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Klasan A, Anelli-Monti V, Putnis S, Neri T, Smekal V, Kammerlander C. Trochlea morphology demonstrates variability but no gender difference in osteoarthritic patients undergoing total knee arthroplasty. Knee 2024; 49:79-86. [PMID: 38876083 DOI: 10.1016/j.knee.2024.06.002] [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: 02/24/2024] [Revised: 03/23/2024] [Accepted: 06/03/2024] [Indexed: 06/16/2024]
Abstract
BACKGROUND In recent years, coronal lower leg alignment has received significant attention. Two classifications recently described the variability in both femoral and tibial morphology, resulting in differing native lower limb alignment. The native trochlea and the variability in morphology has received less attention. METHODS This is a prospective cohort study of 200 patients undergoing robotically assisted TKA. Preoperative transverse CT scans were used to determine the posterior condylar axis (PCA), transepicondylar axis (TEA), lateral trochlear inclination (LTI), the sulcus angle (SA) and the anterior trochlear line (ATL). Outliers were defined as values > 1.5 IQR from median value. Trochlea dysplasia was defined as LTI < 12°. Gender differences were compared. RESULTS In total, 99 patients were female (49.4%). SA had a median of 137.0° (IQR 12°), ATL 4° (IQR 4), LTI 18° (IQR 7°). Median TEA-PCA was 5° external (IQR 3°). There were 5.0% outliers in SA, 3.0% of outliers in ATL, 3.5% outliers in LTI and 4.5% outliers in the TEA-PCA. Trochlear dysplasia was present in 11.5% of the measurements. There was no difference in any of the angles between the genders. CONCLUSION The present study demonstrates no difference in trochlea morphology between the genders, rather a significant number of overall outliers in trochlear morphology. Larger cohorts but also, more investigations, are needed to better understand the trochlear morphology of patients undergoing total knee arthroplasty. The personalized alignment strategies and implants need to account for this variability in the population.
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Affiliation(s)
- Antonio Klasan
- AUVA UKH Steiermark, Graz, Austria; Johannes Kepler University Linz, Austria.
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Zhou X, Jiang Y, Chen D, Chen T, Tian Z. Does Patellar Denervation with Electrocautery Benefits for Total Knee Arthroplasty without Patellar Resurfacing: A Meta-analysis of Randomized Controlled Trails. Orthop Surg 2024; 16:1832-1848. [PMID: 38951735 PMCID: PMC11293931 DOI: 10.1111/os.14161] [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: 01/30/2024] [Revised: 06/15/2024] [Accepted: 06/16/2024] [Indexed: 07/03/2024] Open
Abstract
To investigate the effects of patellar denervation (PD) and non-patellar denervation (NPD) after primary total knee arthroplasty (TKA) without patellar resurfacing, this study conducted systematic electronic searches in November 2023 using PubMed, Embase, Web of Science, Cochrane, and Scopus, adhering to Cochrane Collaboration recommendations. Only randomized controlled trials (RCTs) were included. Additionally, a manual search was performed to identify potentially eligible studies from the reference lists of review articles. Two researchers independently conducted literature reviews, data extraction, and risk of bias assessments. The outcome analysis encompassed the incidence of anterior knee pain (AKP), visual analogue scale (VAS), range of motion (ROM), American Knee Society Score (KSS), Oxford Knee Score (OKS), patellar score (PS), complications, and reoperations. Meta-analysis was executed using RevMan 5.3 software. To enhance the credibility of the study, TSA v0.9 software was utilized to perform power analysis on the overall efficacy of primary and secondary outcomes. Twelve studies involving 1745 patients (1587 knees) were included, with 852 undergoing PD and 893 undergoing NPD. Results indicated a superior reduction in AKP incidence in the PD group compared to the NPD group. Statistically significant differences were observed between PD and NPD in KSS, OKS, and PS. However, the upper limit of the 95% confidence interval for each outcome fell below the minimal clinically important difference (MCID). No significant differences were found in VAS and ROM between PD and NPD. Additionally, PD was not associated with an increased incidence of complications or reoperations. Within 12 months and beyond, PD was proven to be a beneficial intervention in reducing AKP following TKA without patellar resurfacing, achieved without an increase in complications or reoperations. Regarding KSS, OKS, and PS, the minimal advantage achievable through PD may not be clinically significant.
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Affiliation(s)
- Xiang Zhou
- Department of Articular and Traumatic Orthopedic SurgeryThe Fourth People's Hospital of GuiyangGuiyangChina
| | - Yulin Jiang
- Department of Articular and Traumatic Orthopedic SurgeryThe Fourth People's Hospital of GuiyangGuiyangChina
| | - Debin Chen
- Department of Articular and Traumatic Orthopedic SurgeryThe Fourth People's Hospital of GuiyangGuiyangChina
| | - Tao Chen
- Department of Articular and Traumatic Orthopedic SurgeryThe Fourth People's Hospital of GuiyangGuiyangChina
| | - Zhiyong Tian
- Department of Articular and Traumatic Orthopedic SurgeryThe Fourth People's Hospital of GuiyangGuiyangChina
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3
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Bonnin M, Saffarini M, Lustig S, Hirschmann MT. Decoupling the trochlea from the condyles in total knee arthroplasty: The end of a curse? Knee Surg Sports Traumatol Arthrosc 2024; 32:1645-1649. [PMID: 38769816 DOI: 10.1002/ksa.12267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 04/29/2024] [Accepted: 05/08/2024] [Indexed: 05/22/2024]
Affiliation(s)
- Michel Bonnin
- Centre Orthopédique Santy, Hôpital Privé Jean Mermoz, Ramsay Santé, Lyon, France
| | | | - Sébastien Lustig
- Department of Orthopedic Surgery and Traumatology, Kantonsspital Baselland, Bruderholz, Switzerland
| | - Michael T Hirschmann
- Département de chirurgie orthopédique et de médecine du sport, FIFA Medical Center of excellence, Hôpital de la Croix-Rousse, Centre Hospitalier Universitaire de Lyon, Lyon, France-Univ Lyon, Université Claude Bernard Lyon 1, IFSTTAR, LBMC UMR, Lyon, France
- Department of Clinical Research, Research Group Michael T. Hirschmann, Regenerative Medicine & Biomechanics, University of Basel, Basel, Switzerland
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Lachowski K, Prill R, Salzmann M, Becker R. Inferior patellar mobility before and after knee arthroplasty: A comparison with healthy knees. Knee Surg Sports Traumatol Arthrosc 2024; 32:1531-1538. [PMID: 38544470 DOI: 10.1002/ksa.12159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 03/08/2024] [Accepted: 03/11/2024] [Indexed: 05/31/2024]
Abstract
PURPOSE The aim of this study was to evaluate patellar mobility in patients before and after knee arthroplasty (KA) and compare it with that of healthy subjects. It was hypothesised that patellar mobility is diminished in patients with osteoarthritis (OA) and remains unchanged after KA. METHODS A total of 101 patients (59 females and 42 males) with a mean age of 70.9 ± 9.9 years underwent KA and were compared with 25 healthy individuals (seven females and 18 males) with a mean age of 32.3 ± 9.3 years. Mediolateral patellar displacement was measured by applying a force of 10 N, and the medial and lateral patellar shifts were recorded separately using a validated novel patellostabilometer. Patients were examined preoperatively and at 3 months postoperatively, assessing the range of knee motion and the clinical and functional status based on the Oxford Knee Score (OKS), Kujala Score, subjective Knee Society Score (sKSS), Forgotten Joint Score (FJS) and Western Ontario and McMaster Universities Arthritis Index (WOMAC). RESULTS Total patellar displacement was 42.1 ± 6 mm for healthy subjects, 31 ± 6 mm before surgery and 32.8 ± 7.8 mm after surgery in osteoarthritic patients (p < 0.01). The mean lateral patellar shift differed significantly between healthy individuals (17.9 ± 4 mm) and osteoarthritic patients (15.1 ± 6 mm) (p < 0.01). The mean medial patellar mobility of healthy individuals (24.2 ± 7 mm) was significantly greater than that of osteoarthritic patients (15.8 ± 4.8 mm) (p < 0.01). All scores improved significantly postoperatively. No correlation was found between patellar mobility and OKS, Kujala Score, sKSS, FJS and WOMAC (r = -0.11). Improvement in patellar mobility also showed no correlation with clinical outcomes according to OKS, Kujala Score, sKSS, FJS and WOMAC (r = 0.08). CONCLUSION This study has demonstrated reduced patellar mobility in patients with OA. While patellar mobility significantly improved after KA, it may not hold clinical significance (p = 0.04). No impact on clinical outcome can be expected when the presurgical patella mobility is preserved in KA. LEVEL OF EVIDENCE Level IV.
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Affiliation(s)
- Krzysztof Lachowski
- Department of Orthopaedics and Traumatology, Brandenburg Medical School Theodor Fontane, University Hospital Brandenburg/Havel, Brandenburg, Germany
| | - Robert Prill
- Department of Orthopaedics and Traumatology, Brandenburg Medical School Theodor Fontane, University Hospital Brandenburg/Havel, Brandenburg, Germany
- Faculty of Health Science Brandenburg, Brandenburg Medical School Theodor Fontane, Potsdam, Germany
| | - Mikhail Salzmann
- Department of Orthopaedics and Traumatology, Brandenburg Medical School Theodor Fontane, University Hospital Brandenburg/Havel, Brandenburg, Germany
| | - Roland Becker
- Department of Orthopaedics and Traumatology, Brandenburg Medical School Theodor Fontane, University Hospital Brandenburg/Havel, Brandenburg, Germany
- Faculty of Health Science Brandenburg, Brandenburg Medical School Theodor Fontane, Potsdam, Germany
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Alamino LP, Garabano G, Pesciallo CÁ, Del Sel H. Bilateral simultaneous total knee arthroplasty with and without patellar resurfacing. A prospective single surgeon series with a minimum follow-up of 7 years. Knee Surg Relat Res 2024; 36:21. [PMID: 38812052 PMCID: PMC11138002 DOI: 10.1186/s43019-024-00225-6] [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: 01/03/2024] [Accepted: 05/19/2024] [Indexed: 05/31/2024] Open
Abstract
BACKGROUND Total knee arthroplasty (TKA) is the most effective treatment for end-stage adult knee osteoarthritis, but it has been reported that patient satisfaction may vary. A malfunction of the patellofemoral joint may produce anterior knee pain (AKP) for several reasons. While some surgeons systematically resurface the patella despite the risk of potential complications such as fracture, loosening, or wear of the patella, others prefer to preserve it to reduce AKP and revision rates. This study aimed to evaluate whether patellar resurfacing had better clinical and functional outcomes, complications, and revision rates in patients undergoing simultaneous bilateral total knee arthroplasty. METHODS We conducted a prospective cohort study, including patients who underwent bilateral simultaneous TKA in which the patella was replaced in one knee and preserved in the other, with a minimum follow-up of 7 years. We assessed clinical and functional outcomes with the Knee Society Score (KSS) and Visual Analogue Scale (VAS); complications and revision rates were also registered. RESULTS The final series consisted of 43 patients with 86 knee arthroplasties. After a mean of 7.6 years of follow-up, no significant differences were found regarding KSS (clinical: 82.8 ± 7.4 versus 83.2 ± 3.4, p = 0.92; functional 89.1 ± 8.2: versus 90.4 ± 6.8; p = 0.99), VAS (2.0 ± 0.9 versus 1.8 ± 1.0; p = 0.84), complications (10.5% versus 8.1%; p = 0.57), or revision rates (2.3% versus 2.3%; p = 0.99) when comparing patellar resurfacing versus retention. CONCLUSION In the context of total knee arthroplasty, patellar replacement did not demonstrate statistically significant differences concerning patellar retention in clinical nor functional outcomes, AKP, complications, or revision rates after a minimum of 7 years of follow-up.
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Affiliation(s)
- Leonel Perez Alamino
- Department of Orthopaedics and Traumatology, British Hospital of Buenos Aires, Perdriel 74, C1280 AEB, Buenos Aires, Argentina.
| | - German Garabano
- Department of Orthopaedics and Traumatology, British Hospital of Buenos Aires, Perdriel 74, C1280 AEB, Buenos Aires, Argentina
| | - Cesar Ángel Pesciallo
- Department of Orthopaedics and Traumatology, British Hospital of Buenos Aires, Perdriel 74, C1280 AEB, Buenos Aires, Argentina
| | - Hernán Del Sel
- Department of Orthopaedics and Traumatology, British Hospital of Buenos Aires, Perdriel 74, C1280 AEB, Buenos Aires, Argentina
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Michaud F, Mouzo F, Dopico D, Cuadrado J. A Sensorized 3D-Printed Knee Test Rig for Preliminary Experimental Validation of Patellar Tracking and Contact Simulation. SENSORS (BASEL, SWITZERLAND) 2024; 24:3042. [PMID: 38793897 PMCID: PMC11125272 DOI: 10.3390/s24103042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/03/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024]
Abstract
Experimental validation of computational simulations is important because it provides empirical evidence to verify the accuracy and reliability of the simulated results. This validation ensures that the simulation accurately represents real-world phenomena, increasing confidence in the model's predictive capabilities and its applicability to practical scenarios. The use of musculoskeletal models in orthopedic surgery allows for objective prediction of postoperative function and optimization of results for each patient. To ensure that simulations are trustworthy and can be used for predictive purposes, comparing simulation results with experimental data is crucial. Although progress has been made in obtaining 3D bone geometry and estimating contact forces, validation of these predictions has been limited due to the lack of direct in vivo measurements and the economic and ethical constraints associated with available alternatives. In this study, an existing commercial surgical training station was transformed into a sensorized test bench to replicate a knee subject to a total knee replacement. The original knee inserts of the training station were replaced with personalized 3D-printed bones incorporating their corresponding implants, and multiple sensors with their respective supports were added. The recorded movement of the patella was used in combination with the forces recorded by the pressure sensor and the load cells, to validate the results obtained from the simulation, which was performed by means of a multibody dynamics formulation implemented in a custom-developed library. The utilization of 3D-printed models and sensors facilitated cost-effective and replicable experimental validation of computational simulations, thereby advancing orthopedic surgery while circumventing ethical concerns.
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Affiliation(s)
- Florian Michaud
- Laboratory of Mechanical Engineering, Centro de Investigación en Tecnologías Navales e Industriales (CITENI), Campus Industrial de Ferrol, University of La Coruña, 15403 Ferrol, Spain; (F.M.); (D.D.); (J.C.)
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Cheppalli NS, Purudappa PP, Price R, Kolwadkar Y, Metikala S. Isolated lateral-sided knee pain in total knee arthroplasty. A review. Orthop Rev (Pavia) 2024; 16:93014. [PMID: 38505137 PMCID: PMC10950199 DOI: 10.52965/001c.93014] [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: 07/10/2023] [Accepted: 01/08/2024] [Indexed: 03/21/2024] Open
Abstract
Isolated lateral-sided knee pain is a unique problem following total knee arthroplasty (TKA). Reported causes include soft tissue impingement against extruded cement, an overhanging tibial tray, remnant osteophytes rubbing against the iliotibial band (ITB), popliteal tendon impingement, fabella syndrome, and synovial tissue impingement in the lateral gutter. In addition, iliotibial band traction syndrome secondary to guided motion Bi-cruciate stabilizing knee arthroplasty has been recognized as a new clinical entity. Initial work up should include ruling out the most common causes of painful TKA including infection, aseptic loosening, and instability. Radiographs and CT scan are utilized to identify potential source of pain. Ultrasound evaluation (with elicited probe tenderness) can increase diagnostic accuracy. Ultrasound guided local anesthetic injections can confirm the source of pain. Anti-inflammatory medications, physical therapy with ITB stretches, and therapeutic local steroid injections are initial treatment modalities. Satisfactory resolution of symptoms may require surgical intervention directed at the specific cause and may avoid the morbidity associated with revision TKA.
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Affiliation(s)
| | | | - Ryan Price
- Orthopedic Surgery University of New Mexico School of Medicine
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8
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Picart B, Scaltsas A, Pujol N. Patellar resurfacing might not be mandatory in contralateral second total knee replacement even if performed during replacement of the first knee. Orthop Traumatol Surg Res 2024:103857. [PMID: 38447776 DOI: 10.1016/j.otsr.2024.103857] [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: 01/14/2023] [Revised: 10/23/2023] [Accepted: 02/06/2024] [Indexed: 03/08/2024]
Abstract
INTRODUCTION The appropriateness or necessity of patellar resurfacing in total knee arthroplasty (TKA) is not clearly established. The objective of the present study was to compare the clinical and functional results of patients with bilateral involvement, operated on in one knee by TKA with patellar resurfacing and in the other knee by TKA without resurfacing. The hypothesis was that there was no difference in results between the two sides. METHOD This was a retrospective cohort of patients operated on by TKA without patellar resurfacing in a second osteoarthritic knee after contralateral TKA with patellar resurfacing. Twenty consecutive patients who underwent second primary TKA constituted their own control group (40 knees). Iwano scores were comparable. Mean age was 75.9±6.2years. Mean time between the two procedures was 20.6±11.9months. RESULTS There were no differences in SF-36, KOOS or Lille patellofemoral scores between the right and left knees. Sixty-five percent of patients were unable to differentiate the performance of their knees in activities of daily living. CONCLUSION The present study did not differentiate results according to patellar resurfacing, showing the limitations of resurfacing for early functional gain after primary TKA. Resurfacing might thus not be essential, even if it was performed in replacement of the first knee. LEVEL OF EVIDENCE IV; retrospective cohort study.
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Affiliation(s)
- Baptiste Picart
- Service de Chirurgie Orthopédique, Centre Hospitalier de Versailles, 177, rue de Versailles, 78150 Le Chesnay, France
| | - Angelos Scaltsas
- Service de Chirurgie Orthopédique, Centre Hospitalier de Versailles, 177, rue de Versailles, 78150 Le Chesnay, France
| | - Nicolas Pujol
- Service de Chirurgie Orthopédique, Centre Hospitalier de Versailles, 177, rue de Versailles, 78150 Le Chesnay, France.
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Michaud F, Luaces A, Mouzo F, Cuadrado J. Use of patellofemoral digital twins for patellar tracking and treatment prediction: comparison of 3D models and contact detection algorithms. Front Bioeng Biotechnol 2024; 12:1347720. [PMID: 38481569 PMCID: PMC10935559 DOI: 10.3389/fbioe.2024.1347720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 02/13/2024] [Indexed: 03/17/2024] Open
Abstract
Introduction: Poor patellar tracking can result in painful contact pressures, patella subluxation, or dislocation. The use of musculoskeletal models and simulations in orthopedic surgeries allows for objective predictions of post-treatment function, empowering clinicians to explore diverse treatment options for patients. Although a promising approach for managing knee surgeries, the high computational cost of the Finite Element Method hampers its clinical usability. In anticipation of minimal elastic deformations in the involved bodies, the exploration of the Multibody Dynamics approach emerged as a viable solution, providing a computationally efficient methodology to address clinical concerns related to the knee joint. Methods: This work, with a focus on high-performance computing, achieved the simulation of the patellofemoral joint through rigid-body multibody dynamics formulations. A comparison was made between two collision detection algorithms employed in the simulation of contact between the patellar and femoral implants: a generic mesh-to-mesh collision detection algorithm, which identifies potential collisions between bodies by checking for proximity or overlap between their discretized mesh surface elements, and an analytical contact algorithm, which uses a mathematical model to provide closed-form solutions for specific contact problems, but cannot handle arbitrary geometries. In addition, different digital twins (3D model geometries) of the femoral implant were compared. Results: Computational efficiency was considered, and histories of position, orientation, and contact force of the patella during the motion were compared with experimental measurements obtained from a sensorized 3D-printed test bench under pathological and treatment scenarios. The best results were achieved through a purely analytical contact detection algorithm, allowing for clinical usability and optimization of clinical outcomes.
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Affiliation(s)
- Florian Michaud
- Laboratory of Mechanical Engineering, CITENI, Campus Industrial de Ferrol, University of La Coruña, Ferrol, Spain
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Tsivelekas K, Pallis D, Lykos S, Triantafyllou E, Nikolakakos P, Tilentzoglou A, Papadakis SA. Patella Fracture After Total Knee Arthroplasty: A Review. Cureus 2024; 16:e53281. [PMID: 38435881 PMCID: PMC10905318 DOI: 10.7759/cureus.53281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2024] [Indexed: 03/05/2024] Open
Abstract
The management and underlying causes of patellar periprosthetic fractures (PPF) after total knee arthroplasty (TKA) constitute an issue of growing importance given the rising frequency of these procedures. Patella periprosthetic fractures, though relatively rare, pose significant challenges and are a frequent indication for revision surgeries. Despite a decrease in overall incidence, PPFs remain the second most common type of periprosthetic fractures after TKA. Several factors have been identified and associated with patient-specific factors, surgical technique errors, and implant-related causes. Currently extensor apparatus integrity, bone stock, and component loosening are the major concerns and indications for the selective treatment approach. In this study, a thorough review of the existing literature was performed summarizing the epidemiology, clinical manifestation, treatment approach, and functional outcome of PPF. This review aims to underline the significance of such predisposing factors, point out the severity of PPF, and offer insights into the optimal intra- and post-operative management of the patella.
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Affiliation(s)
| | - Dimitrios Pallis
- Second Department of Orthopaedics, KAT General Hospital of Attica, Athens, GRC
| | - Stavros Lykos
- Second Department of Orthopaedics, KAT General Hospital of Attica, Athens, GRC
| | | | - Petros Nikolakakos
- Second Department of Orthopaedics, KAT General Hospital of Attica, Athens, GRC
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Iddir SP, Phelan KC, Lee CS. Revision Medial Patellofemoral Ligament Reconstruction for Recurrent Instability After Patellofemoral Arthroplasty. Arthrosc Tech 2023; 12:e2247-e2250. [PMID: 38196887 PMCID: PMC10772993 DOI: 10.1016/j.eats.2023.07.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 07/30/2023] [Indexed: 01/11/2024] Open
Abstract
Recurrent patellar instability is a rare complication after patellofemoral arthroplasty (PFA) and usually involves a traumatic injury. Medial patellofemoral ligament (MPFL) reconstruction after arthroplasty is a complicated and technically challenging surgical procedure because the lack of patellar bone stock due to resurfacing significantly increases the risk of patellar fracture. We present our surgical technique for revision MPFL reconstruction for recurrent instability after PFA. This technical note describes the use of 1.8-mm all-suture anchors for revision MPFL reconstruction in patients with decreased patellar bone stock after PFA. This technique reduces the risk of patellar fracture without compromising the integrity of the MPFL graft.
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Affiliation(s)
- Sabrina P. Iddir
- University of Illinois College of Medicine at Chicago, Chicago, Illinois, U.S.A
| | - Kelly C. Phelan
- University of Rochester School of Medicine and Dentistry, Rochester, New York, U.S.A
| | - Christopher S. Lee
- Stetson Lee Orthopaedics and Sports Medicine, Burbank, California, U.S.A
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12
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Lachance AD, Steika R, Lutton J, Austin D. Conversion of Patellofemoral Arthroplasty to Robotic-Assisted Total Knee Arthroplasty. Arthroplast Today 2023; 23:101215. [PMID: 37745967 PMCID: PMC10514419 DOI: 10.1016/j.artd.2023.101215] [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: 03/24/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 09/26/2023] Open
Abstract
Conversion of patellofemoral arthroplasty to total knee arthroplasty (TKA) has been described as similar to primary TKA, although it may come with more challenges and worse outcomes. With the increased rate of revision following conversion TKA vs primary TKA, robotically assisted TKA provides an alternative technique to manual conversion. We present 3 cases of robot-assisted conversion of prior patellofemoral arthroplasty to TKA with good mechanical and clinical outcomes and no intraoperative complications.
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Affiliation(s)
| | - Roman Steika
- Department of Orthopaedic Surgery, Guthrie Clinic, Sayre, PA, USA
| | - Jeffrey Lutton
- Department of Orthopaedic Surgery, Guthrie Clinic, Sayre, PA, USA
| | - David Austin
- Department of Orthopaedic Surgery, Guthrie Clinic, Sayre, PA, USA
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Masoni V, Giustra F, Bosco F, Lo Carmine L, Capella M, Cacciola G, Risitano S, Sabatini L, Massè A. Periprosthetic patella fractures in total knee replacement and revision surgeries: how to diagnose and treat this rare but potentially devastating complication-a review of the current literature. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY & TRAUMATOLOGY : ORTHOPEDIE TRAUMATOLOGIE 2023; 33:2765-2772. [PMID: 37000239 PMCID: PMC10504128 DOI: 10.1007/s00590-023-03535-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 03/20/2023] [Indexed: 04/01/2023]
Abstract
PURPOSE Periprosthetic patella fractures (PPPFs) are infrequent but potentially devastating complications after total knee arthroplasty (TKA) and revision TKA (rTKA). These fractures may occur both in resurfaced and un-resurfaced patella. This review summarizes the current literature on PPPFs to help orthopedic surgeons diagnose and treat this uncommon but extremely challenging TKA complication. METHODS A comprehensive search was performed in three databases: PubMed, SCOPUS, and EMBASE. All relevant information was retrieved and summarized in this narrative review. RESULTS In the studies analyzed, there is a general trend in favor of nonsurgical treatment, except for implant loosening or extensor lag with extensor apparatus disruption, because surgery is often associated with poor clinical outcomes and high complication rates. CONCLUSION PPPF is a rare but catastrophic event in TKA and rTKA, occurring mainly in a reconstructed patella. Patient-, implant-, and surgical technique-related factors contribute to its multifactorial etiopathogenesis. Prevention plays a crucial role in reducing the PPPFs rate. Conservative management is the treatment of choice due to high surgery complication rates unless implant loosening, or extensor apparatus disruption occurs.
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Affiliation(s)
- Virginia Masoni
- Department of Orthopaedics and Traumatology, University of Turin, CTO, Via Zuretti 29, 10126, Turin, Italy
| | - Fortunato Giustra
- Department of Orthopaedics and Traumatology, University of Turin, CTO, Via Zuretti 29, 10126, Turin, Italy
- Department of Orthopaedics and Traumatology, Ospedale San Giovanni Bosco di Torino - ASL Città di Torino, Turin, Italy
| | - Francesco Bosco
- Department of Orthopaedics and Traumatology, University of Turin, CTO, Via Zuretti 29, 10126, Turin, Italy.
- Department of Orthopaedics and Traumatology, Ospedale San Giovanni Bosco di Torino - ASL Città di Torino, Turin, Italy.
| | - Lorenzo Lo Carmine
- Department of Orthopaedics and Traumatology, University of Turin, CTO, Via Zuretti 29, 10126, Turin, Italy
| | - Marcello Capella
- Department of Orthopaedics and Traumatology, University of Turin, CTO, Via Zuretti 29, 10126, Turin, Italy
| | - Giorgio Cacciola
- Department of Orthopaedics and Traumatology, University of Turin, CTO, Via Zuretti 29, 10126, Turin, Italy
- Istituto Ortopedico del Mezzogiorno d'Italia "Franco Scalabrino", Via Consolare Pompea, 98100, Messina, Italy
| | - Salvatore Risitano
- Department of Orthopaedics and Traumatology, University of Turin, CTO, Via Zuretti 29, 10126, Turin, Italy
| | - Luigi Sabatini
- Department of Orthopaedics and Traumatology, University of Turin, CTO, Via Zuretti 29, 10126, Turin, Italy
| | - Alessandro Massè
- Department of Orthopaedics and Traumatology, University of Turin, CTO, Via Zuretti 29, 10126, Turin, Italy
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14
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Ganz MP, Mannino A, Scuderi GR. The Double-Patella Sign: A Patellar Implant Loosening Case Report. JBJS Case Connect 2023; 13:01709767-202312000-00022. [PMID: 37917772 DOI: 10.2106/jbjs.cc.23.00292] [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: 11/04/2023]
Abstract
CASE A 79-year-old man status post total knee arthroplasty (TKA) sustained atraumatic nondisplaced fracture of the inferior pole of the patella 1 year postoperatively. The patient had full radiographic healing and clinical resolution. Two years after injury, the patient reported new-onset knee pain and was found to have atraumatic inferior migration of the patellar component. The lateral radiograph appeared to demonstrate 2 patellae, coined "the double-patella sign." CONCLUSION Nondisplaced patellar fractures after TKA should be monitored even after full osseous healing for component loosening. Inferior migration of a loose patellar component can mimic 2 patellae on the lateral radiograph, mimicking a double patella.
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Affiliation(s)
- Maximillian P Ganz
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York
| | - Angelo Mannino
- Department of Orthopedic Surgery, Northwell Health, Lenox Hill Hospital, New York, New York
| | - Giles R Scuderi
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York
- Department of Orthopedic Surgery, Northwell Health, Lenox Hill Hospital, New York, New York
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15
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Parente A, Medetti M, Raineri D, Parente F, Ventura A, Legnani C. Patellofemoral knee pain following total knee arthroplasty. Comparison between adjusted mechanical and inverse restricted kinematic alignment. J Orthop 2023; 43:121-124. [PMID: 37583756 PMCID: PMC10424064 DOI: 10.1016/j.jor.2023.07.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 07/21/2023] [Indexed: 08/17/2023] Open
Abstract
Objective The aim of this study was to assess the functional, radiological, and clinical outcomes of patellofemoral joint in patients who had total knee arthroplasty (TKA) without patellar resurfacing for end-stage osteoarthritis using inverse restricted kinematic alignment (irKA) compared to a control group using adjusted mechanical alignment (aMA), both executed with the same implant at the same Institution. The hypothesis was that patients undergoing TKA without patellar resurfacing for end-stage osteoarthritis using irKA would have superior outcomes related to the patellofemoral joint in comparison to a control group using aMA. Methods A retrospective examination of registries' prospectively obtained from patients who underwent primary TKA at our Institution between 2016 and 2020 was performed. 40 consecutive patients who underwent TKA implant using irKA were compared to a control group of 80 who had undergone adjusted mechanically-aligned TKA. Groups were matched for age and body mass index. Clinical assessment included Visual Analog Scale (VAS), Knee Osteoarthritis Outcome Score (KOOS), Knee Society Score (KSS), and Kujala Knee Score. Standard weight-bearing anteroposterior and lateral view x-rays were used for radiographic evaluation. Patellar height was assessed using Caton-Deschamps (C-D) and Insall index on lateral view films. Results In comparison to pre-operative status, both groups had postoperative improvements in VAS, KOOS, KSS, and Kujala ratings (p<0.001). Regarding Kujala score, there were no statistically significant differences between the groups (p = 0.68). Insall index and C-D index results were not statistically different across groups (p = 0.02 and 0.74 respectively). Conclusion Improvements in post-operative clinical and functional outcomes following TKA were associated with either irKA or aMA. There were no discernible changes between the two groups in terms of postoperative patellofemoral discomfort or variations in patellar height.
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Affiliation(s)
- Andrea Parente
- IRCCS Istituto Ortopedico Galeazzi, Hip and Knee Arthroplasty Surgery Center, Milan, Italy
| | - Marta Medetti
- IRCCS Istituto Ortopedico Galeazzi, Hip and Knee Arthroplasty Surgery Center, Milan, Italy
| | | | - Franco Parente
- IRCCS Istituto Ortopedico Galeazzi, Hip and Knee Arthroplasty Surgery Center, Milan, Italy
| | - Alberto Ventura
- IRCCS Istituto Ortopedico Galeazzi, Sport Traumatology and Minimally Invasive Surgery Center, Milan, Italy
| | - Claudio Legnani
- IRCCS Istituto Ortopedico Galeazzi, Sport Traumatology and Minimally Invasive Surgery Center, Milan, Italy
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16
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Borukhov I, Esposito CI, Ismailidis P, LiArno S, Lyon JP, McCarthy TF, McEwen P. The trochlear sulcus of the native knee is consistently orientated close to the sagittal plane despite variation in distal condylar anatomy. Knee Surg Sports Traumatol Arthrosc 2023; 31:3618-3626. [PMID: 34291310 PMCID: PMC10435591 DOI: 10.1007/s00167-021-06667-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 07/09/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE The aim of this study was to describe the native trochlear orientation of non-arthritic knees in three planes and to quantify the relationship between trochlear and distal condylar anatomy across race and sex. METHODS Computed tomography scans of 1578 femora were included in this study. The mediolateral position of the trochlear sulcus, the distal trochlear sulcus angle (DTSA) the medial sulcus angle (MSA) and the lateral sulcus angle (LSA) as well as the mechanical lateral distal femoral angle (mLDFA) were measured relative to a standard reference coordinate system. Multiple linear regression analyses were performed to account for potential confounding variables. RESULTS The mediolateral position of the trochlear sulcus had minimal mean deviation of the sagittal femoral plane. The mean DTSA was 86.1° (SD 2.2°). Multilinear regression analysis found mLDFA, sex, and age all influence DTSA (p < 0.05), with mLDFA having by far the greatest influence (r2 = 0.55). The medial facet of the trochlear sulcus was found to be flat proximally and more prominent distally. The lateral facet was relatively uniform throughout the arc. CONCLUSION In non-arthritic knees, due to a strong positive correlation between the DTSA and the mLDFA, the trochlear sulcus is consistently orientated in the sagittal femoral plane regardless of distal condylar anatomy. Minor deviations from the sagittal plane occur in a lateral direction in the middle part and in a medial direction at the proximal and distal part of the trochlea. These findings have relevance regarding the biomimetic design of total knee implants.
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Affiliation(s)
| | | | - Petros Ismailidis
- The Orthopaedic Research Institute of Queensland (ORIQL), 7 Turner St, Pimlico Townsville, QLD, Australia.
- Department of Orthopaedics and Traumatology, University Hospital of Basel, Spitalstrasse 21, 4031, Basel, Switzerland.
| | | | | | | | - Peter McEwen
- The Orthopaedic Research Institute of Queensland (ORIQL), 7 Turner St, Pimlico Townsville, QLD, Australia
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17
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Barahona M, Barrientos C, Alegría A, Barahona MA, Navarro T, Hinzpeter J, Palet M, Zamorano Á, Catalán J, Infante C. Anterior knee pain and sit-up tests predicts patients' satisfaction and improvement in quality of life after anterior stabilized total knee replacement without patellar resurfacing. J Exp Orthop 2023; 10:73. [PMID: 37493976 PMCID: PMC10371966 DOI: 10.1186/s40634-023-00641-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 07/18/2023] [Indexed: 07/27/2023] Open
Abstract
PURPOSE The purpose of this study was to assess patient satisfaction and identify risk factors for dissatisfaction after anterior stabilised conventional total knee arthroplasty (TKA) without patellar resurfacing, using the Goodman score. METHODS We conducted a cross-sectional study using data from our institutional database from 1 January 2018 to 1 March 2021. Patients who underwent TKA with the Vanguard® Cruciate Retaining Anterior Stabilized Knee System (Zimmer Biomet, Warsaw, Indiana, USA) without patellar replacement were included. Patients with other bearing surfaces (posterior stabilised or medial congruent) or diagnosed with infection or instability were excluded. Patients' reported outcomes, body mass index (BMI), passive range of motion, the timed up-and-go test, sit-up test, and algometry were assessed. Patients were also asked if they had anterior knee pain. Satisfaction was assessed using the Goodman scale, and logistic multivariate regression was used to identify variables associated with dissatisfaction and perceived improvement in quality of life. RESULTS A total of 131 TKA patients were included in the study. The median satisfaction score was 100 (interquartile range [IQR], 87.5 to 100), with the 75-point threshold at the 90th percentile according to Section A of Goodman. Section B of Goodman showed that 113 TKA patients (86.26%) reported "great improvement" or "more than I ever dreamed." Multivariate logistic regression revealed that anterior knee pain (OR 5.16, 95% CI 1.24 to 21.39), the sit-up test (OR 0.63, 95% CI 0.49 to 0.81), and BMI (OR 0.84, 95% CI 0.70 to 0.99) were significantly associated with patient dissatisfaction and a worse perceived improvement in quality of life. The receiver operating characteristics curve for the models had areas under the curve of 0.83 (95% CI 0.69 to 0.97) and 0.82 (95% CI 0.70 to 0.94), respectively. CONCLUSION Anterior stabilised TKA without patellar resurfacing can achieve 90% satisfaction and 86% improvement in quality of life. To improve these results, it is essential to prevent and treat anterior knee pain and enhance quadriceps strength. LEVEL OF EVIDENCE Level III (retrospective cohort study).
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Affiliation(s)
- Maximiliano Barahona
- Orthopaedic Department at Hospital Clinico Universidad de Chile, 999 Carlos Lorca Tobar Street, 3Rd Floor, Office 351. Independencia, Santiago, Chile.
| | - Cristian Barrientos
- Orthopaedic Department at Hospital Clinico Universidad de Chile, 999 Carlos Lorca Tobar Street, 3Rd Floor, Office 351. Independencia, Santiago, Chile
| | - Anselmo Alegría
- Orthopaedic Department at Hospital Clinico Universidad de Chile, 999 Carlos Lorca Tobar Street, 3Rd Floor, Office 351. Independencia, Santiago, Chile
| | - Macarena A Barahona
- Orthopaedic Department at Hospital Clinico Universidad de Chile, 999 Carlos Lorca Tobar Street, 3Rd Floor, Office 351. Independencia, Santiago, Chile
| | - Tomas Navarro
- Orthopaedic Department at Hospital Clinico Universidad de Chile, 999 Carlos Lorca Tobar Street, 3Rd Floor, Office 351. Independencia, Santiago, Chile
| | - Jaime Hinzpeter
- Orthopaedic Department at Hospital Clinico Universidad de Chile, 999 Carlos Lorca Tobar Street, 3Rd Floor, Office 351. Independencia, Santiago, Chile
| | - Miguel Palet
- Orthopaedic Department at Hospital Clinico Universidad de Chile, 999 Carlos Lorca Tobar Street, 3Rd Floor, Office 351. Independencia, Santiago, Chile
| | - Álvaro Zamorano
- Orthopaedic Department at Hospital Clinico Universidad de Chile, 999 Carlos Lorca Tobar Street, 3Rd Floor, Office 351. Independencia, Santiago, Chile
| | - Jaime Catalán
- Orthopaedic Department at Hospital Clinico Universidad de Chile, 999 Carlos Lorca Tobar Street, 3Rd Floor, Office 351. Independencia, Santiago, Chile
| | - Carlos Infante
- Orthopaedic Department at Hospital Clinico Universidad de Chile, 999 Carlos Lorca Tobar Street, 3Rd Floor, Office 351. Independencia, Santiago, Chile
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18
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Connolly P, Coombs S, Schwarzkopf R. Mechanical complications after total knee arthroplasty. Expert Rev Med Devices 2023; 20:1105-1117. [PMID: 37950354 DOI: 10.1080/17434440.2023.2282744] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 11/08/2023] [Indexed: 11/12/2023]
Abstract
INTRODUCTION With the increasing demand for total knee arthroplasty (TKA) and the burden of revision TKA on the healthcare system, as well as the quality of life implications for patients, it is extremely important for surgeons to be able to anticipate and prevent TKA mechanical complications. Surgeons must be familiar with the different causes and mechanisms of TKA complications so that they can properly treat patients with failed TKAs and better avoid these complications. AREAS COVERED This review addresses TKA mechanical complications and provides context for the topic. A detailed review of surgical factors, implant factors, and patient factors that contribute to mechanical complications after TKA is provided. All of the literature cited in this review was gathered from the PubMed online database using different keywords based on the section of the manuscript. EXPERT OPINION As surgeons and engineers solve certain issues in TKA, new challenges will inevitably arise. We must continue to push forward and innovate from both a surgical technique and implant design perspective.
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Affiliation(s)
- Patrick Connolly
- Department of Orthopedic Surgery, NYU Langone Health, New York, NY, USA
| | - Stefan Coombs
- Department of Orthopedic Surgery, NYU Langone Health, New York, NY, USA
| | - Ran Schwarzkopf
- Department of Orthopedic Surgery, NYU Langone Health, New York, NY, USA
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19
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Jung HJ, Kang MW, Lee JH, Kim JI. Learning curve of robot-assisted total knee arthroplasty and its effects on implant position in asian patients: a prospective study. BMC Musculoskelet Disord 2023; 24:332. [PMID: 37106353 PMCID: PMC10134614 DOI: 10.1186/s12891-023-06422-w] [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: 08/07/2022] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
BACKGROUND Robot-assisted total knee arthroplasty (r-TKA) can reportedly achieve more accurate implant positioning than conventional total knee arthroplasty (c-TKA), although its learning curve is controversial. Moreover, few studies have investigated r-TKA in Asians, who have different anatomical characteristics. This study aimed to determine the learning curve for r-TKA and compare implant positions between r-TKA and c-TKA according to the learning curve in Asian patients. METHODS This prospective study included 50 consecutive c-TKAs (group C), followed by 50 consecutive r-TKAs conducted using the MAKO robotic system (Stryker, USA). Cumulative summation analyses were performed to assess the learning curve for operative time in r-TKA. Accordingly, the r-TKA cases were divided into the initial (group I) and proficiency cases (group P). The femoral and tibial component positions in the coronal, sagittal, and axial planes and lower limb alignment were compared among the three groups. RESULTS r-TKA was associated with a learning curve for operative time in 18 cases. The operative time was significantly shorter in groups C and P than that in group I, with no significant difference between groups C and P. Groups I and P demonstrated fewer outliers with respect to lower limb alignment, femoral component coronal position, axial position, and tibial component sagittal position than those in group C, with no significant difference between groups I and P. CONCLUSION The operative time did not differ significantly between r-TKA and c-TKA after the learning curve. Surgeons could expect more accurate and reproducible lower limb alignment and implant positioning with r-TKA in Asian patients, irrespective of the learning curve.
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Affiliation(s)
- Ho Jung Jung
- Department of Orthopedic Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
| | - Min Wook Kang
- Department of Orthopedic Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
| | - Jong Hwa Lee
- Department of Orthopedic Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
| | - Joong Il Kim
- Department of Orthopedic Surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
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20
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Cieremans DA, Arraut J, Marwin S, Slover J, Schwarzkopf R, Rozell JC. Patellar Component Design Does Not Impact Clinical Outcomes in Primary Total Knee Arthroplasty. J Arthroplasty 2023:S0883-5403(23)00081-5. [PMID: 36764403 DOI: 10.1016/j.arth.2023.01.061] [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: 07/30/2022] [Revised: 01/26/2023] [Accepted: 01/31/2023] [Indexed: 02/12/2023] Open
Abstract
BACKGROUND Round or oval implants are used in patellar resurfacing during total knee arthroplasty (TKA). However, whether component geometry affects clinical outcomes is unclear. This study aimed to determine if one implant shape conferred superior outcomes to the other. METHODS A retrospective review of primary TKA cases performed from 2016 to 2020 was conducted at an urban, tertiary academic center. Four hundred consecutive, primary TKAs were included in these analyses. Cases were included if a surgeon used the round design then oval design for fifty consecutive cases. Baseline demographic data and radiographic measurements were assessed. Surgical data, reasons for revision, and patient-reported outcome measures were analyzed. Independent samples t-test and chi-square tests were used to compare means and proportions. There were no demographic differences between the cohorts. RESULTS Postoperative patellar tilt was statistically different between the cohorts. Sixteen patients required revision surgery; however, revision rates did not differ between the cohorts. Of the 9 rounds, 1 button was revised for infection. Of the 7 ovals, 1 button was revised for infection and 1 for loosening. Veterans RAND 12 Physical Component Score at 3 months postoperatively was higher for the round cohort, but no differences were observed at 1 year. CONCLUSION While radiographic patellar tilt was significantly different between the cohorts, there was no clinical correlation in outcomes at 3 months or 1 year postoperatively. Longer-term follow-up studies are needed to evaluate the implications of patellar component design on outcomes and function. Nevertheless, the current study affirms that both designs are clinically equivalent which should be used to guide clinical decision-making. LEVEL III EVIDENCE Retrospective Cohort.
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Affiliation(s)
| | - Jerry Arraut
- New York University Langone Orthopedic Hospital, New York, New York
| | - Scott Marwin
- New York University Langone Orthopedic Hospital, New York, New York
| | - James Slover
- New York University Langone Orthopedic Hospital, New York, New York
| | - Ran Schwarzkopf
- New York University Langone Orthopedic Hospital, New York, New York
| | - Joshua C Rozell
- New York University Langone Orthopedic Hospital, New York, New York
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21
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Lustig S, Servien E, Batailler C. How to optimize patellar tracking in knee arthroplasty? Orthop Traumatol Surg Res 2023; 109:103458. [PMID: 36302447 DOI: 10.1016/j.otsr.2022.103458] [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: 11/21/2021] [Accepted: 04/04/2022] [Indexed: 12/24/2022]
Abstract
Good patellar tracking is needed for functionally successful total knee arthroplasty (TKA), and depends on several factors. The aim of the present Instructional Lecture is to identify the main factors and how to control them so as to optimize patellar tracking: more or less "patella-friendly" prosthetic trochlea design, requiring precise assessment and choice of model; patellar component design; type of tibial implant; surgical approach and management of peripatellar structures, and any lateral release; distal and posterior femoral bone cuts, determining femorotibial alignment, femoral component rotation and patellar height; tibial implant rotation with respect to the anterior tibial tubercle; patellar cut characteristics in resurfacing. In case of instability or patellar maltracking despite correct implant positioning, there are 2 main surgical techniques: medial patellofemoral ligament reconstruction, and anterior tibial tubercle medialization. To obtain optimal patellar tracking, correction of other factors should be associated: trochlear component design, distal and posterior femoral bone cuts, tibial implant positioning, patellar component shape and positioning, etc.
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Affiliation(s)
- Sébastien Lustig
- Service de chirurgie orthopédique et médecine du sport, centre d'Excellence FIFA, hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France.
| | - Elvire Servien
- Service de chirurgie orthopédique et médecine du sport, centre d'Excellence FIFA, hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
| | - Cécile Batailler
- Service de chirurgie orthopédique et médecine du sport, centre d'Excellence FIFA, hôpital de la Croix Rousse, Hospices Civils de Lyon, Lyon, France
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22
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Adam R, Moldovan C, Tudorache S, Hârșovescu T, Orban C, Pogărășteanu M, Rusu E. Patellar Resurfacing in Total Knee Arthroplasty, a Never-Ending Controversy; Case Report and Literature Review. Diagnostics (Basel) 2023; 13:diagnostics13030383. [PMID: 36766489 PMCID: PMC9914207 DOI: 10.3390/diagnostics13030383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/15/2022] [Accepted: 01/11/2023] [Indexed: 01/21/2023] Open
Abstract
Total knee arthroplasty (TKA) remains a lifesaving procedure for advanced gonarthrosis. However, patella resurfacing (PR) in TKA remains a controversial procedure, leading to extensive discussions amongst orthopedic surgeons, regarding its indications and results. Based on these premises, we present a clinical case of a 70-year-old Caucasian woman admitted for pain, swelling and limitation of left knee joint mobility. Her medical history records an Ahlback stage IV gonarthrosis with simultaneous bilateral TKA surgery performed in different hospital, when two NexGen cemented total prostheses were implanted with patellar resurfacing being performed only on the right side. Our clinical (American Knee Society Score, Lonner and Feller scales) and radiological evaluations (CT scan and Xray) revealed left patellar arthrosis and a slight lateral subluxation of the patella. The chosen treatment plan was revision surgery for PR and patellar prosthesis with a cemented patellar component, cross-linked polyethylene, no 32 NexGen model with 8.5 mm thickness. The immediate and distant postoperative evolution was favorable. Extensive literature review shows that, at present, PR remains at surgeon's discretion mainly based on his previous results. Therefore, we believe there is an imperative need to develop high quality studies based on accurate scientific evidence to universally establish valid guidelines for PR in TKA.
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Affiliation(s)
- Răzvan Adam
- Department of Orthopedics and Traumatology, Elias Emergency University Hospital, 011461 Bucharest, Romania
- Department of First Aid and Disaster Medicine, Faculty of Medicine, Titu Maiorescu University of Bucharest, 040051 Bucharest, Romania
| | - Cosmin Moldovan
- Department of Clinical Sciences, General Surgery, Faculty of Medicine, Titu Maiorescu University of Bucharest, 040051 Bucharest, Romania
- Department of General Surgery, Witting Clinical Hospital, 010243 Bucharest, Romania
- Correspondence: (C.M.); (T.H.); Tel.: +40-723504207 (C.M.); +40-723234060 (T.H.)
| | - Sorin Tudorache
- Department of Preclinical Sciences, Anatomy and Embryology, Faculty of Medicine, Titu Maiorescu University of Bucharest, 040051 Bucharest, Romania
| | - Tudor Hârșovescu
- Department of Preclinical Sciences, Anatomy and Embryology, Faculty of Medicine, Titu Maiorescu University of Bucharest, 040051 Bucharest, Romania
- Correspondence: (C.M.); (T.H.); Tel.: +40-723504207 (C.M.); +40-723234060 (T.H.)
| | - Carmen Orban
- Department of Anesthesia and Intensive Care, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
- Intensive Care Unit Department, Monza Oncology Hospital, 013812 Bucharest, Romania
| | - Mark Pogărășteanu
- Department of Orthopedics and Traumatology, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
- Department of Orthopedics and Traumatology, Dr. Carol Davila Central Military Emergency University Hospital, 010825 Bucharest, Romania
| | - Elena Rusu
- Department of Preclinical Sciences, Biochemistry, Faculty of Medicine, Titu Maiorescu University of Bucharest, 040051 Bucharest, Romania
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Derr T, MacDonald DW, Klein GR, Mont MA, Piuzzi NS, Kurtz SM. Short-Term Surface Damage Mechanisms of Retrieved Highly Cross-Linked Polyethylene Patellar Components. J Arthroplasty 2022; 38:939-944.e1. [PMID: 36574538 DOI: 10.1016/j.arth.2022.11.005] [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: 07/19/2022] [Revised: 11/16/2022] [Accepted: 11/22/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Previous retrieval studies of patellar components for total knee arthroplasty focused on historical designs and polyethylene materials that are no longer clinically relevant. Therefore, this study aimed to compare revision reasons and surface damage mechanisms of conventional, gamma inert sterilized polyethylene and highly cross-linked polyethylene (HXLPE) patellar components in contemporary designs from a single manufacturer. METHODS A total of 114 gamma inert and 76 HXLPE patellar components were gathered in a multicenter orthopaedic implant retrieval program. Patient age and body mass index were similar between cohorts (P = .27 and P = .42, respectively); however, the gamma inert cohort was implanted longer (μdifference = 3.1 years; P = .005). A matched subset was created based on the total knee arthroplasty design, patellar shape, and implantation time. Revision reasons were gathered from revision operating notes, and surface damage was examined via the Hood scoring method. Differences between HXLPE and gamma inert cohorts were evaluated using Mann-Whitney U-tests. RESULTS The most common revision reasons were infection, loosening, and instability, with the most common patellar complication resulting in revision being patellar loosening for both cohorts with similar incidences for both (chi-square; P = .60, P = .59). The most common surface damage modes were burnishing, scratching, and pitting in both cohorts. Total surface damage was significantly higher in the gamma inert components (P = .02), but not in the matched subset (P = .46). CONCLUSION Overall, the clinical performance of HXLPE was similar to that of conventional polyethylene for patellar components with short implantation times. While this study provides much needed information on the performance of HXLPE patellae in short-term retrievals, long-term studies are still needed.
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Affiliation(s)
- Tabitha Derr
- Implant Research Core, Drexel University, Philadelphia, Pennsylvania
| | | | | | - Michael A Mont
- Sinai Hospital of Baltimore, Rubin Institute for Advanced Orthopedics, Baltimore, Maryland
| | | | - Steven M Kurtz
- Implant Research Core, Drexel University, Philadelphia, Pennsylvania
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24
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Ji X, Huang X, Zhang Y, Zhao M, Liu Y, Cheng Y. Peripheral patellar denervation has a better effect in reducing postoperative anterior knee pain than patellar resurfacing in TKA. Medicine (Baltimore) 2022; 101:e31584. [PMID: 36397397 PMCID: PMC9666178 DOI: 10.1097/md.0000000000031584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Patellar resurfacing (PR) and peripheral patellar denervation (PD) are common surgical treatments for knee osteoarthritis (KOA) in total knee arthroplasty (TKA). The aim of study was to compare preventive effect on postoperative anterior knee pain (AKP) between PR and peripheral PD in TKA. A total of 202 patients who underwent unilateral TKA were randomized into 3 groups: T, TPD, and TPR. Patients in T group received simple TKA, patients in TPD group received TKA combined PD while patients in TPR group received TKA combined PR. Incidence, intensity, and presentation time of AKP and clinical outcomes were evaluated at 3, 6, 9, 12, 18, and 24 months postoperatively. The incidence of AKP was significantly lower and the intensity of AKP and patients' satisfaction score were significantly better at 3 months after surgery in group TPD and TPR compared with group T. Compared with group TPR, the intensity of AKP was significantly better at 3 months after surgery in group TPD. There were no significant difference in Oxford knee score, range of motion (ROM), patellar score, knee society score (KSS) and activities of daily living (ADL) score among 3 groups in the follow-up period. Both PD and PR can effectively reduce the intensity and incidence of AKP after TKA and improve patients' satisfaction at 3 months after TKA. Additionally, PD is more effective on alleviating AKP than PR.
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Affiliation(s)
- Xiaohui Ji
- Department of Orthopedics, Cangzhou Hospital of Integrated TCM-WM, Cangzhou, Hebei, P.R. China
| | - Xiaodan Huang
- Department of Orthopedics, the Third Hospital of Hebei Medical University, Hebei, P.R. China
| | - Yingying Zhang
- Department of pain, the Third Hospital of Hebei Medical University, Hebei, P.R. China
| | - Ming Zhao
- Department of Orthopedics, the Third Hospital of Hebei Medical University, Hebei, P.R. China
| | - Yaming Liu
- Department of pain, the Third Hospital of Hebei Medical University, Hebei, P.R. China
| | - Yanxin Cheng
- Department of pain, the Third Hospital of Hebei Medical University, Hebei, P.R. China
- *Correspondence: Yanxin Cheng, Department of pain, the Third Hospital of Hebei Medical University, NO.139 Ziqiang Road, Shijiazhuang 050051, P.R. China (e-mail: )
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Akti S, Cankaya D, Kilinc S, Oztemur Z, Ozturk H, Bulut O. Effect of patellar resurfacing surgery on bleeding in total knee arthroplasty. Rev Assoc Med Bras (1992) 2022; 68:1542-1546. [DOI: 10.1590/1806-9282.20220492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 08/17/2022] [Indexed: 11/29/2022] Open
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LEWIS PL, W-DAHL A, ROBERTSSON O, PRENTICE HA, GRAVES SE. Impact of patient and prosthesis characteristics on common reasons for total knee replacement revision: a registry study of 36,626 revision cases from Australia, Sweden, and USA. Acta Orthop 2022; 93:623-633. [PMID: 35819795 PMCID: PMC9275496 DOI: 10.2340/17453674.2022.3512] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND AND PURPOSE Total knee replacement (TKR) studies usually analyze all-cause revision when considering relationships with patient and prosthesis factors. We studied how these factors impact different revision diagnoses. PATIENTS AND METHODS We used data from 2003 to 2019 of TKR for osteoarthritis from the arthroplasty registries of Sweden, Australia, and Kaiser Permanente, USA to study patient and prosthesis characteristics for specific revision diagnoses. There were 1,072,924 primary TKR included and 36,626 were revised. Factors studied included age, sex, prosthesis constraint, fixation method, bearing mobility, polyethylene type, and patellar component use. Revision diagnoses were arthrofibrosis, fracture, infection, instability, loosening, pain, patellar reasons, and wear. Odds ratios (ORs) for revision were estimated and summary effects were calculated using a meta-analytic approach. RESULTS We found between-registry consistency in 15 factor/reason analyses. Risk factors for revision for arthrofibrosis were age < 65 years (OR 2.0; 95% CI 1.4-2.7) and mobile bearing designs (MB) (OR 1.7; CI 1.1-2.5), for fracture were female sex (OR 3.2; CI 2.2-4.8), age ≥ 65 years (OR 2.8; CI 1.9-4) and posterior stabilized prostheses (PS) (OR 2.1; CI 1.3-3.5), for infection were male sex (OR 1.9; CI 1.7-2.0) and PS (OR 1.5; CI 1.2-1.8), for instability were age < 65 years (OR 1.5; CI 1.3-1.8) and MB (OR 1.5; CI 1.1-2.2), for loosening were PS (OR 1.5; CI 1.4-1.6), MB (OR 2.2; CI 1.6-3.0) and use of ultra-high molecular weight polyethylene (OR 2.3; CI 1.8-2.9), for patellar reasons were not resurfacing the patella (OR 13.6; CI 2.1-87.2) and MB (OR 2.0; CI 1.2-3.3) and for wear was cementless fixation (OR 4.9; CI 4.3-5.5). INTERPRETATION Patients could be counselled regarding specific age and sex risks. Use of minimally stabilized, fixed bearing, cemented prostheses, and patellar components is encouraged to minimize revision risk.
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Affiliation(s)
- Peter L LEWIS
- Australian Orthopaedic Association National Joint Replacement Registry, South Australian Health and Medical Research Institute, Adelaide, South Australia,Department of Orthopedics, Clinical Science Lund, Faculty of Medicine, Lund University, Lund, Sweden
| | - Annette W-DAHL
- Swedish Knee Arthroplasty Register, Lund, Sweden,Department of Orthopedics, Clinical Science Lund, Faculty of Medicine, Lund University, Lund, Sweden
| | - Otto ROBERTSSON
- Swedish Knee Arthroplasty Register, Lund, Sweden,Department of Orthopedics, Clinical Science Lund, Faculty of Medicine, Lund University, Lund, Sweden
| | | | - Stephen E GRAVES
- Australian Orthopaedic Association National Joint Replacement Registry, South Australian Health and Medical Research Institute, Adelaide, South Australia
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Shatrov J, Colas A, Fournier G, Batailler C, Servien E, Lustig S. Tibial tuberosity osteotomy and medial patellofemoral ligament reconstruction for patella dislocation following total knee arthroplasty: A double fixation technique. SICOT J 2022; 8:23. [PMID: 35699459 PMCID: PMC9196027 DOI: 10.1051/sicotj/2022023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 05/13/2022] [Indexed: 11/24/2022] Open
Abstract
Introduction: Patella instability post total knee arthroplasty (TKA) is a rare complication. Tibial tubercle osteotomy (TTO) with medial patellofemoral ligament reconstruction (MPFLr) has not been well described for this indication. This paper describes a surgical technique to address the unique challenges faced when performing TTO and MPFLr in the prosthetic knee. Technique: This technique and video describe a TTO and MPFLr via an extensile incision and medial sub-vastus approach. A 6 cm long TTO is performed, if indicated, to medialise the extensor mechanism up to 1 cm and fixed with ×2 4.5 mm cortical screws. For the MPFLr, a quadriceps tendon autograft is utilized, with the natural insertion to the superior pole of the patella being left undisturbed. The graft is first attached with an interference screw and then reinforced with an endobutton to provide crucial cortical fixation to overcome the problem of low bone mineral density encountered in this area of the femur following TKA. Results: Five patients underwent MPFLr using the described technique. No failures or recurrence of instability occurred at the last follow-up. Pre-operative mean patella tilt and shift were 44° and 3.5 cm, respectively. Post-operatively, mean tilt and shift were 4.1° and 0.4 cm, respectively. There was one wound dehiscence requiring surgical debridement and closure. Conclusion: This paper describes a surgical technique to perform a TTO and MPFLr for patella instability post-TKA. The described method highlights key adaptations to address the unique challenges in this patient population.
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Affiliation(s)
- Jobe Shatrov
- Orthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, 103 Grande Rue de la Croix Rousse, 69004 Lyon, France
| | - Antoine Colas
- Orthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, 103 Grande Rue de la Croix Rousse, 69004 Lyon, France
| | - Gaspard Fournier
- Orthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, 103 Grande Rue de la Croix Rousse, 69004 Lyon, France
| | - Cécile Batailler
- Orthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, 103 Grande Rue de la Croix Rousse, 69004 Lyon, France - Univ Lyon, Claude Bernard Lyon 1 University, IFSTTAR, LBMC UMR_T9406, 69622 Lyon, France
| | - Elvire Servien
- Orthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, 103 Grande Rue de la Croix Rousse, 69004 Lyon, France - Univ Lyon, Claude Bernard Lyon 1 University, IFSTTAR, LBMC UMR_T9406, 69622 Lyon, France
| | - Sébastien Lustig
- Orthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, 103 Grande Rue de la Croix Rousse, 69004 Lyon, France - Univ Lyon, Claude Bernard Lyon 1 University, IFSTTAR, LBMC UMR_T9406, 69622 Lyon, France
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Kubota Y, Tanaka K, Hirakawa M, Iwasaki T, Kawano M, Itonaga I, Tsumura H. Patellar dislocation following distal femoral replacement after extra-articular knee resection for bone sarcoma: A case report. World J Clin Cases 2022; 10:3561-3572. [PMID: 35611187 PMCID: PMC9048549 DOI: 10.12998/wjcc.v10.i11.3561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/09/2022] [Accepted: 02/27/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND For the treatment of bone sarcoma in the distal femur, wide-margin resection and knee reconstruction with tumor endoprosthesis are standard therapies. Extra-articular knee resection is required in cases of tumor invasion of the knee joint; however, the incidence of complications, such as aseptic loosening, prosthesis infection, and implant failure, is higher than that following intra-articular knee resection. To the best of our knowledge, there are three reports of patellar dislocations after replacement of a tumor endoprosthesis.
CASE SUMMARY A 36-year-old man with no significant past medical history was admitted to our institution with continuous pain in his left knee for 4 mo. An open biopsy was performed, and the patient was diagnosed with a left distal femoral malignant bone tumor. Extra-articular knee resection and knee reconstruction with a tumor endoprosthesis were performed. Although the alignment of the tumor prosthesis was acceptable, knee instability was noticed postoperatively. The axial radiographic view of the patellar and computed tomography showed lateral patellar dislocation at 4 wk postoperatively. The patient had to undergo a lateral release and proximal realignment. He could perform his daily activities at 9 mo postoperatively. Radiography revealed no patellar re-dislocation.
CONCLUSION Proximal realignment may be considered during primary surgery if there is an imbalance in the forces controlling the patellar tracking.
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Affiliation(s)
- Yuta Kubota
- Orthopaedic Surgery, Oita University, Yufu City 879-5593, Oita, Japan
| | - Kazuhiro Tanaka
- Orthopaedic Surgery, Oita University, Yufu City 879-5593, Oita, Japan
| | - Masashi Hirakawa
- Orthopaedic Surgery, Oita University, Yufu City 879-5593, Oita, Japan
| | - Tatsuya Iwasaki
- Orthopaedic Surgery, Oita University, Yufu City 879-5593, Oita, Japan
| | - Masanori Kawano
- Orthopaedic Surgery, Oita University, Yufu City 879-5593, Oita, Japan
| | - Ichiro Itonaga
- Orthopaedic Surgery, Oita University, Yufu City 879-5593, Oita, Japan
| | - Hiroshi Tsumura
- Orthopaedic Surgery, Oita University, Yufu City 879-5593, Oita, Japan
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Noh JH, Kim NY, Song KI. Comparison of clinical outcomes between patellar resurfacing and patellar non-resurfacing in cruciate retaining total knee arthroplasty. J Orthop Surg (Hong Kong) 2022; 30:10225536221092223. [PMID: 35392729 DOI: 10.1177/10225536221092223] [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] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND It is not established whether patellar resurfacing is better than patellar non-resurfacing during total knee arthroplasty (TKA). This study was to compare the clinical outcomes between groups with patellar resurfacing and non-resurfacing during cruciate retaining (CR) TKA. METHODS In this retrospective cohort study, subjects undergoing primary CR TKA for osteoarthritis between 2012 and 2019 were included. Of 500 subjects, 250 had patellar resurfacing (group 1) and 250 had patellar non-resurfacing (group 2) CR TKA. Knee society knee score (KSKS), knee society function score (KSFS), Western Ontario and McMaster Universities Osteoarthritis (WOMAC) scale, Kujala score, anterior knee pain, patellar compression test and range of motion (ROM) of the replaced knee were assessed and compared between the two groups. RESULTS There were no significant differences in KSKS, KSFS, WOMAC scale, Kujala score, prevalence of anterior knee pain and ROM of the replaced knee between the two groups at the last follow-up (p > .05). Group 2 had more subjects with positive patellar compression test than group 1 at the last follow-up (p = .010). CONCLUSIONS Clinical and functional outcomes of the replaced knee were not different between patellar resurfacing and non-resurfacing groups. Anterior knee pain was significantly reduced after total knee arthroplasty regardless of patellar resurfacing. LEVEL OF EVIDENCE Retrospective cohort study, Level III.
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Affiliation(s)
- Jung Ho Noh
- Department of Orthopaedic Surgery, 70518Kangwon National University Hospital, Chuncheon-si, South Korea
| | - Nam Yeop Kim
- Department of Orthopaedic Surgery, 70518Kangwon National University Hospital, Chuncheon-si, South Korea
| | - Ki Ill Song
- Department of Orthopaedic Surgery, 70518Kangwon National University Hospital, Chuncheon-si, South Korea
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Deroche E, Batailler C, Swan J, Sappey-Marinier E, Neyret P, Servien E, Lustig S. No difference between resurfaced and non-resurfaced patellae with a modern prosthesis design: a prospective randomized study of 250 total knee arthroplasties. Knee Surg Sports Traumatol Arthrosc 2022; 30:1025-1038. [PMID: 33661323 DOI: 10.1007/s00167-021-06521-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 02/22/2021] [Indexed: 12/21/2022]
Abstract
PURPOSE Despite numerous well-conducted studies and meta-analyses, the management of the patella during total knee arthroplasty (TKA) remains controversial. The aim of our study was to compare the clinical and radiological outcomes between patients with and without patellar resurfacing and to determine the influence of resurfacing on patellar tracking with a "patella-friendly" prosthesis. METHODS A single-centered prospective randomized controlled study was performed between April 2017 and November 2018. Two hundred and forty-five consecutive patients (250 knees) scheduled for TKA were randomized for patellar resurfacing or patella non-resurfacing. All patients received the same total knee prosthesis and were evaluated clinically and radiologically, including the International Knee Society Score (KSS knee and function), Forgotten Joint Score (FJS), anterior knee pain (AKP), pain when climbing stairs, patellar tilt, and patellar translation. RESULTS Two hundred and twenty-nine knees were available for clinical evaluation and 221 knees for radiographic analysis. The revision rate for patellofemoral cause was 3.1% (7 cases) with no difference between the groups (p = 0.217). There was no difference in survival rate between patellar resurfacing (88.3%) and non-resurfacing (85.3%) after 24 months (p = 0.599). There were no differences in KSS functional component (p = 0.599), KSS knee component (p = 0.396), FJS (p = 0.798), and AKP (p = 0.688) at a mean follow-up of 18 months. There was twice as much stair pain for the non-resurfacing group (17.1% versus 8.5%) (p = 0.043). There was patellar tilt in 43% of resurfaced knees (n = 50/116) versus 29% in non-resurfaced knees (n = 30/105) (p = 0.025); however, there was more patellar translation in the non-resurfaced group (21.0% versus 7.8%) (p < 0.001). There were no specific complications attributed to the patellar resurfacing procedure. There were four secondary patellar resurfacing procedures (3.6%) in the non-resurfaced group after a mean of 10 ± 7 months (1-17) postoperatively. CONCLUSION There is no superiority of patellar resurfacing or non-resurfacing in terms of clinical or radiological outcomes at mid-term. Secondary patellar resurfacing is rare. There is not enough evidence to recommend systematic patellar resurfacing with a "patella-friendly" prosthesis.
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Affiliation(s)
- Etienne Deroche
- Orthopaedic Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, Lyon, France.
| | - Cécile Batailler
- Orthopaedic Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, Lyon, France
| | - John Swan
- Orthopaedic Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, Lyon, France
| | - Elliot Sappey-Marinier
- Orthopaedic Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, Lyon, France
| | | | - Elvire Servien
- Orthopaedic Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, Lyon, France.,LIBM-EA 7424, Interuniversity Laboratory of Biology of Mobility, Claude Bernard Lyon 1 University, Lyon, France
| | - Sébastien Lustig
- Orthopaedic Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, Lyon, France.,Univ Lyon, Claude Bernard Lyon 1 University, IFSTTAR, LBMC UMR_T9406, 69622, Lyon, France
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Wilder JH, Patel AH, Ross BJ, Weldy JM, Wang H, Sherman WF. Fracture Risk With Patella Resurfacing During Total Knee Arthroplasty After Anterior Cruciate Ligament Reconstruction Using Bone-Patella-Bone Autograft: A Biomechanical Analysis. Arthroplast Today 2022; 13:142-148. [PMID: 35106351 PMCID: PMC8784308 DOI: 10.1016/j.artd.2021.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/09/2021] [Accepted: 10/25/2021] [Indexed: 11/04/2022] Open
Abstract
Background Anterior cruciate ligament (ACL) tears are common injuries. Ipsilateral bone patellar tendon bone (BPTB) autograft has been frequently used for ACL reconstructions. A large percentage of patients who sustain ACL ruptures develop early osteoarthritis and require total knee arthroplasty (TKA). When patients with previous BPTB autograft for an ACL tear undergo TKA, there may be an increased risk of fracture after patellar resurfacing. Methods There were 20 artificial Sawbones and 10 cadaveric patellae resurfaced. To simulate the presence of a previous BPTB autograft, a bone plug was removed from the anterior surface of the patellae and was resurfaced with a cemented patellar button. Biomechanical testing was performed to determine the compressive load to fracture of patellae with and without previous BPTB autograft. Results The average maximum load to failure for the artificial Sawbones patellae without a previous BPTB autograft was 4551.40 N ± 753.12 compared with 2855.39 N ± 531.46 with a previous BPTB autograft (P < .001). The average maximum load to failure for the cadaveric patellae without a previous BPTB autograft was 7256.37 N ± 1473.97 compared with 5232.22 N ± 475.04 with a previous BPTB autograft (P = .021). Conclusions The results demonstrate a significantly lower maximum load to failure of a resurfaced patella in the presence of a previous BPTB autograft. This can be used to aid in the decision of whether to resurface the patellae in these patients and to educate patients that the presence of a previous BPTB autograft may be an increased risk factor for patella fracture after TKA.
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Eichler D, Vendittoli PA. Double-layered patella management in total knee arthroplasty for secondary osteoarthritis: a case report. J ISAKOS 2022; 7:99-105. [DOI: 10.1016/j.jisako.2022.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/20/2022] [Accepted: 01/27/2022] [Indexed: 10/19/2022]
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Patel J, Hourston G, McDonnell SM. A Study Investigating Whether BMI Is Associated With Acetabular Bone Size: Big Bones or a Big Myth? Cureus 2021; 13:e19766. [PMID: 34950545 PMCID: PMC8687600 DOI: 10.7759/cureus.19766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/20/2021] [Indexed: 11/18/2022] Open
Abstract
Background There is a common conception held by patients with a high body mass index (BMI) that they have “big bones”. Some people hold the assumption that their weight is attributed to larger bone stock rather than adipose tissue. It was the suspicion of the surgeons at our unit that this is often not the case. We therefore conducted a study investigating if there is any association between BMI and acetabular bone size. Methods We conducted a retrospective chart review of all patients undergoing total hip arthroplasty using the Trident acetabular system from Stryker at our tertiary level 1 trauma centre between September 2016 and August 2020. Patient demographic and surgical data were collected, and the association of BMI, height, and weight, with acetabular cup size was investigated using Pearson’s correlation coefficient and chi-square test for independence. Results A total of 418 patients were included in this study (52.4% female; age: 20-93 years; mean age: 62.51 years), with a mean BMI of 29.55 kg/m2(range: 14.95-52.32 kg/m2). A weak positive association between BMI and cup size, which was statistically significant (r = 0.107; n = 418; p = 0.02). The chi-square test for independence was used to study the association between obesity and cup size (large vs small), which demonstrated no significant difference (p = 0.08). There was a moderately strong positive association between height and cup size (r = 0.551; n = 418; p < 0.01). There was a weak positive association between weight and cup size, which was statistically significant (r = 0.355; n = 418; p < 0.01). Conclusion Our study suggests that there is indeed a weakly positive linear association between BMI and cup size among total hip arthroplasty patients. This effect was, however, more significant for height and weight, and there was no significant association between obese and non-obese groups with small versus large cup size implanted. We therefore conclude that clinically there is no significant relationship between obesity and acetabular bone size and that the “big bones” claim is indeed fallacious.
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Affiliation(s)
- Jaison Patel
- Department of Trauma and Orthopaedic Surgery, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, GBR
| | - George Hourston
- Department of Trauma and Orthopaedics, James Paget University Hospitals NHS Foundation Trust, Great Yarmouth, GBR
| | - Stephen M McDonnell
- Department of Trauma and Orthopaedic Surgery, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, GBR
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McConaghy K, Derr T, Molloy RM, Klika AK, Kurtz S, Piuzzi NS. Patellar management during total knee arthroplasty: a review. EFORT Open Rev 2021; 6:861-871. [PMID: 34760286 PMCID: PMC8559560 DOI: 10.1302/2058-5241.6.200156] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The optimal management of the patella during total knee arthroplasty (TKA) remains controversial and surgeons tend to approach the patella with one of three general mindsets: always resurface the patella, never resurface the patella, or selectively resurface the patella based on specific patient or patellar criteria. Studies comparing resurfacing and non-resurfacing of the patella during TKA have reported inconsistent and contradictory findings. When resurfacing the patella is chosen, there are a number of available patellar component designs, materials, and techniques for cutting and fixation. When patellar non-resurfacing is chosen, several alternatives are available, including patellar denervation, lateral retinacular release, and patelloplasty. Surgeons may choose to perform any of these alone, or together in some combination. Prospective randomized studies are needed to better understand which patellar management techniques contribute to superior postoperative outcomes. Until then, this remains a controversial topic, and options for patellar management will need to be weighed on an individual basis per patient.
Cite this article: EFORT Open Rev 2021;6:861-871. DOI: 10.1302/2058-5241.6.200156
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Affiliation(s)
- Kara McConaghy
- Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Tabitha Derr
- Implant Research Core, School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA
| | - Robert M Molloy
- Cleveland Clinic, Department of Orthopedic Surgery, Cleveland, Ohio, USA
| | - Alison K Klika
- Cleveland Clinic, Department of Orthopedic Surgery, Cleveland, Ohio, USA
| | - Steven Kurtz
- Implant Research Core, School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA.,Exponent, Philadelphia, Pennsylvania, USA
| | - Nicolas S Piuzzi
- Cleveland Clinic, Department of Orthopedic Surgery, Cleveland, Ohio, USA
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Cao L, Sun K, Yang H, Wang H, Zeng R, Fan H. Influence of Patellar Morphology Classified by Wiberg Classification on Knee Joint Function and Patellofemoral Tracking After Total Knee Arthroplasty Without Patellar Resurfacing. J Arthroplasty 2021; 36:3148-3153. [PMID: 33962823 DOI: 10.1016/j.arth.2021.04.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 03/06/2021] [Accepted: 04/13/2021] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND To evaluate the influence of patellar morphology on knee joint function and patellofemoral tracking in patients with primary osteoarthritis after total knee arthroplasty (TKA) without patellar resurfacing. METHODS We performed a retrospective study of 156 patients with primary osteoarthritis who underwent TKA without patellar resurfacing from April 2018 to July 2019. As per Wiberg classification, patients were divided into Wiberg type I (group A, n = 38), II (group B, n = 88), and III (group C, n = 30) groups. The clinical data, postoperative follow-up data, and radiological data between three groups were compared. RESULTS There was no statistically significant difference in the HSS score and Feller score between the three groups before surgery and at each follow-up point after surgery (P > .05). At the last follow-up, there were no significant differences in the height and relative thickness of the patella between the three groups (P > .05). However, the incidence of anterior knee pain was significantly higher in group C than in the group B (P < .05). The patellar tilt angle was significantly larger in group C than in the groups A and B (both P < .05). The patellar facet angle was significantly larger in group A than in group B and C, which was also significantly larger in group B than in group C (both P < .05). CONCLUSION Patients with three different morphologic types of the patella both exhibited improved knee joint function after TKA, however, patients with Wiberg type Ⅲ patella were more prone to have poor patellofemoral tracking and anterior knee pain after surgery.
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Affiliation(s)
- Le Cao
- Department of Orthopaedics, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui Province, China
| | - Kai Sun
- Department of Orthopaedics, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui Province, China
| | - Haitao Yang
- Department of Orthopaedics, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui Province, China
| | - Hanbang Wang
- Department of Orthopaedics, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui Province, China
| | - Ran Zeng
- Department of Intensive Care Unit, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui Province, China
| | - Haitao Fan
- Department of Orthopaedics, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui Province, China
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Ko DO, Lee S, Kim JH, Hwang IC, Jang SJ, Jung J. The Influence of Femoral Internal Rotation on Patellar Tracking in Total Knee Arthroplasty Using Gap Technique. Clin Orthop Surg 2021; 13:352-357. [PMID: 34484628 PMCID: PMC8380535 DOI: 10.4055/cios20168] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/19/2020] [Accepted: 09/28/2020] [Indexed: 12/15/2022] Open
Abstract
Backgroud Femoral internal rotation in total knee arthroplasty (TKA) is well known as one of the main causes of patellar maltracking. Although femoral internal rotation in TKA is considered unacceptable due to the risk of patellar maltracking, it is sometimes required for ligament balancing. We evaluated the influence of femoral internal rotation on patellar tracking in TKA performed using the gap technique. Methods From April 2008 to May 2018, 1,612 cases of TKA were done. Among them, 245 cases of TKA for osteoarthritis were followed up for at least 1 year and included in this study. We compared patellar tracking in two groups; group I consisted of 99 cases whose femoral rotation was less than 0° and group II consisted of 146 cases whose femoral rotation was 3°-5° external rotation. Preoperative femoral rotation was measured with the condylar twist angle (CTA) by using computed tomography. The patella was replaced in all cases. Patellar tracking was evaluated with patellar tilt angle (lateral tilt [+] and medial tilt [-]) in the merchant radiograph. Statistical analysis was done using Mann-Whitney U-test. Clinical assessment was performed using the Knee Society clinical rating system. Results The preoperative CTA was 5.3° ± 1.6° in group I and 5.4° ± 1.6° in group II, showing no statistically significant difference between groups (p = 0.455). Intraoperative femoral rotation was -0.5° ± 0.8° in group I and 3.9° ± 0.8° in group II when the gap technique was used (p < 0.001). The postoperative patellar tilt angle was -0.4° ± 3.6° in group I and 0.1° ± 4.1° in group II with no statistically significant difference (p = 0.251). Conclusions Compared with femoral external rotation, femoral internal rotation with ligament balance in TKA was not more associated with patellar maltracking. Therefore, patellar tracking might be related with ligament balance in flexion regardless of the anatomic femoral rotational alignment.
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Affiliation(s)
- Dong Oh Ko
- Department of Orthopedic Surgery, Seoul Sacred Heart General Hospital, Seoul, Korea
| | - Song Lee
- Department of Orthopedic Surgery, Seoul Sacred Heart General Hospital, Seoul, Korea
| | - Jin Hak Kim
- Department of Orthopedic Surgery, Seoul Sacred Heart General Hospital, Seoul, Korea
| | - Il Chan Hwang
- Department of Orthopedic Surgery, Seoul Sacred Heart General Hospital, Seoul, Korea
| | - Sung Jun Jang
- Department of Orthopedic Surgery, Seoul Sacred Heart General Hospital, Seoul, Korea
| | - Jin Jung
- Department of Orthopedic Surgery, Seoul Sacred Heart General Hospital, Seoul, Korea
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Sherman WF, Freiberger C. Use of Fulcrum Positioning as a Balancing Tool During Total Knee Arthroplasty on a Robotic Platform. Arthroplast Today 2021; 8:176-180. [PMID: 33869700 PMCID: PMC8042414 DOI: 10.1016/j.artd.2021.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 12/23/2020] [Accepted: 03/01/2021] [Indexed: 11/28/2022] Open
Abstract
Total knee arthroplasty is a common procedure performed to improve pain and dysfunction attributed to arthritis, yet postoperative patient dissatisfaction rates remain relatively high. Patient satisfaction and outcomes have been linked to successful joint gap balancing in the coronal and sagittal planes intraoperatively. In previously described balancing techniques, the fulcrum used for alignment changes is customarily centered on the intramedullary axis generating symmetric changes in medial and lateral gaps. We propose a novel technique in the literature that, with the use of robotic-arm assisted technology or similar systems, allows manipulation of the fulcrum center of rotation during pre-resection planning and intraoperative gap establishment before bony cuts to asymmetrically influence medial and lateral, flexion and extension gaps to aid in balancing during total knee arthroplasty.
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Affiliation(s)
- William F Sherman
- Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, LA, USA
| | - Christina Freiberger
- Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, LA, USA
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Yu Z, Cai H, Yang B, Yao J, Zhang K, Tian H, Liu Z. Relationship between patellofemoral finite helical axis and femoral trans-epicondylar axis using a static magnetic resonance-based methodology. J Orthop Surg Res 2021; 16:212. [PMID: 33761974 PMCID: PMC7988974 DOI: 10.1186/s13018-021-02328-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 03/01/2021] [Indexed: 01/14/2023] Open
Abstract
Background To manage patellofemoral joint disorders, a complete understanding of the in vivo patellofemoral kinematics is critical. However, as one of the parameters of joint kinematics, the location and orientation of the patellofemoral finite helical axis (FHA) remains unclear. The purpose of this study is to quantify the location and orientation of the patellar FHA, both in vivo and non-invasively at various flexion angles, and evaluate the relationship of the FHA and the trans-epicondylar axis (TEA). Methods The magnetic resonance (MR) images of 18 unilateral knees were collected at full extension, 30°, 60°, 90°, and maximum angle of knee flexion. Three-dimensional models of the knee joint at different flexion angles were created using the MR images, and then used to calculate the patellar tracking and FHA with a spline interpolation algorithm. By using a coordinate system based on the TEA, the FHA tracking was quantified. Six parameters concerning the location and orientation of the patellar FHA were analysed. Results The average patellar FHA drew an L-shaped tracking on the midsagittal plane moving from the posteroinferior to the anterosuperior side of the TEA with knee flexion. Before 90° flexion, the patellar rotational radius decreased slightly, with an average value of 5.65 ± 1.09 cm. During 20° to 90° knee flexion, the average angle between the patellar FHA and the TEA was approximately 10° and that between the FHA and the coronal plane was maintained at about 0°, while that between the FHA and the level plane fluctuated between − 10° and 10°. Conclusions This study quantitatively reported the continuous location and direction of the patellar FHA during knee flexion. The patellar FHA was close to but not coincident with the femoral TEA both in location and orientation, and the patellar rotational radius decreased slightly with knee flexion. These findings could provide a clear direction for further studies on the difference in patellofemoral FHA among various types of patellofemoral disorders, and provide a foundation for the application of FHA in surgical evaluation, preoperative planning and prosthesis design, thereby assisting in the diagnosis and treatment of patellofemoral disorders. Supplementary Information The online version contains supplementary material available at 10.1186/s13018-021-02328-2.
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Affiliation(s)
- Zhenguo Yu
- Department of Orthopedics, Peking University Third Hospital, No.49 North Garden Road, Haidian District, Beijing, 100191, China
| | - Hong Cai
- Department of Orthopedics, Peking University Third Hospital, No.49 North Garden Road, Haidian District, Beijing, 100191, China.
| | - Bin Yang
- Department of Orthopedics, Peking University International Hospital, Life Park 1, Zhongguancun Life Science Park, Changping District, Beijing, 102206, China.
| | - Jie Yao
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beijing Advanced Innovation Centre for Biomedical Engineering, Beihang University, No.37 Xueyuan Road, Haidian District, Beijing, 100191, China.
| | - Ke Zhang
- Department of Orthopedics, Peking University Third Hospital, No.49 North Garden Road, Haidian District, Beijing, 100191, China
| | - Hua Tian
- Department of Orthopedics, Peking University Third Hospital, No.49 North Garden Road, Haidian District, Beijing, 100191, China
| | - Zhongjun Liu
- Department of Orthopedics, Peking University Third Hospital, No.49 North Garden Road, Haidian District, Beijing, 100191, China
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Noh JH, Kim NY, Song KI. Intraoperative patellar maltracking and postoperative radiographic patellar malalignment were more frequent in cases of complete medial collateral ligament release in cruciate-retaining total knee arthroplasty. Knee Surg Relat Res 2021; 33:9. [PMID: 33743836 PMCID: PMC7981897 DOI: 10.1186/s43019-021-00091-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 03/01/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Patellar maltracking after total knee arthroplasty (TKA) can lead to significant patellofemoral complications such as anterior knee pain, increased component wear, and a higher risk of component loosening, patellar fracture, and instability. This study was to investigate the preoperative and operative variables that significantly affect patellar tracking after cruciate-retaining TKA. METHODS We studied 142 knee joints in patients who had undergone TKA: the knees were dichotomized based on postoperative patellar tracking, which was evaluated on patellar skyline, axial-projection radiographs: group 1, normal patellar tracking (lateral tilt ≤ 10° and displacement ≤ 3 mm) and group 2, patellar maltracking (lateral tilt > 10° or displacement > 3 mm). The patients' demographic data and clinical and radiographic measurements obtained before and after surgery were compared between the two groups. RESULTS Preoperative lateral patellar displacement was greater (4.1 ± 2.6 mm vs. 6.0 ± 3.5 mm), as was the frequency of medial collateral ligament (MCL) release (3/67 vs. 24/75) in group 2 than in group 1 (p < 0.001 and p < 0.001, respectively). The distal femur was cut in a greater degree of valgus in group 1 than in group 2. (6.3 ± 0.8° vs. 6.0 ± 0.8°) (p = 0.034). CONCLUSIONS Complete release of the MCL during surgery was associated with patellar maltracking (logistic regression: p = 0.005, odds ratio = 20.592). Surgeons should attend to patellar tracking during surgery in medially tight knees. LEVEL OF EVIDENCE Retrospective comparative study, level III.
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Affiliation(s)
- Jung Ho Noh
- Department of Orthopaedic Surgery, Kangwon National University School of Medicine, 1 Gangwondaehak-gil, Chuncheon-si, Gangwon-do, 24341, South Korea.
| | - Nam Yeop Kim
- Department of Orthopaedic Surgery, Kangwon National University Hospital, Chuncheon-si, South Korea
| | - Ki Ill Song
- Department of Orthopaedic Surgery, Kangwon National University Hospital, Chuncheon-si, South Korea
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Parsons T, Al-Jabri T, Clement ND, Maffulli N, Kader DF. Patella resurfacing during total knee arthroplasty is cost-effective and has lower re-operation rates compared to non-resurfacing. J Orthop Surg Res 2021; 16:185. [PMID: 33706779 PMCID: PMC7948323 DOI: 10.1186/s13018-021-02295-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 02/10/2021] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND The decision to resurface the patella as part of total knee arthroplasty may be influenced by the surgeon's preference, education, training, tradition and geographic location. Advocates for non-resurfacing or selectively resurfacing may claim no difference in patient reported outcomes, and that resurfacing is associated with increased risks such as extensor mechanism injury or malalignment, problems with the design of the patella component and technical issues intraoperatively. AIMS To critically examine factors that should be considered in addition to patient reported outcomes in the decision process of resurfacing or non-resurfacing of the patella in total knee arthroplasty. METHOD A comprehensive literature search was conducted to identify factors that may influence decision making in addition to knee specific patient reported outcome measures such as surgical risks, patient quality of life, procedure cost, re-operation rate, implant design, surgeons learning curve and the fate of remaining cartilage in native patellae. RESULTS Patient-reported outcomes are equivocal for resurfacing and non-resurfacing. Critical analysis of the available literature suggests that the complications of resurfacing the patella are historic, which is now lower with improved implant design and surgical technique. Routine resurfacing was cost-effective in the long term (potential saving £104 per case) and has lower rates of revision (absolute risk reduction 4%). Finally, surgical judgment in selective resurfacing was prone to errors. CONCLUSION Patella resurfacing and non-resurfacing had similar patient-reported outcomes. However, patella resurfacing was cost-effective and was associated with a lower rate of re-operation compared to non-resurfacing.
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Affiliation(s)
- Thomas Parsons
- South West London Elective Orthopaedic Centre, Denbies Wing, Epsom General Hospital, Surrey, KT18 7EG UK
- Royal United Hospital Bath, Combe Park, Bath, Avon BA1 3NG UK
| | - Talal Al-Jabri
- Department of Surgery and Cancer, Imperial College London, London, SW7 2AZ England
| | - Nick D. Clement
- South West London Elective Orthopaedic Centre, Denbies Wing, Epsom General Hospital, Surrey, KT18 7EG UK
- Department of Orthopaedics, Royal Infirmary of Edinburgh, Little France, Edinburgh, EH16 4SA UK
| | - Nicola Maffulli
- Department of Medicine, Surgery and Dentistry, University of Salerno, Via S. Allende, 84081 Baronissi, SA Italy
- Queen Mary University of London, Barts and the London School of Medicine and Dentistry, Centre for Sports and Exercise Medicine, Mile End Hospital, 275 Bancroft Road, London, E1 4DG England
- School of Pharmacy and Bioengineering, Keele University School of Medicine, Stoke on Trent, ST5 5BG UK
| | - Deiary F. Kader
- South West London Elective Orthopaedic Centre, Denbies Wing, Epsom General Hospital, Surrey, KT18 7EG UK
- University of Kurdistan Hewler, Erbil, Iraq
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Beck CM, Nwannunu BI, Teigen KJ, Wagner RA. Biomechanical Study of Patellar Component Fixation with Varying Degrees of Bone Loss. J Arthroplasty 2021; 36:739-743. [PMID: 32978021 DOI: 10.1016/j.arth.2020.08.044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/06/2020] [Accepted: 08/21/2020] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND The decision as to whether or not to resurface the patella in revision total knee arthroplasty (TKA) is affected by the amount of patellar bone stock remaining; however, the impact of the cancellous bone status on patellar component fixation has not been studied. Therefore, we conducted a biomechanical study of patellar component fixation with varying degrees of cancellous bone loss. METHODS Sixty pairs of cadaveric patellae were randomly assigned between 3 groups and prepared in similar manner to a TKA with the standard 3-hole configuration. A control patella and an experimental patella were designated in each pair. To simulate bone loss in the experimental patellae, 1, 2, and 3 of the standard drill holes were uniformly enlarged to 12 mm in group 1, group 2, and group 3, respectively. Afterward, an all-polyethylene patellar component was cemented to each patella, as done intraoperatively. Patellar components were then sheared off using a materials testing system. The resulting mean offset yield force was analyzed within each group using paired t-tests. RESULTS The mean offset yield force for the control patellae was greater than the experimental patellae in group 1. In groups 2 and 3, the experimental patellae produced a greater mean offset yield force than the control patellae. Comparison within each group did not demonstrate a statistically significant difference. CONCLUSION Bone loss with enlargement of the patellar fixation holes, as is frequently seen in revision TKA, with holes up to 12 mm, does not significantly decrease patellar component fixation shear strength in this biomechanical cadaveric study.
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Affiliation(s)
- Cameron M Beck
- Texas College of Osteopathic Medicine, University of North Texas Health Science Center, Fort Worth, TX
| | - Brian I Nwannunu
- Department of Orthopaedic Surgery, John Peter Smith Hospital, Fort Worth, TX
| | - Kari J Teigen
- Office of Clinical Research, John Peter Smith Hospital, Fort Worth, TX
| | - Russell A Wagner
- Texas College of Osteopathic Medicine, University of North Texas Health Science Center, Fort Worth, TX; Department of Orthopaedic Surgery, John Peter Smith Hospital, Fort Worth, TX
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Yuan M, Ding Z, Ling T, Zhou Z. Patellar Denervation with Electrocautery Reduces Anterior Knee Pain within 1 Year after Total Knee Arthroplasty: A Meta-Analysis of Randomized Controlled Trials. Orthop Surg 2021; 13:14-27. [PMID: 33354916 PMCID: PMC7862158 DOI: 10.1111/os.12735] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 06/02/2020] [Accepted: 06/03/2020] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE The effect of patellar denervation with electrocautery (PD) on anterior knee pain (AKP) after total knee arthroplasty (TKA) is still debated. The aim of this meta-analysis was to evaluate the current evidence regarding the use of PD in TKA without patellar resurfacing. METHODS A computerized search of published studies was performed in the PubMed, Embase and Cochrane Library databases in December 2019. Eligible studies were randomized controlled trials (RCTs) comparing clinical outcomes of the PD group and the non-PD group. Subgroup analyses were carried out according to the follow-up time (3, 12 months, and over 12 months) to evaluate whether the clinical effect of PD changed with time. RESULTS Ten RCTs were included in this meta-analysis. Pooled results showed a lower rate of AKP (Risk Ratio [RR] = 0.70; 95% confidence interval [CI], 0.50 to 0.97; P = 0.03) and a reduction in visual analogue scale (VAS) for AKP (mean difference, -0.37; 95% CI, -0.69 to -0.05; P = 0.02) in the PD group when compared to the non-PD group. Subgroup analyses found the differences in AKP incidence and VAS for AKP were significant at 3- and 12-month follow-up but not after 12-month follow-up. No significant difference was observed in functional scores between the two groups. No specific complication directly or indirectly related to PD was found. CONCLUSION PD can decrease the incidence and severity of AKP within 12 months after TKA, but the effect cannot be maintained after 12-month follow-up. Without significant associated complication and reoperation, the use of PD is still recommended in TKA without patellar resurfacing.
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Affiliation(s)
- Ming‐cheng Yuan
- Department of OrthopedicsWest China Hospital/West China School of Medicine, Sichuan UniversityChengdu610041China
| | - Zi‐chuan Ding
- Department of OrthopedicsWest China Hospital/West China School of Medicine, Sichuan UniversityChengdu610041China
| | - Ting‐xian Ling
- Department of OrthopedicsWest China Hospital/West China School of Medicine, Sichuan UniversityChengdu610041China
| | - Zongke Zhou
- Department of OrthopedicsWest China Hospital/West China School of Medicine, Sichuan UniversityChengdu610041China
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Chapleau J, Sullivan T, Lambert B, Clyburn TA, Incavo SJ. Postoperative alignment in revision total knee arthroplasty, a comparison between intra and extra-medullary tibial alignment. Knee 2021; 28:319-325. [PMID: 33482622 DOI: 10.1016/j.knee.2020.12.013] [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: 07/30/2020] [Revised: 12/10/2020] [Accepted: 12/21/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND Revision total knee arthroplasty commonly involves stemmed components. If the diaphysis is engaged, this technique may be problematic for mechanical alignment (MA) in cases of tibial bowing, which are not infrequent (up to 30%). The aim of this study is to compare an intra-medullary(IM) and extra-medullary(EM) alignment method. We hypothesized that IM technique and canal-filling stems may result more frequently in valgus MA. On the other hand, an EM technique could produce less valgus knees but is at risk of creating MA outliers. METHOD A retrospective radiographic analysis of revision TKAs was performed. The patients were divided to either the EM or IM alignment group and compared on the overall post-operative MA. The following parameters were measured on standing, long leg x-rays: Hip-knee-Ankle angle (HKA), mechanical lateral distal femoral angle and mechanical medial proximal tibial angle (mMPTA). RESULTS 119 cases of revision TKAs were included (EM = 80, IM = 39). There was a difference between the EM and IM group for the mean mMPTA (89.94° vs 90.92°, effect size = 0.45, p = 0.013) and HKA angle (1.64° vs 0.05°, effect size = 0.52, p = 0.0064). A higher proportion of IM patients were in overall valgus alignment (16/39, 41%) vs EM group (16/80, 20%, p = 0.0134). Both techniques showed the same proportion of outliers, defined as HKA angle more than 5 degrees from neutral mechanical alignment (11/80 vs 5/39, p = 0.286). CONCLUSION The extra-medullary alignment method with short cemented stems creates less valgus mechanical alignment than the intra-medullary technique with press-fit stems, without creating more MA outliers.
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Affiliation(s)
- Julien Chapleau
- Department of Orthopedics and Sports Medicine, Houston Methodist Hospital, 6445 Main St., Outpatient Center, Suite 2500, Houston, TX 77030, United States
| | - Thomas Sullivan
- Department of Orthopedics and Sports Medicine, Houston Methodist Hospital, 6445 Main St., Outpatient Center, Suite 2500, Houston, TX 77030, United States.
| | - Bradley Lambert
- Department of Orthopedics and Sports Medicine, Houston Methodist Hospital, 6445 Main St., Outpatient Center, Suite 2500, Houston, TX 77030, United States.
| | - Terry A Clyburn
- Department of Orthopedics and Sports Medicine, Houston Methodist Hospital, 6445 Main St., Outpatient Center, Suite 2500, Houston, TX 77030, United States.
| | - Stephen J Incavo
- Department of Orthopedics and Sports Medicine, Houston Methodist Hospital, 6445 Main St., Outpatient Center, Suite 2500, Houston, TX 77030, United States.
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Govil G, Tomar L, Dhawan P. Peri-prosthetic trans-patellar fractures after Total knee Arthroplasty: a case series and review of literature. ARTHROPLASTY 2020; 2:35. [PMID: 35236458 PMCID: PMC8796498 DOI: 10.1186/s42836-020-00050-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 10/04/2020] [Indexed: 11/21/2022] Open
Abstract
Abstract Peri-prosthetic patella fracture is the second most common peri-prosthetic fracture after total knee arthroplasty. This report presented the treatment results in 6 patients with peri-prosthetic patella fractures. From January 2015 to February 2019, six patients with peri-prosthetic patella fractures were treated. The mean age at surgery was 64 years (range, 48–72 years). Four patients with displaced fractures were treated surgically, and two patients with non-displaced fractures were treated non-surgically. Outcomes were assessed in terms of motion, functional knee score, and Knee Society score. The mean follow-up period lasted 16 months (range: 12–20 months). The average arc of motion was 110° (range: 80°–130°). The mean functional knee score was 77 (range: 70–87). The mean Knee Society score was 84 (range: 75–89). The non-surgical treatment may be a good choice for non-displaced peri-prosthetic patella fractures. For displaced fractures, surgical treatments yielded good functional outcomes. Level of evidence IVa
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Benazzo F, Perticarini L, Jannelli E, Ivone A, Ghiara M, Rossi SMP. Controversy: supporting patellar resurfacing in total knee arthroplasty - do it. EFORT Open Rev 2020; 5:785-792. [PMID: 33312705 PMCID: PMC7722947 DOI: 10.1302/2058-5241.5.190075] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Patellar resurfacing during total knee arthroplasty remains a controversial topic.Some surgeons routinely resurface the patella to avoid the increased rates of postoperative anterior knee pain and reoperation for secondary resurfacing, whilst others selectively resurface based on the presence of preoperative anterior knee pain, damaged articular cartilage, inflammatory arthritis, isolated patellofemoral arthritis, and patellar subluxation and/or maltracking. A third group of surgeons never resurface the patella.The anatomy and biomechanics of the patellofemoral joint as well as the advances in surgical techniques and prosthetic design must be taken into account when making a decision about whether to resurface the patella. Accurate component implantation if the patella is resurfaced becomes crucial to avoid complications.In our institution before 2008 we were performing a selective resurfacing of the patella, but in the last decade we have decided to always resurface it, with good outcomes and low complication rate. A reproducible surgical technique may be helpful in reducing the risk of postoperative anterior knee pain and complications related to implants.In this article we analyse the current trend and controversial topics in dealing with the patella in total knee arthroplasty, and discuss the available literature in order to sustain our choice. Cite this article: EFORT Open Rev 2020;5:785-792. DOI: 10.1302/2058-5241.5.190075.
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Affiliation(s)
- Francesco Benazzo
- Sezione di Chirurgia Protesica ad Indirizzo Robotico - Unità di Traumatologia dello Sport, U.O Ortopedia e Traumatologia Fondazione Poliambulanza, Brescia, Lombardy, Italy.,Università degli Studi di Pavia, Pavia, Lombardy, Italy
| | - Loris Perticarini
- Sezione di Chirurgia Protesica ad Indirizzo Robotico - Unità di Traumatologia dello Sport, U.O Ortopedia e Traumatologia Fondazione Poliambulanza, Brescia, Lombardy, Italy
| | - Eugenio Jannelli
- Clinica Ortopedica e Traumatologia, Fondazione IRCCS Policlinico San Matteo - Pavia, Lombardy, Italy
| | - Alessandro Ivone
- Clinica Ortopedica e Traumatologia, Fondazione IRCCS Policlinico San Matteo - Pavia, Lombardy, Italy
| | - Matteo Ghiara
- Clinica Ortopedica e Traumatologia, Fondazione IRCCS Policlinico San Matteo - Pavia, Lombardy, Italy
| | - Stefano Marco Paolo Rossi
- Sezione di Chirurgia Protesica ad Indirizzo Robotico - Unità di Traumatologia dello Sport, U.O Ortopedia e Traumatologia Fondazione Poliambulanza, Brescia, Lombardy, Italy
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Wang Y, Feng W, Zang J, Gao H. Effect of Patellar Denervation on Anterior Knee Pain and Knee Function in Total Knee Arthroplasty without Patellar Resurfacing: A Meta-Analysis of Randomized Controlled Trials. Orthop Surg 2020; 12:1859-1869. [PMID: 33112040 PMCID: PMC7767783 DOI: 10.1111/os.12815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 07/05/2020] [Accepted: 08/25/2020] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVE The aim of the present study was to evaluate the effect of patellar denervation (PD) in preventing anterior knee pain (AKP) and improving knee function after total knee arthroplasty (TKA) without patellar resurfacing, and to help surgeons decide whether or not to use PD in TKA. METHODS The electronic databases of Pubmed, Embase, Cochrane, Web of Science, and Scopus were searched for all randomized controlled trials (RCT) comparing the outcomes of PD and no patellar denervation (NPD) in TKA without patellar resurfacing. Primary outcomes were incidence of AKP, visual analogue scale for pain (VAS), and patellar score (PS). Secondary outcomes were Knee Society Score (KSS), the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), the Oxford Knee Score (OKS), knee range of motion (ROM), and complications. RESULTS A total of nine RCT met the inclusion criteria. On meta-analysis, PD significantly reduced the incidence of AKP (odds ratio 0.49; 95% confidence interval [CI] 0.26 to 0.92), reduced the VAS (weighted mean difference [WMD] -0.57; 95% CI -1.02 to -0.11), and improved the WOMAC (WMD -4.63; 95% CI -6.49 to -2.77) and the ROM (WMD 9.60; 95% CI 0.39 to 18.81) during the follow-up within 12 months. In addition, PD improved the PS (WMD 1.01; 95% CI 0.65 to 1.38), KSS (WMD 1.12; 95% CI 0.10 to 2.14), and the WOMAC (WMD -1.41; 95% CI -2.74 to -0.08) during the follow-up after 12 months. CONCLUSION Patellar denervation could significantly reduce the VAS and the incidence of AKP in the early stages after TKA as well as improve the clinical outcomes in terms of the PS, the WOMAC, the KSS, and the ROM. This study demonstrates that PD is a safe and recommendable technique that could be routinely performed in TKA.
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Affiliation(s)
- Yuhang Wang
- Day Care Unit, The First Hospital of Jilin University, Changchun, China
| | - Wei Feng
- Department of Orthopaedics, The First Hospital of Jilin University, Changchun, China
| | - Junting Zang
- Department of Orthopaedics, The First Hospital of Jilin University, Changchun, China
| | - Hang Gao
- Department of Orthopaedics, The First Hospital of Jilin University, Changchun, China
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Harwin SF, DeGouveia W, Sodhi N, Gold PA, Garbarino LJ, Ehiorobo JO, Salem HS, Mont MA. Outcomes of Cementless-Backed Patellar Components. J Knee Surg 2020; 33:856-861. [PMID: 32483801 DOI: 10.1055/s-0040-1710378] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Because of the early follow-up positive outcomes with cementless fixation, continued evaluations need to be performed to ensure longer-term efficacy. Additionally, although many studies report on the results of femoral and tibial component fixation, few studies report specifically on patellar outcomes. Therefore, the purpose of this study was to report on the: (1) implant survivorship; (2) complications; and (3) radiographic outcomes in a large cohort of patients who received cementless total knee arthroplasties (TKAs), with particular attention to the patellar component. A total of 261 patients who underwent cementless TKA by a single, high-volume academic surgeon were studied. Patients had a mean age of 66 years and were distributed between 192 women (74%) and 69 men. All patients received the same cementless tibial, femoral, and patellar components. Mean follow-up period was 4.5 years (range, 4-5 years). Primary outcomes evaluated included all postoperative complications, with particular emphasis on the patellar component. Only one patellar loosened leading to a patellar aseptic loosening rate of 0.3% (1 of 261). The one patellar loosening was the component being dislodged after a manipulation under anesthesia (MUA) at 6 weeks. This was revised to a cemented component and the patient is doing well 4 years later. A second patient experienced a patellar tendon rupture, later surgically repaired. Another patient sustained a patella fracture that was managed nonoperatively. The fracture healed by 1 year and the patient continued to have an otherwise successful outcome, now at 2 years follow-up. No progressive radiolucencies, subsidence, or changes in initial postoperative axial alignment were observed at final follow-up. The results from this study highlight a 98% success rate at mean 4.5 years follow-up in a large cohort of patients with a diverse spread of demographic details. Specific to the patella, only one patient experienced an adverse event, which was managed nonoperatively. Therefore, based on this data, patellar fixation in cementless TKA can be considered a safe technique.
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Affiliation(s)
- Steven F Harwin
- Department of Orthopaedics, Mount Sinai Hospital West, New York, New York
| | - William DeGouveia
- Northwell Health Orthopaedics, Lenox Hill Hospital, New York, New York
| | - Nipun Sodhi
- Northwell Health Orthopaedics, Long Island Jewish Medical Center, New York, New York
| | - Peter A Gold
- Northwell Health Orthopaedics, Long Island Jewish Medical Center, New York, New York
| | - Luke J Garbarino
- Northwell Health Orthopaedics, Long Island Jewish Medical Center, New York, New York
| | - Joseph O Ehiorobo
- Northwell Health Orthopaedics, Lenox Hill Hospital, New York, New York
| | - Hytham S Salem
- Northwell Health Orthopaedics, Lenox Hill Hospital, New York, New York
| | - Michael A Mont
- Northwell Health Orthopaedics, Lenox Hill Hospital, New York, New York
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48
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Kim CW, Lee CR, Huh TY. The effect of patellar facet angle on patellofemoral alignment and arthritis progression in posterior-stabilized total knee arthroplasty without patellar resurfacing. Knee Surg Relat Res 2020; 32:29. [PMID: 32660603 PMCID: PMC7285713 DOI: 10.1186/s43019-020-00045-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 05/11/2020] [Indexed: 12/17/2022] Open
Abstract
Background The purpose of this study was to evaluate the effect of patellar facet angle on pre- and postoperative patellofemoral alignment and the progress of arthritis of the patellofemoral joint in posterior-stabilized total knee arthroplasty (PS TKA) without patellar resurfacing. Methods Patients who had a PS TKA for a varus osteoarthritic knee who were followed up for more than 2 years were included in this study. The radiologic and clinical outcomes were compared between 72 knees (group A) whose patellar facet angle was greater than 126° (> 126°) and 32 knees (group B) whose patellar facet angle was smaller than or equal to 126° (≤ 126°). For the radiologic assessment, the Kellgren-Lawrence grade, mechanical femorotibial angle, Insall-Salvati ratio, patellar tilt angle, patellar displacement and the osteosclerosis of the patellar ridge were evaluated. The range of motion (ROM) and patient-reported outcomes (the Knee Society knee score, the Knee Society function score, the Feller patellar score, and the Kujala patellofemoral score) were used for the clinical assessment. Results The preoperative patellar tilt angle was 9.8° (standard deviation [SD] 5.5) and 14.6° (SD 4.1) in group A and group B, respectively, a significant difference (p < 0.001). Other preoperative radiologic parameters and preoperative patient-reported outcomes and ROM showed no significant difference between the two groups (all parameters (p > 0.05). At the last-follow-up, 22 knees (30.6%) showed progression of osteosclerosis of the patellar ridge in group A and 13 knees (40.6%) showed progression of osteosclerosis in group B (p = 0.371). The postoperative radiologic and clinical outcomes showed no significant difference between the two groups (all parameters, p > 0.05). Conclusions Although a narrow patellar facet angle was related to an increase of lateral tilting of the patella, it showed no impact on the preoperative clinical assessment. The radiologic and clinical outcomes evaluated after the PS TKA showed no statistical difference according to the patellar shape. Although the patellar shape evaluated by the patellar facet angle can partially affect the preoperative patellofemoral alignment, this study result indicated insignificant clinical relevance of the patellar shape in the PS TKA.
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Affiliation(s)
- Chang-Wan Kim
- Department of Orthopedic Surgery, Inje University Busan Paik Hospital, 75, Bokji-ro, Busanjin-gu, Busan, 47392, South Korea
| | - Chang-Rack Lee
- Department of Orthopedic Surgery, Inje University Busan Paik Hospital, 75, Bokji-ro, Busanjin-gu, Busan, 47392, South Korea.
| | - Tae-Yung Huh
- Department of Orthopedic Surgery, Inje University Busan Paik Hospital, 75, Bokji-ro, Busanjin-gu, Busan, 47392, South Korea
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Revision total knee arthroplasty for patellar dislocation in patients with malrotated TKA components. Arch Orthop Trauma Surg 2020; 140:777-783. [PMID: 32372239 DOI: 10.1007/s00402-020-03468-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Indexed: 02/02/2023]
Abstract
PURPOSE Patellar dislocation is a serious complication leading to patient morbidity following total knee arthroplasty (TKA). The cause can be multifactorial. Extensor mechanism imbalance may be present and result from technical errors such as malrotation of the implants. We sought to understand the reasons for post-arthroplasty patellar dislocation and the clinical outcomes of patients in whom it occurs. METHODS This is a retrospective cohort study assessing the outcomes of revision surgery for patellar dislocation in patients with component malrotation in both primary and revision TKAs. Patient demographics, dislocation etiology, presurgical deformity, intraoperation component position, complications, reoperation, and Knee Society Scores (KSS) were collected. RESULTS Twenty patients (21 knees) were identified. The average time from primary arthroplasty to onset of dislocation was 33.6 months (SD 44.4), and the average time from dislocation to revision was 3.38 months (SD 2.81). Seventeen knees (80.9%) had internal rotation of the tibial component and seven knees (33.3%) had combined internal rotation of both the femoral and tibial components. Fifteen knees (71.4%) were treated with a condylar constrained implant at the time of revision, and five knees were converted to a hinged prosthesis. The average follow-up time was 56 months. During this time, one patient (4.54%) had a recurrent dislocation episode, requiring further surgery. At final follow up, the mean KSS was 86.2. CONCLUSION Revision TKA following patellar dislocation for patients with malrotated components was associated with high success rates. After revision surgery, patients had a low recurrence of patellar dislocation, low complication rates, and excellent functional outcomes.
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Peng L, Luo Y, Liu J, Li Z. The efficacy of patellar denervation with electrocautery after total knee replacement: A meta-analysis of randomized controlled trials. Int J Surg 2020; 78:126-137. [PMID: 32335235 DOI: 10.1016/j.ijsu.2020.04.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 04/01/2020] [Accepted: 04/16/2020] [Indexed: 01/11/2023]
Abstract
OBJECTIVE To evaluate the efficacy and safety of patellar denervation with electrocautery for reducing pain and improving clinical outcomes after total knee replacement. METHODS A comprehensive search was conducted across relevant databases, including PubMed, Scopus, EMBASE, Web of Science, and Cochrane Library databases on February 2020. Two researchers independently completed the literature screening, data extraction, and risk evaluation of bias. Outcome measures included visual analogue scale, opioid consumption, range of motion, patellar score, American Knee Society score, Oxford knee score and postoperative complications. STATA 13.0 software was applied for meta-analysis. RESULT A total of nine studies involving 1319 patients were included in our study. The present meta-analysis indicated that patellar denervation with electrocautery was associated with improved pain relief and decreased opioid consumption after total knee replacement. There was significant difference between groups in terms of knee range of motion. CONCLUSION Patellar denervation with electrocautery is effective in reducing pain and opioid consumption after total knee replacement. Postoperative range of motion is significantly better in patellar denervation group, which means that patellar denervation significantly improves clinical outcome.
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Affiliation(s)
- Lin Peng
- Department of Bone and Joint, Hospital Affiliated to Southwest Medical University, Sichuan Province, 646000, China
| | - Yuhao Luo
- Department of Medical Oncology, Hospital Affiliated to Southwest Medical University, Sichuan Province, 646000, China
| | - Juncai Liu
- Department of Bone and Joint, Hospital Affiliated to Southwest Medical University, Sichuan Province, 646000, China
| | - Zhong Li
- Department of Bone and Joint, Hospital Affiliated to Southwest Medical University, Sichuan Province, 646000, China.
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