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Katzman JL, Buehring W, Haider MA, Connolly P, Schwarzkopf R, Fernandez-Madrid I. Clinical outcomes of patellofemoral arthroplasty: robotic assistance produces superior short and mid-term outcomes. Arch Orthop Trauma Surg 2024:10.1007/s00402-024-05263-z. [PMID: 38492064 DOI: 10.1007/s00402-024-05263-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 12/21/2023] [Indexed: 03/18/2024]
Abstract
INTRODUCTION Patellofemoral arthroplasty (PFA) has been shown to provide symptomatic improvement for isolated patellofemoral osteoarthritis (PFOA). The efficacy of robotic-assisted PFA and the most suitable PFA implant design, however, remain ongoing matters of debate. This study sought to compare clinical outcomes between patients who underwent robotic-assisted versus conventional PFAs with inlay and onlay prosthetic designs. METHODS A single-center retrospective review found 237 knees (211 patients) which underwent PFA between 2011 and 2021. One hundred eighty-four knees were included in the final analysis after cases were excluded for having indications other than osteoarthritis or having less than one year of follow-up. There were 90 conventional PFAs and 94 robotic-assisted PFAs performed. Inlay components were implanted in 89 knees and onlay components were implanted in 95 knees. Propensity score matching was utilized to address demographic differences between groups. RESULTS Overall, there was a revision-free survivorship rate of 89.7% with an average time to follow-up of 4.6 years (range 1.2 to 11.1). Twenty-nine knees (15.8%) required various non-conversion procedures. The conventional matched cohort exhibited a higher all-cause revision rate, accounting for revision PFAs and conversions to TKA, (18.8 vs. 6.4%, p = 0.014) and a shorter mean time to revision than the robotic-assisted cohort (3.1 vs. 5.8 years, p = 0.026). A Kaplan-Meier survivorship curve showed differences between the conventional and robotics cohorts (p = 0.041). All revisions following robotic-assisted PFA were caused by progression of osteoarthritis, whereas conventional PFAs also required revision due to aseptic loosening and patellar maltracking. The rate of infection resulting in irrigation and debridement was higher for conventional cases (4.3 vs. 0%, p = 0.041). No significant differences in clinical outcomes between the inlay and onlay prosthetic design matched cohorts were identified. CONCLUSION PFA is an effective treatment for addressing advanced patellofemoral arthritis. Robotic-assisted surgery may lead to improved clinical outcomes. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Jonathan L Katzman
- Department of Orthopedic Surgery, Division of Adult Reconstructive Surgery, NYU Langone Health, NYU Langone Orthopedic Hospital, 301 East 17th Street, New York, NY, 10010, USA.
| | - Weston Buehring
- Department of Orthopedic Surgery, Division of Adult Reconstructive Surgery, NYU Langone Health, NYU Langone Orthopedic Hospital, 301 East 17th Street, New York, NY, 10010, USA
| | - Muhammad A Haider
- Department of Orthopedic Surgery, Division of Adult Reconstructive Surgery, NYU Langone Health, NYU Langone Orthopedic Hospital, 301 East 17th Street, New York, NY, 10010, USA
| | - Patrick Connolly
- Department of Orthopedic Surgery, Division of Adult Reconstructive Surgery, NYU Langone Health, NYU Langone Orthopedic Hospital, 301 East 17th Street, New York, NY, 10010, USA
| | - Ran Schwarzkopf
- Department of Orthopedic Surgery, Division of Adult Reconstructive Surgery, NYU Langone Health, NYU Langone Orthopedic Hospital, 301 East 17th Street, New York, NY, 10010, USA
| | - Ivan Fernandez-Madrid
- Department of Orthopedic Surgery, Division of Adult Reconstructive Surgery, NYU Langone Health, NYU Langone Orthopedic Hospital, 301 East 17th Street, New York, NY, 10010, USA.
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Ennis HE, Phillips JLH, Jennings JM, Dennis DA. Patellofemoral Arthroplasty. J Am Acad Orthop Surg 2023; 31:1009-1017. [PMID: 37364255 DOI: 10.5435/jaaos-d-23-00022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 05/31/2023] [Indexed: 06/28/2023] Open
Abstract
Patellofemoral arthroplasty (PFA) as a treatment option for isolated patellofemoral disease continues to evolve. Enhancement in patient selection, surgical technique, implant design, and technology has led to improved short-term and midterm outcomes. Furthermore, in the setting of a younger patient with isolated patellofemoral arthritis, PFA represents an option for improved function with faster recovery times, bone preservation, maintenance of ligamentous proprioception, and the ability to delay total knee arthroplasty (TKA). The most common reason for revising PFA to a TKA is progression of tibiofemoral arthritis. In general, conversion of PFA to TKA leads to successful outcomes with minimal bone loss and the ability to use primary TKA implants and instrumentation. PFA seems to be a cost-effective alternative to TKA in appropriately selected patients with 5-, 10-PFA survivorships of 91.7% and 83.3%, respectively, and an annual revision rate of 2.18%; however, more long-term clinical studies are needed to determine how new designs and technologies affect patient outcomes and implant performance.
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Affiliation(s)
- Hayley E Ennis
- From the Colorado Joint Replacement (Ennis, Phillips, Jennings, and Dennis), Department of Mechanical and Materials Engineering, University of Denver (Jennings, and Dennis), Department of Orthopaedics, University of Colorado School of Medicine, Denver, CO (Dennis), and Department of Biomedical Engineering, University of Tennessee, Knoxville, TN (Dennis)
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Bond EC, Stauffer TP, Hendren S, Amendola A. Modern Patellofemoral Arthroplasty. JBJS Rev 2023; 11:01874474-202309000-00002. [PMID: 37656827 DOI: 10.2106/jbjs.rvw.23.00071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/03/2023]
Abstract
INTRODUCTION The ideal procedure for isolated patellofemoral arthritis is a controversial topic. Patellofemoral arthroplasty (PFA) is an option that aims to restore normal kinematics to the knee while preserving bone. PFA has been shown to have benefits compared with total knee arthroplasty (TKA) in this patient population but has historically had a high failure rate. Revision rates are improving with modern implants and tight indications but still remain higher than TKA. This review summarizes current thinking around PFA using modern implants and techniques in 2023, provides an implant-specific analysis, and assesses how we can improve outcomes after PFA based on the current literature. The aim was to provide an outline of the evidence around PFA on which surgeons can make decisions to optimize patient outcome in this young and active population. METHODS Four databases (MEDLINE, Embase, Scopus, and SPORTDiscus) were searched for concepts of patellofemoral joint arthroplasty. After abstract and text review, a screening software was used to assess articles based on inclusion criteria for studies describing indications, outcomes, and techniques for isolated PFA using modern implants, with or without concomitant procedures. RESULTS A total of 191 articles were included for further examination, with 62 articles being instructional course lectures, systematic reviews, technique articles, narrative reviews, expert opinions, or meta-analyses. The remaining articles were case reports, trials, or cohort studies. Articles were used to create a thorough outline of multiple recurrent topics in the literature. CONCLUSIONS PFA is an appealing option that has the potential to provide a more natural feeling and functioning knee for those with isolated PF arthritis. The high rate of revision is a cause for concern and there are several technical details that should be stressed to optimize results. The uncertain outcome after revision to TKA also requires more investigation. In addition, the importance of strict selection criteria and firm indications cannot be stressed enough to optimize longevity and attempt to predict those who are likely to have progression of tibiofemoral osteoarthritis. The development of new third-generation implants is promising with excellent functional outcomes and a much lower rate of maltracking and implant complications compared with earlier generations. The impact of these implants and improvement in surgical techniques on the revision rate of PFA will be determined from longer-term outcomes.
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Affiliation(s)
- Elizabeth C Bond
- Division of Orthopedic Surgery, Duke University, Durham, North Carolina
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Martínez-Sañudo B, Fornell S, Vallejo M, Domecq G. Midterm outcomes of patellofemoral arthroplasty. Rev Esp Cir Ortop Traumatol (Engl Ed) 2023; 67:T317-T323. [PMID: 36863512 DOI: 10.1016/j.recot.2023.02.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 12/20/2022] [Indexed: 03/04/2023] Open
Abstract
BACKGROUND The purpose of this study is the evaluation of the patellofemoral arthroplasty (PFA) survival and clinical and radiological outcomes in our institution. METHODS A retrospective evaluation of our institution patellofemoral arthroplasty cases from 2006 to 2018 was performed; the n sample after applying exclusion and inclusion criteria was 21. All patients excepting one were female with a median age of 63 (20-78). A Kaplan-Meier survival analysis at ten years was calculated. Informed consent was obtained from all patients prior being included in the study. RESULTS The total revision rate was 6 out of 21 patients (28.57%). The progression of the osteoarthritis in the tibiofemoral compartment was the main cause (50% of revision surgeries). The degree of satisfaction with the PFA was high, with a mean Kujala score of 70.09 and a mean OKS of 35.45 points. The VAS score improved significantly (P<.001) from a preoperative mean of 8.07 to a postoperative mean of 3.45, with an average improvement of 5 (2-8). Survival at 10 years, with revision for any reason as the endpoint, was 73.5%. A significant positive correlation between BMI and the WOMAC pain (r=.72, P<.01) and between BMI and the post-operative VAS (r=.67, P<.01) was observed. CONCLUSIONS The results of the case series under consideration suggest that PFA could be a possibility in the joint preservation surgery on the isolated patellofemoral osteoarthritis. BMI >30 seems to be a negative predictor factor in relationship with the postoperative satisfaction, increasing the pain proportionally to this index and requiring more replacement surgery than patients with BMI <30. Meanwhile the radiologic parameters of the implant are not correlated with the clinical or functional outcomes.
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Affiliation(s)
- B Martínez-Sañudo
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Virgen del Rocío, Sevilla, España.
| | - S Fornell
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Virgen del Rocío, Sevilla, España
| | - M Vallejo
- Servicio de Radiología Musculoesquelética, Hospital Virgen del Rocío, Sevilla, España
| | - G Domecq
- Servicio de Cirugía Ortopédica y Traumatología, Hospital Virgen del Rocío, Sevilla, España
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Yamawaki Y, Kuriyama S, Watanabe M, Nakamura S, Ohkoshi Y, Matsuda S. Internal Rotation, Varus, and Anterior Femoral Component Malalignments Adversely Affect Patellofemoral Joint Kinematics in Patellofemoral Arthroplasty. Arthroplast Today 2023; 21:101124. [PMID: 37012933 PMCID: PMC10066524 DOI: 10.1016/j.artd.2023.101124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 05/26/2022] [Accepted: 02/14/2023] [Indexed: 04/05/2023] Open
Abstract
Background Patellofemoral arthroplasty (PFA) is reported to provide nearly normal PF joint kinematics but only with adequate surgical techniques. This study evaluated the effects of various femoral component settings on patellar component biomechanics. Methods A dynamic musculoskeletal computer simulation analyzed normal knee and standard PFA models, as well as 8 femoral component malposition models: 5° internal or external rotation, 5° valgus or varus, 5° extension or flexion, and 3-mm or 5-mm anterior positioning. Mediolateral patellar translation, lateral patellar tilt, and contact force and stress at the PF joint were measured in each model during gait. Results The patella in the standard PFA model was shifted up to 5.0 mm laterally near heel off and was tilted up to 3.0° laterally at heel strike compared to the normal knee model. The patella in the external rotation model translated more laterally in the direction of the femoral component setting than in the standard model. However, in the internal rotation and varus alignment models, the patellar lateral shift occurred largely in the opposite direction of the femoral component setting. The patella in most models was tilted in the same direction as the femoral component setting. The PF contact force was increased, especially in the anterior femoral position models, by up to 30 MPa compared with 20 MPa in the standard model. Conclusions Internal rotation, varus, and anterior femoral component settings during PFA should be avoided to reduce postoperative complications, whereas external rotation might be appropriate only for cases with lateral patellar instability.
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Affiliation(s)
- Yusuke Yamawaki
- 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
- Corresponding author. Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan. Tel.: +81 75 751 3366.
| | - Mutsumi Watanabe
- Department of Orthopaedic Surgery, Tamatsukuri Hospital, Shimane, Japan
| | - Shinichiro Nakamura
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yasumitsu Ohkoshi
- Department of Orthopaedic Surgery, Hakodate Orthopaedic Clinic, Hakodate, Japan
| | - Shuichi Matsuda
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Reduced Early Revision Surgery and Medical Complications in Computer-assisted Knee Arthroplasty Compared With Non-computer-assisted Arthroplasty. J Am Acad Orthop Surg 2023; 31:87-96. [PMID: 36580050 DOI: 10.5435/jaaos-d-22-00596] [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: 06/20/2022] [Accepted: 10/12/2022] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Computer assistance can help surgeons achieve mechanical accurate alignment, but the clinical effect of this technology in different arthroplasty types remains controversial because of conflicting functional outcomes, revision rates, and complication rates. The goal of this study was to compare 90-day medical complications and 1 and 2-year revision surgeries after computer-assisted patellofemoral arthroplasty, unicompartmental knee arthroplasty (CA-UKA), bicompartmental knee arthroplasty (CA-BKA), and total knee arthroplasty (CA-TKA) with non-computer-assisted procedures. METHODS A retrospective cohort analysis was conducted using the Mariner data set of the PearlDiver Patient Records Database from 2010 to 2018. Current Procedural Terminology codes were used to identify patients who underwent patellofemoral arthroplasty, unicompartmental knee arthroplasty, bicompartmental knee arthroplasty, and total knee arthroplasty with or without computer assistance for osteoarthritis. All included patients were followed up for 2 years. Univariate and multivariable analyses were conducted. RESULTS On multivariable analysis, revision within 1 year was decreased in patients who underwent computer-assisted patellofemoral arthroplasty (odds ratio [OR]: 0.541, P = 0.031), CA-UKA (OR: 0.798, P = 0.019), and computer-assisted bicompartmental knee arthroplasty (OR: 0.186, P = 0.025) compared with the same surgeries without technology assistance. CA-TKA had decreased odds of revision for aseptic loosening at 2 years (OR: 0.789, P < 0.001). CA-UKA and CA-TKA had decreased risk of overall 90-day medical complications (OR: 0.838, P < 0.001; OR: 0.903, P < 0.001, respectively) and major complications (OR: 0.750, P = 0.004; OR: 0.822, P < 0.001, respectively). DISCUSSION Complication rates and revision surgeries for all arthroplasty types were equivalent or more favorable when computer assistance was used during surgery. Our results quantify some early benefits to using computer assistance in total and partial knee arthroplasties.
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Martínez-Sañudo B, Fornell S, Vallejo M, Domecq G. Midterm outcomes of patellofemoral arthroplasty. Rev Esp Cir Ortop Traumatol (Engl Ed) 2022:S1888-4415(22)00366-6. [PMID: 36574834 DOI: 10.1016/j.recot.2022.12.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 12/12/2022] [Accepted: 12/20/2022] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND The purpose of this study is the evaluation of the patellofemoral arthroplasty (PFA) survival and clinical and radiological outcomes in our institution. METHODS A retrospective evaluation of our institution patellofemoral arthroplasty cases from 2006 to 2018 was performed; the n sample after applying exclusion and inclusion criteria was 21. All patients excepting one were female with a median age of 63 (20-78). A Kaplan-Meier survival analysis at ten years was calculated. Informed consent was obtained from all patients prior being included in the study. RESULTS The total revision rate was 6 out of 21 patients (28.57%). The progression of the osteoarthritis in the tibiofemoral compartment was the main cause (50% of revision surgeries). The degree of satisfaction with the PFA was high, with a mean Kujala score of 70.09 and a mean OKS of 35.45 points. The VAS score improved significantly (p<0.001) from a preoperative mean of 8.07 to a postoperative mean of 3.45, with an average improvement of 5 (2-8). Survival at 10 years, with revision for any reason as the endpoint, was 73.5%. A significant positive correlation between BMI and the WOMAC pain (r=0.72, p<0.01) and between BMI and the post-operative VAS (r=0.67, p<0.01) was observed. CONCLUSIONS The results of the case series under consideration suggest that PFA could be a possibility in the joint preservation surgery on the isolated patellofemoral osteoarthritis. BMI >30 seems to be a negative predictor factor in relationship with the postoperative satisfaction, increasing the pain proportionally to this index and requiring more replacement surgery than patients with BMI <30. Meanwhile the radiologic parameters of the implant are not correlated with the clinical or functional outcomes.
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Affiliation(s)
- B Martínez-Sañudo
- Department of Orthopaedic Surgery, Virgen del Rocío Hospital, C/ Manuel Siurot s/n, 41013 Sevilla, Spain.
| | - S Fornell
- Department of Orthopaedic Surgery, Virgen del Rocío Hospital, C/ Manuel Siurot s/n, 41013 Sevilla, Spain
| | - M Vallejo
- Department of Musculoskeletal Radiology, Virgen del Rocío Hospital, C/ Manuel Siurot s/n, 41013 Sevilla, Spain
| | - G Domecq
- Department of Orthopaedic Surgery, Virgen del Rocío Hospital, C/ Manuel Siurot s/n, 41013 Sevilla, Spain
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Saffarini M, Müller JH, La Barbera G, Hannink G, Cho KJ, Toanen C, Dejour D. Inadequacy of computed tomography for pre-operative planning of patellofemoral arthroplasty. Knee Surg Sports Traumatol Arthrosc 2018; 26:1485-1492. [PMID: 28271370 DOI: 10.1007/s00167-017-4474-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 02/08/2017] [Indexed: 10/20/2022]
Abstract
PURPOSE To evaluate the accuracy of preoperative planning for patellofemoral arthroplasty (PFA) by comparing: (1) virtual implant positioning simulated on pre-operative images versus (2) real implant positioning from post-operative images. METHODS The authors prospectively studied 15 patients that received a PFJ implant (Tornier, Montbonnot France). A pre-operative planning software was established to determine the size and position of the trochlear component. Pre-operative scans were used to perform virtual implantations by two different operators, which were then compared to the post-operative scans to calculate errors (ε) in implant positioning and intra-class correlation coefficients (ICC) for intra- and inter-observer repeatability. RESULTS Analysis was performed for 13 patients, for whom agreement between virtual and real surgery was excellent for anteroposterior (AP) position (ICC = 0.84; ε max = 3.5 mm), fair for proximodistal (PD) position (ICC = 0.50; ε max = 9.5 mm), and poor for mediolateral (ML) position (ICC = 0.07; ε max = 9.0 mm). It was fair for flexum-recurvatum (FR) alignment (ICC = 0.53; ε max = 8.2°), poor for varus-valgus (VV) alignment (ICC = 0.34; ε max = 10.0°), and internal-external (IE) rotation (ICC = 0.34; ε max = 10.6°). CONCLUSIONS Pre-operative planning was insufficiently accurate to follow intra-operatively, the greatest errors being angular alignment (VV and FR). The clinical relevance of these findings is that PFA is difficult to plan pre/operatively due to non-visibility of cartilage on CT scans and to trochlear dysplasia in most cases. LEVEL OF EVIDENCE Prospective evaluation of operative tools on consecutive patients, Level III.
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Affiliation(s)
- Mo Saffarini
- ReSurg SA, 35 ch. de la Vuarpillière, 1260, Nyon, Switzerland.
| | - Jacobus H Müller
- Department of Mechanical and Mechatronic Engineering Stellenbosch University, Private Bag X1, Matieland, 7600, Stellenbosch, South Africa
| | - Giuseppe La Barbera
- Lyon-Ortho-Clinic, Clinique de la Sauvegarde, 8 Avenue Ben Gourion, 69009, Lyon, France
| | - Gerjon Hannink
- Orthopaedic Research Laboratory, Radboud University Medical Center, PO Box 9101, 6500HB, Nijmegen, The Netherlands
| | - Kyung Jin Cho
- Department of Mechanical and Mechatronic Engineering Stellenbosch University, Private Bag X1, Matieland, 7600, Stellenbosch, South Africa
| | - Cécile Toanen
- Lyon-Ortho-Clinic, Clinique de la Sauvegarde, 8 Avenue Ben Gourion, 69009, Lyon, France
| | - David Dejour
- Lyon-Ortho-Clinic, Clinique de la Sauvegarde, 8 Avenue Ben Gourion, 69009, Lyon, France
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Cuthbert R, Tibrewal S, Tibrewal SB. Patellofemoral arthroplasty: Current concepts. J Clin Orthop Trauma 2018; 9:24-28. [PMID: 29628679 PMCID: PMC5884050 DOI: 10.1016/j.jcot.2017.11.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 11/20/2017] [Indexed: 11/29/2022] Open
Abstract
Isolated patellofemoral arthritis (IPA) is a debilitating condition characterised by a loss of articular cartilage on the patella facets, the trochlear groove or both. By definition, patients with IPA must have normal cartilage in the tibiofemoral compartments of their knee. It is therefore logical to pursue arthroplasty which corrects the abnormality while sparing healthy bone and preserving the knee's native kinematics, which is the premise underpinning patellofemoral arthroplasty (PFA). However, its use remains controversial, with many surgeons still favouring total knee replacement (TKR) in these patients. This paper provides a comprehensive review of PFA in the literature to date and concludes, in carefully selected patients, PFA is worthy of consideration as a functionally superior and economically beneficial joint-preserving procedure - delaying TKR until implant failure or tibiofemoral osteoarthritis progression.
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Affiliation(s)
- Rory Cuthbert
- Department of Trauma & Orthopaedic Surgery, Lewisham & Greenwich NHS Trust, University Hospital Lewisham, Lewisham High Street, London, SE13 6LH, United Kingdom
| | - Saket Tibrewal
- Department of Trauma & Orthopaedic Surgery, Lewisham & Greenwich NHS Trust, University Hospital Lewisham, Lewisham High Street, London, SE13 6LH, United Kingdom,Corresponding author.
| | - Sheo B. Tibrewal
- Department of Trauma & Orthopaedic Surgery, Lewisham & Greenwich NHS Trust, Queen Elizabeth Hospital, London, SE18 4QH, United Kingdom
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Survivorship and functional outcomes of patellofemoral arthroplasty: a systematic review. Knee Surg Sports Traumatol Arthrosc 2017; 25:2622-2631. [PMID: 26590562 DOI: 10.1007/s00167-015-3878-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 11/10/2015] [Indexed: 02/07/2023]
Abstract
PURPOSE Historically poor results of survivorship and functional outcomes of patellofemoral arthroplasty (PFA) have been reported in the setting of isolated patellofemoral osteoarthritis. More recently, however, fairly good results of PFA were reported, but the current status of PFA outcomes is unknown. Therefore, a systematic review was performed to assess overall PFA survivorship and functional outcomes. METHODS A search was performed using PubMed, Embase and Cochrane systems, and the registries were searched. Twenty-three cohort studies and one registry reported survivorship using Kaplan-Meier curve, while 51 cohort studies reported functional outcomes of PFA. RESULTS Twelve studies were level II studies, while 45 studies were level III or IV studies. Heterogeneity was mainly seen in type of prosthesis and year the cohort started. Nine hundred revisions in 9619 PFAs were reported yielding 5-, 10-, 15- and 20-year PFA survivorships of 91.7, 83.3, 74.9 and 66.6 %, respectively, and an annual revision rate of 2.18. Functional outcomes were reported in 2587 PFAs with an overall score of 82.2 % of the maximum score. KSS and Knee Function Score were 87.5 and 81.6 %, respectively. CONCLUSION This systematic review showed that fairly good results of PFA survivorship and functional outcomes were reported at short- and midterm follow-up in the setting of isolated patellofemoral osteoarthritis. Heterogeneity existed mainly in prosthesis design and year the cohort started. CLINICAL RELEVANCE These results provide a clear overview of the current status of PFA in the setting of isolated patellofemoral osteoarthritis. LEVEL OF EVIDENCE IV.
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Annual revision rates of partial versus total knee arthroplasty: A comparative meta-analysis. Knee 2017; 24:179-190. [PMID: 27916580 DOI: 10.1016/j.knee.2016.11.006] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 10/29/2016] [Accepted: 11/07/2016] [Indexed: 02/02/2023]
Abstract
BACKGROUND Utilization of unicompartmental knee arthroplasty (UKA) and patellofemoral arthroplasty (PFA) as alternatives to total knee arthroplasty (TKA) for unicompartmental knee osteoarthritis (OA) has increased. However, no single resource consolidates survivorship data between TKA and partial resurfacing options for each variant of unicompartmental OA. This meta-analysis compared survivorship between TKA and medial UKA (MUKA), lateral UKA (LUKA) and PFA using annual revision rate as a standardized metric. METHODS A systematic literature search was performed for studies quantifying TKA, MUKA, LUKA and/or PFA implant survivorship. Studies were classified by evidence level and assessed for bias using the MINORS and PEDro instruments. Annual revision rates were calculated for each arthroplasty procedure as percentages/observed component-year, based on a Poisson-normal model with random effects using the R-statistical software package. RESULTS One hundred and twenty-four studies (113 cohort and 11 registry-based studies) met inclusion/exclusion criteria, providing data for 374,934 arthroplasties and 14,991 revisions. The overall evidence level was low, with 96.7% of studies classified as level III-IV. Annual revision rates were lowest for TKA (0.49%, CI 0.41 to 0.58), followed by MUKA (1.07%, CI 0.87 to 1.31), LUKA (1.13%, CI 0.69 to 1.83) and PFA (1.75%, CI 1.19 to 2.57). No difference was detected between revision rates for MUKA and LUKA (p=0.222). CONCLUSIONS Revisions of MUKA, LUKA and PFA occur at an annual rate of 2.18, 2.31 and 3.57-fold that of TKA, respectively. These estimates may be used to inform clinical decision-making, guide patient expectations and evaluate the cost-effectiveness of total versus partial knee replacement in the setting of unicompartmental OA.
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van der List JP, Chawla H, Villa JC, Pearle AD. Why do patellofemoral arthroplasties fail today? A systematic review. Knee 2017; 24:2-8. [PMID: 27825938 DOI: 10.1016/j.knee.2015.11.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 11/13/2015] [Accepted: 11/15/2015] [Indexed: 02/02/2023]
Abstract
BACKGROUND Historically poor results of patellofemoral arthroplasty (PFA) were reported in the setting of isolated patellofemoral osteoarthritis (OA). In order to lower PFA failure rates, it is important to identify failure modes using a standardized method. In this systematic review, PFA failure modes were assessed and compared in early vs. late failures and older vs. recent studies. METHODS Databases of PubMed, Embase and Cochrane and annual registries were searched for studies reporting PFA failures. Failure modes in studies with mean follow-up <5years were classified as early failures while >5years were classified late failures. Cohorts started before 2000 were classified as older studies and started after 2000 as recent studies. RESULTS Thirty-nine cohort studies (10 level II and 29 level III or IV studies) and three registries were included with overall low quality of studies (GRADE criteria). A total of 938 PFA failures were included and were caused by OA progression (38%), pain (16%), aseptic loosening (14%) and patellar maltracking (10%). Pain was responsible for most early failures (31%), while OA progression was most common in late failures (46%). In older studies, OA progression was more commonly reported as failure mode than in more recent studies (53% vs. 39%, p=0.005). CONCLUSION This level IV systematic review with low quality of studies identified OA progression and pain as major failure modes. Reviewing these studies, appropriate patient selection could prevent PFA failures in select cases. Future studies assessing the role of PFA in isolated patellofemoral OA are necessary.
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Affiliation(s)
- J P van der List
- Computer Assisted Surgery Center, Department of Orthopaedic Surgery, Hospital for Special Surgery, Weill Medical College of Cornell University, New York, NY, USA.
| | - H Chawla
- Computer Assisted Surgery Center, Department of Orthopaedic Surgery, Hospital for Special Surgery, Weill Medical College of Cornell University, New York, NY, USA.
| | - J C Villa
- Computer Assisted Surgery Center, Department of Orthopaedic Surgery, Hospital for Special Surgery, Weill Medical College of Cornell University, New York, NY, USA.
| | - A D Pearle
- Computer Assisted Surgery Center, Department of Orthopaedic Surgery, Hospital for Special Surgery, Weill Medical College of Cornell University, New York, NY, USA.
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Confalonieri N, Biazzo A, Cerveri P, Pullen C, Manzotti A. Navigated "small implants" in knee reconstruction. Knee Surg Sports Traumatol Arthrosc 2016; 24:3507-3516. [PMID: 27631647 DOI: 10.1007/s00167-016-4324-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 09/07/2016] [Indexed: 11/25/2022]
Abstract
PURPOSE At the beginning of this century, unprecedented interest in the concept of using less invasive approaches for the treatment of knee degenerative diseases was ignited. Initial interest in this approach was about navigated and non-navigated knee reconstruction using small implants and conventional total knee arthroplasty. METHODS To this end, a review of the published literature relating to less invasive compartmental arthroplasty of the knee using computer-based alignment techniques and on soft tissue-dedicated small implants is presented. The authors present and compare their personal results using these techniques with those reported in the current literature. These involved the use of a shorter incision and an emphasis sparing. However, nowadays most surgeons look at compartmental knee resurfacing with the use of small implants as the new customized approach for younger and higher-demand patients. The aim of this paper is to stimulate further debate. RESULTS Since the beginning of 2000, computer-assisted surgery has been applied to total knee arthroplasty (TKA) and later to compartmental knee arthroplasty. Recent studies in the literature have reported better implant survivorship for younger patients using navigation in TKA at longer-term follow-up. Only one published report was identified showing superior clinical outcomes at short-term follow-up using computer-assisted technology compared with conventional alignment techniques in small implant surgery. No studies were found in the literature that demonstrated similar clinical advantages with navigated small implants at long-term follow-up. Two published meta-analyses were identified reporting better implant and limb alignment and no increase in complications using a navigated unicompartmental knee arthroplasty. However, neither meta-analysis showed superior clinical outcomes or survivorship with the navigated techniques. CONCLUSION In conclusion, we can assert that replacing just the damaged compartment and preserving the normal biomechanics will require not only new implant designs but also new technologies allowing the surgeon to make extremely precise adjustments to implant alignment and providing continuous feedback during surgery. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Norberto Confalonieri
- 1st Orthopaedic and Trauma Department, CTO Hospital, ASST G. Pini-CTO, Milan, Italy.
| | - Alessio Biazzo
- 1st Orthopaedic and Trauma Department, CTO Hospital, ASST G. Pini-CTO, Milan, Italy
| | - Pietro Cerveri
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20100, Milan, Italy
| | - Chris Pullen
- Orthopaedic Department, Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Alfonso Manzotti
- Orthopaedic and Trauma Department, "Luigi Sacco" Hospital, ASST FBF-Sacco, Milan, Italy
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A 21 % conversion rate to total knee arthroplasty of a first-generation patellofemoral prosthesis at a mean follow-up of 9.7 years. INTERNATIONAL ORTHOPAEDICS 2015; 39:1857-64. [DOI: 10.1007/s00264-015-2941-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 06/24/2015] [Indexed: 10/23/2022]
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Abstract
Successful outcomes after orthopedic surgical procedures are believed to be highly dependent on reproducible anatomic accuracy. Immediate intraoperative feedback helps surgeons to achieve this accuracy as has been demonstrated with the use of fluoroscopy. Non-image-based computer navigation has been used in joint arthroplasty, anterior cruciate ligament reconstruction, high tibial osteotomy, and cartilage procedures along with applications in hip and shoulder arthroscopy. Most short-term studies have demonstrated superior accuracy when compared with conventional techniques; however, very few studies have shown better clinical outcomes. Robotic-assisted surgery has been most popular in total and unicompartmental arthroplasty, which again has greater accuracy but similar clinical outcomes when compared with conventional techniques. Economic analyses indicate that these high-cost technologies may only be cost-effective in high-volume centers. Other studies have shown that computer navigation improves the accuracy of lower volume surgeons to a greater degree than higher volume surgeons allowing the former to have results similar to the latter.
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