range of motion, the Knee Society Score, the rate of re-operation, and radiological parameters. Patient satisfaction was evaluated using the 12-item Forgotten Joint Score (FJS-12). RESULTS The average follow-up period was 5.0 (3.7-6.3) years for the 2nd generation group and 8.7 (6.1-12.8) years for the 1st generation group (p < 0.01). The postoperative knee flexion range was 127° (80°-140°) for the 2nd generation and 118° (90°-135°) for the 1st generation at final follow-up (p < 0.01). On multivariate regression analysis, use of the 2nd generation prosthesis predicted greater postoperative knee flexion. The average FJS-12 score was 64 (0-100) for the 2nd generation and mean 57 (0-100) for the 1st generation (p < 0.01). Other clinical outcomes were similar between the two groups. CONCLUSIONS Compared to the 1st generation, the 2nd generation medial pivot prosthesis provides greater postoperative knee flexion and patient satisfaction.
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Lewis PL, Campbell DG, Lorimer MF, Requicha F, W-Dahl A, Robertsson O. Primary Total Knee Arthroplasty Revised for Instability: A Detailed Registry Analysis. J Arthroplasty 2022; 37:286-297. [PMID: 34763047 DOI: 10.1016/j.arth.2021.11.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 10/20/2021] [Accepted: 11/01/2021] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Instability after total knee arthroplasty is a common but poorly understood complication. METHODS Data from a large national registry was used to study patient and prosthesis characteristics of 2605 total knee arthroplasty revisions for instability. The cumulative percent revision was calculated using Kaplan-Meier estimates, and Cox proportional models used to compare revision rates. The rate of further revision was analyzed with regard to prostheses used in the first revision. RESULTS Instability increased from 6% of all first revision procedures in 2003 to 13% in 2019. The revision risk was lower for minimally stabilized prostheses, males, and patients aged ≥65 years. Polyethylene insert exchange was used for 55% of revision procedures, using a thicker insert in 93% and a change in insert conformity in 24% of cruciate-retaining knees. The increase in either thickness or conformity had no effect on the rate of further revision. After a revision for instability, 24% had a second revision by 14 years. Recurrent instability accounted for 32% of further revisions. A lower second revision rate was seen after revision of both femoral and tibial components, and where constrained components were used. CONCLUSION Revision for instability is increasing. Revising both femoral and tibial components led to a lower rate of second revision compared to a change in insert alone. Recurrent instability was common.
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Affiliation(s)
- Peter L Lewis
- Australian Orthopaedic Association National Joint Replacement Registry (AOANJRR), Adelaide, South Australia
| | | | - Michelle F Lorimer
- South Australian Health and Medical Research Institute (SAHMRI), Adelaide, South Australia
| | | | - Annette W-Dahl
- Department of Orthopaedics, Faculty of Medicine, Clinical Science Lund, Lund University, Lund, Sweden
| | - Otto Robertsson
- Department of Orthopaedics, Faculty of Medicine, Clinical Science Lund, Lund University, Lund, Sweden
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Okamoto Y, Wakama H, Okayoshi T, Matsuyama J, Otsuki S, Neo M. Spinopelvic mismatch is associated with patient-reported outcome measures after total knee arthroplasty at a mean follow-up of 15 years. Knee 2022; 34:156-166. [PMID: 34923348 DOI: 10.1016/j.knee.2021.11.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/02/2021] [Accepted: 11/25/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Total knee arthroplasty (TKA) is widely performed; yet, up to 25% of patients are dissatisfied with outcomes. Our aim was to evaluate the association between a spinopelvic mismatch and patient-reported outcomes after TKA. METHODS This was a retrospective study of 101 TKAs performed for osteoarthritis, at a mean 14.6 (range, 10.0-18.0) years post-surgery. Postoperative knee joint perception was evaluated as 'artificial', with or without restrictions, or 'natural'. Age, sex and the spinopelvic mismatch were compared between the 'artificial' (n = 54) and 'natural' (n = 47) perception groups. Multiple logistic regression analysis was used to identify predictive factors of an artificial perception, with a receiver operating characteristic curve to identify cut-off values for significant factors. RESULTS A spinopelvic mismatch, defined as a pelvic incidence minus lumbar lordosis (PI-LL) ≥ 10°, was associated with an artificial perception (odds ratio, 1.57; 95% confidence interval, 1.29-3.22; P = 0.023). An artificial joint perception was related to lower Knee Injury and Osteoarthritis Outcome Score-Joint Replacement (KOOS-JR, P = 0.021) and EuroQol 5-Dimension (EQ-5D, P = 0.025) scores. The cut-off PI-LL of 11° differentiated the groups with a sensitivity of 87.0% and specificity of 91.9%. Postoperative KOOS-JR (P < 0.001), EQ-5D (P = 0.014), satisfaction (P = 0.015), knee extension angle (P = 0.024), and perception (P = 0.032) differed between the groups when the PI-LL threshold was set at 10°. CONCLUSION A spinopelvic mismatch (PI-LL ≥ 10°) is associated with a risk of artificial perception of function after TKA. Measurement of the PI-LL could assist patients and surgeons to predict TKA outcomes.
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Affiliation(s)
- Yoshinori Okamoto
- Department of Orthopedic Surgery, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki 569-8686, Japan.
| | - Hitoshi Wakama
- Department of Orthopedic Surgery, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki 569-8686, Japan.
| | - Tomohiro Okayoshi
- Department of Orthopedic Surgery, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki 569-8686, Japan.
| | - Junya Matsuyama
- Department of Orthopedic Surgery, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki 569-8686, Japan.
| | - Shuhei Otsuki
- Department of Orthopedic Surgery, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki 569-8686, Japan.
| | - Masashi Neo
- Department of Orthopedic Surgery, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-machi, Takatsuki 569-8686, Japan.
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Song YD, Nakamura S, Kuriyama S, Nishitani K, Ito H, Morita Y, Yamawaki Y, Matsuda S. Biomechanical Comparison of Kinematic and Mechanical Knee Alignment Techniques in a Computer Simulation Medial Pivot Total Knee Arthroplasty Model. J Knee Surg 2021; 36:596-604. [PMID: 34891188 DOI: 10.1055/s-0041-1740392] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Several concepts may be used to restore normal knee kinematics after total knee arthroplasty. One is a kinematically aligned (KA) technique, which restores the native joint line and limb alignment, and the other is the use of a medial pivot knee (MPK) design, with a ball and socket joint in the medial compartment. This study aimed to compare motions, contact forces, and contact stress between mechanically aligned (MA) and KA (medial tilt 3° [KA3] and 5° [KA5]) models in MPK. An MPK design was virtually implanted with MA, KA3, and KA5 in a validated musculoskeletal computer model of a healthy knee, and the simulation of motion and contact forces was implemented. Anteroposterior (AP) positions, mediolateral positions, external rotation angles of the femoral component relative to the tibial insert, and tibiofemoral contact forces were evaluated at different knee flexion angles. Contact stresses on the tibial insert were calculated using finite element analysis. The AP position at the medial compartment was consistent for all models. From 0° to 120°, the femoral component in KA models showed larger posterior movement at the lateral compartment (0.3, 6.8, and 17.7 mm in MA, KA3, and KA5 models, respectively) and larger external rotation (4.2°, 12.0°, and 16.8° in the MA, KA3, and KA5 models, respectively) relative to the tibial component. Concerning the mediolateral position of the femoral component, the KA5 model was positioned more medially. The contact forces at the lateral compartment of all models were larger than those at the medial compartment at >60° of knee flexion. The peak contact stresses on the tibiofemoral joint at 90° and 120° of knee flexion were higher in the KA models. However, the peak contact stresses of the KA models at every flexion angle were <20 MPa. The KA technique in MPK can successfully achieve near-normal knee kinematics; however, there may be a concern for higher contact stresses on the tibial insert.
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Affiliation(s)
- Young Dong Song
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shinichiro Nakamura
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shinichi Kuriyama
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kohei Nishitani
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hiromu Ito
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Department of Advanced Medicine for Rheumatic Diseases, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yugo Morita
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yusuke Yamawaki
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shuichi Matsuda
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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12
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Jenny JY, Bercovy M, Cazenave A, Gaillard T, Châtain F, Jolles BE, Rouvillain JL, Saragaglia D. No difference in 13-year survival after medial pivot or central pivot mobile bearing total knee arthroplasty. A propensity matched comparative analysis. Knee Surg Sports Traumatol Arthrosc 2021; 29:3648-3653. [PMID: 33165636 DOI: 10.1007/s00167-020-06355-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 10/26/2020] [Indexed: 11/30/2022]
Abstract
PURPOSE The present study was designed to evaluate the long-term results (more than 10 years) of mobile bearing total knee arthroplasty (TKA) and to compare the survival of medial pivot axis (MPA) and central pivot axis (CPA) TKAs. The primary hypothesis was that the 10- to 15-year survival rate of MPA TKAs will be better than CPA TKAs. METHODS A national, multicenter, retrospective study was performed in France. In this case-control design, 1154 TKAs were paired into the CPA group (control group: 577 cases) and MPA group (study group: 577 cases) based on a logistic regression analysis of age, gender, body mass index and severity of the coronal deformity, defining the propensity score for each case. Final survival information follow-up was obtained for 946 cases (82%). RESULTS There was no significant difference between the control and study groups for any baseline data. Twenty-two prosthetic revisions (2%) were performed for mechanical reasons during the follow-up period. There was no significant difference between the 13-year survival rates of CPA (98%) and MPA (97%) TKAs. There was no significant difference between groups in their final Oxford and Knee Society scores. CONCLUSION Our findings do not support the assumption that medialization of the pivot axis of a mobile bearing TKA improves clinical results or survival. LEVEL OF EVIDENCE Level III.
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Affiliation(s)
- Jean-Yves Jenny
- University Hospital Strasbourg, CCOM, 10 avenue Baumann, 67400, Illkirch, France.
| | - Michel Bercovy
- Clinique Arago, 187A Rue Raymond Losserand, 75014, Paris, France
| | - Alain Cazenave
- Institut CALOT, Department of Orthopedic Surgery, 52 rue du Dr Calot, 62600, Berck-sur-Mer, France
| | - Thierry Gaillard
- Polyclinique du Beaujolais, 120 Ancienne Route de Beaujeu, 69400, Arnas, France
| | - Frédéric Châtain
- Pole Santé Axone, 75 Avenue Gabriel Péri, 38400, Saint-Martin-d'Hères, France
| | - Brigitt E Jolles
- Swiss BioMotion Lab, Department of Musculoskeletal Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Avenue Louis-Ruchonnet 57, 1003, Lausanne, Switzerland.,Institute of Micro Engineering, Ecole Polytechnique Fédérale de Lausanne, Route Cantonale, 1015, Lausanne, Switzerland
| | - Jean-Louis Rouvillain
- Department of Orthopaedic and Trauma Surgery, Hôpital Zobda Quitman, 97261, Fort-de-France, France
| | - Dominique Saragaglia
- Department of Osteoarthritis and Sport Surgery, Traumatology of the Limbs, Grenoble-Alpes South Teaching Hospital, 38130, Echirolles, France
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13
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Øhrn FD, Lian ØB, Tsukanaka M, Röhrl SM. Early migration of a medially stabilized total knee arthroplasty : a radiostereometric analysis study up to two years. Bone Jt Open 2021; 2:737-744. [PMID: 34493056 PMCID: PMC8479839 DOI: 10.1302/2633-1462.29.bjo-2021-0115.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Aims Medial pivot (MP) total knee arthroplasties (TKAs) were designed to mimic native knee kinematics with their deep medial congruent fitting of the tibia to the femur almost like a ball-on-socket, and a flat lateral part. GMK Sphere is a novel MP implant. Our primary aim was to study the migration pattern of the tibial tray of this TKA. Methods A total of 31 patients were recruited to this single-group radiostereometric analysis (RSA) study and received a medial pivot GMK Sphere TKA. The distributions of male patients versus female patients and right versus left knees were 21:10 and 17:14, respectively. Mean BMI was 29 kg/m2 (95% confidence interval (CI) 27 to 30) and mean age at surgery was 63 years (95% CI 61 to 66). Maximum total point motions (MTPMs), medial, proximal, and anterior translations and transversal, internal, and varus rotations were calculated at three, 12, and 24 months. Patient-reported outcome measure data were also retrieved. Results MTPMs at three, 12, and 24 months were 1.0 mm (95% CI 0.8 to 1.2), 1.3 mm (95% CI 0.9 to 1.7), and 1.4 mm (0.8 to 2.0), respectively. The Forgotten Joint Score was 79 (95% CI 39 to 95) and Knee Injury and Osteoarthritis Outcome Score obtained at two years was 94 (95% CI 81 to 100), 86 (95% CI 75 to 93), 94 (95% CI 88 to 100), 69 (95% CI 48 to 88), and 81 (95% CI59 to 100) for Pain, Symptoms, Activities of Daily Living, Sport & Recreation, and Quality of Life, respectively. Conclusion In conclusion, we found that the mean increase in MTPM was lower than 0.2 mm between 12 and 24 months and thus apparently stable. Yet the GMK Sphere had higher migration at one and two years than anticipated. Based on current RSA data, we therefore cannot conclude on the long-term performance of the implant, pending further assessment. Cite this article: Bone Jt Open 2021;2(9):737–744.
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Affiliation(s)
- Frank-David Øhrn
- Kristiansund Hospital, Møre and Romsdal Health Trust, Kristiansund, Norway.,Department of Neuromedicine and Movement Science, NTNU Norwegian University of Science and Technology, Trondheim, Norway
| | - Øystein Bjerkestrand Lian
- Kristiansund Hospital, Møre and Romsdal Health Trust, Kristiansund, Norway.,Department of Neuromedicine and Movement Science, NTNU Norwegian University of Science and Technology, Trondheim, Norway
| | - Masako Tsukanaka
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Stephan Maximillian Röhrl
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Division of Orthopaedic Surgery, Oslo University Hospital, Oslo, Norway
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14
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Cacciola G, Mancino F, De Meo F, Di Matteo V, Sculco PK, Cavaliere P, Maccauro G, De Martino I. Mid-term survivorship and clinical outcomes of the medial stabilized systems in primary total knee arthroplasty: A systematic review. J Orthop 2021; 24:157-164. [PMID: 33716421 DOI: 10.1016/j.jor.2021.02.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 02/14/2021] [Indexed: 12/29/2022] Open
Abstract
Introduction Medial Pivot Total Knee Arthroplasty was introduced in clinical practice in 1990s to reproduce the in vivo-natural knee kinematics. This design is characterized by an asymmetric constraint profile, with aa highly congruent medial compartment, and a less congruent lateral compartment. Short-term outcomes of the medial pivot systems in primary knee arthroplasty have been widely reported in the current literature, however, only few studies have described results beyond 5-year follow-up. Objectives The primary objectives of this systematic review of the literature is to analyze the mid-term studies on medial pivot total knee arthroplasty focusing on the reoperation rate, survivorship and clinical outcome scores. Methods The US National Library of Medicine (PubMed/MEDLINE), EMBASE, and the Cochrane Database of Systematic Reviews were queried for publications from January 1980 to December 2019 utilizing the following keywords: "medial pivot", "medial stabilized", "medial rotating", "medial congruent", medial ball and socket", "arthroplasty", "TKA", "TKR", and "knee surgery". Results 18 articles met the inclusion criteria for the present study. The average quality was 11.4 for non-comparative studies and 21.7 for comparative studies based on MINORS criteria. A total 2832 knee arthroplasties were included for the final analysis with an average age of 69 years, and an average follow-up of 8.1 years (minimum 5 years). The overall reoperation rate was 2.4%, with periprosthetic joint infection as the leading cause of revision in 0.9% of cases, followed by aseptic loosening in 0.4% of cases. The average Knee Society Score improved to a mean preoperative score of 40.1 to a mean postoperative score of 89.2. The functional knee society score improved from a mean preoperative score of 44.8 to an average postoperative score of 82.9. The global range of motion improved from 104.8° preoperatively to 115.6° postoperatively. Conclusion We found that medial pivot system in primary total knee arthroplasty provide overall mid-term survivorship comparable to other standard implasnts. In addition, medial pivot system is associated with better high-end function compared to standard implants.
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Affiliation(s)
- Giorgio Cacciola
- GIOMI Istituto Ortopedico del Mezzogiorno d'Italia Franco Scalabrino, Ganzirri, Via Consolare Pompea, 98165, Messina, ME, Italy
| | - Fabio Mancino
- Adult Reconstruction and Joint Replacement Service, Division of Orthopaedics and Traumatology, Department of Aging, Neurological, Orthopaedic and Head-Neck Studies, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo Agostino Gemelli 8, Roma, RM, 00168, Italy.,Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, Roma, RM, 00168, Italy
| | - Federico De Meo
- GIOMI Istituto Ortopedico del Mezzogiorno d'Italia Franco Scalabrino, Ganzirri, Via Consolare Pompea, 98165, Messina, ME, Italy
| | - Vincenzo Di Matteo
- Adult Reconstruction and Joint Replacement Service, Division of Orthopaedics and Traumatology, Department of Aging, Neurological, Orthopaedic and Head-Neck Studies, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo Agostino Gemelli 8, Roma, RM, 00168, Italy.,Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, Roma, RM, 00168, Italy
| | - Peter K Sculco
- Stavros Niarchos Foundation, Complex Joint Reconstruction Center, Adult Reconstruction and Joint Replacement Division, Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70th Street, New York, NY, 10021, USA
| | - Pietro Cavaliere
- GIOMI Istituto Ortopedico del Mezzogiorno d'Italia Franco Scalabrino, Ganzirri, Via Consolare Pompea, 98165, Messina, ME, Italy
| | - Giulio Maccauro
- Adult Reconstruction and Joint Replacement Service, Division of Orthopaedics and Traumatology, Department of Aging, Neurological, Orthopaedic and Head-Neck Studies, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo Agostino Gemelli 8, Roma, RM, 00168, Italy.,Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, Roma, RM, 00168, Italy
| | - Ivan De Martino
- Adult Reconstruction and Joint Replacement Service, Division of Orthopaedics and Traumatology, Department of Aging, Neurological, Orthopaedic and Head-Neck Studies, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo Agostino Gemelli 8, Roma, RM, 00168, Italy
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15
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Webb JI, Stoner RS, Afzal I, Evans CR, Scott G, Field RE. The Medial Rotation Knee replacement: Clinical and radiological results of a multi-centre surveillance study at five years. Knee 2021; 28:247-255. [PMID: 33453513 DOI: 10.1016/j.knee.2020.12.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 09/20/2020] [Accepted: 12/21/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND The Medial Rotation Knee (MRK) has one of the lowest revision rates of total knee replacement designs in the National Joint Registry. While survival is one metric of performance of implants, patient-reported outcomes, combined with clinical and radiological evaluation, allow more complete analysis. We report the five-year results of a prospective, multi-centre surveillance study of the MRK. METHODS A 16-surgeon, three-centre series of 520 total knee replacements were performed in 486 patients, comprising 182 males and 304 females. The mean age was 70.3 years (46-96) and BMI 29.5 kg/m2 (18-57). Study subjects were given questionnaires pre-operatively, at six months, and annually thereafter. Clinical and radiological reviews were scheduled pre-operatively, at six months, three and five years. RESULTS At five years, 395 of the original 486 patients (427 of 520 knees) remained under active review. Twenty-six patients (27 knees) had withdrawn, 44 patients/knees had died and one was excluded. Thirteen patients (14 knees) were lost to follow-up, but were not revised. Seven knees were revised, equating to a survival probability of 98.6% at five years. There were significant improvements in mean Oxford Knee Score (21.23-35.79), EQ-5D (0.440-0.694) and Knee Society Score (Knee 43.00-83.97; Function 49.45-71.39). Of the radiographs available for evaluation, radiolucency was identified in 25 knees (14.6%) with one case of osteolysis of the tibial component. CONCLUSION In addition to excellent survivorship, mid-term patient-reported, clinical and radiological results at five years are satisfactory, and consistent with other medial pivot designs.
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Affiliation(s)
- Jeremy I Webb
- South West London Elective Orthopaedic Centre, Dorking Road, Epsom, Surrey KT18 7EG, United Kingdom.
| | - Rebecca S Stoner
- South West London Elective Orthopaedic Centre, Dorking Road, Epsom, Surrey KT18 7EG, United Kingdom
| | - Irrum Afzal
- South West London Elective Orthopaedic Centre, Dorking Road, Epsom, Surrey KT18 7EG, United Kingdom
| | - Chris R Evans
- The Robert Jones and Agnes Hunt Orthopaedic Hospital, Gobowen, Oswestry SY10 7AG, United Kingdom
| | - Gareth Scott
- The Royal London Hospital, Whitechapel, London E1 1BB, United Kingdom
| | - Richard E Field
- South West London Elective Orthopaedic Centre, Dorking Road, Epsom, Surrey KT18 7EG, United Kingdom
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