Journal of Knee Surgery最新文献

{"title":"The Effect of Gracilis Tendon Preservation on Postoperative Knee Joint Stability and Muscle Strength in Arthroscopic Anterior Cruciate Ligament Reconstruction Surgery.","authors":"Mehmet Ekinci, Taha Bedir Demir, Turker Sahinkaya, Sertac Yakal, Gokhan Polat, Bulent Bayraktar","doi":"10.1055/s-0044-1787829","DOIUrl":"10.1055/s-0044-1787829","url":null,"abstract":"<p><p>The aim of our study is to evaluate preserving gracilis tendon in anterior cruciate ligament reconstruction (ACLR) surgery and its effect to the flexion of the knee joint and tibial internal rotation strength and the stability of the knee. Patients who underwent primary single-bundle arthroscopic ACLR using all-inside technique and using hamstring tendon autograft were evaluated retrospectively. Patients were divided into two groups as gracilis preserved (St) and gracilis harvested (StG) groups. The International Knee Documentation Committee (IKDC) score, Lysholm, Knee Injury and Osteoarthritis Outcome Score-Knee-related quality of life (KOOS-QOL) score, ACL-Return to Sport after Injury scale score were used to evaluate as postoperative functional scores at last follow-up. Anterior tibial translation was evaluated using the KT-1000 device. Knee joint flexion, extension, and internal rotation strength were evaluated using isokinetic dynamometer. Dynamic balance performances were measured using the Biodex Balance System. There were 24 patients in the St group and 23 patients in the StG group. Demographic data and clinical results showed no significant difference. Anteroposterior movement of the tibia was found to be significantly higher in the StG group than in the St group in measurements at 89 and 134 N, respectively (<i>p</i> = 0.01 and <0.001). No statistically significant difference was found between both standard and deep flexor and extensor and internal rotator strength. No statistically significant difference was found in the amount of total, anteroposterior, and mediolateral balance deficit between the two groups. Additional gracilis harvesting does not have a negative effect on both standard and deep knee flexion, and tibial internal rotation strength compared with the St group. Although semitendinosus and StG group showed significantly more anterior tibial translation, there was no significant difference in clinical and dynamic stability measurements.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":"843-850"},"PeriodicalIF":1.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141428033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Influence of Preimplant Balancing on Manipulation under Anesthesia Rates following Imageless Robotic-Assisted Total Knee Arthroplasty.","authors":"Justin T Butler, Samuel D Stegelmann, Trent Davis, Amy Singleton, Hunter Ostlie, Richard Miller, Kirk Davis","doi":"10.1055/a-2410-2668","DOIUrl":"10.1055/a-2410-2668","url":null,"abstract":"<p><p>Acquired idiopathic stiffness (AIS) following total knee arthroplasty (TKA) often requires manipulation under anesthesia (MUA). Robotic-assisted TKA (RA-TKA) systems provide gap balance templates for objective correlation with the rate of AIS. The purpose of this study was to assess intraoperative balancing parameters that were associated with MUA utilizing an \"anatomical\" implant design.We performed a retrospective chart review of 265 imageless RA-TKA procedures performed by R.M. and K.D. between 2018 and 2020. The primary outcome for AIS or clinically significant \"arthrofibrosis\" was MUA. Patient intraoperative gap planning data were examined for association.The rate of MUA was 8.7% (23/265), which was performed at a mean follow-up time of 75.9 ± 32.2 days. The lateral to medial gap difference in extension was significantly less in patients requiring MUA (odds ratio [OR] = 0.86, 95% confidence interval [CI], 0.75-0.99) (<i>p</i> = 0.034). Significantly less preoperative varus mechanical axis was associated with knees requiring MUA (1.83° vs. 4.04°, OR = 1.09, 95% CI, 1.00-1.19). Decreased templated mechanical axis correction was associated with MUA (2.09° vs. 4.75°, <i>p</i> < 0.0001).A tighter lateral-to-medial gap in extension, less preoperative varus, and smaller templated mechanical axis corrections were associated with increased rates of MUA.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142141523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors Associated with Return to Sport After Anterior Cruciate Ligament Reconstruction: A Focus on Athletes Who Desire Preinjury Level of Sport.","authors":"Yusuke Kawanishi, Makoto Kobayashi, Sanshiro Yasuma, Hiroaki Fukushima, Jiro Kato, Atsunori Murase, Tetsuya Takenaga, Masahito Yoshida, Gen Kuroyanagi, Yohei Kawaguchi, Hideki Murakami, Masahiro Nozaki","doi":"10.1055/a-2333-1490","DOIUrl":"10.1055/a-2333-1490","url":null,"abstract":"<p><p>In most previous studies investigating return to preinjury level of sport (RTPS) after anterior cruciate ligament reconstruction (ACLR), whether patients continue aiming for RTPS not only before but also after ACLR was unclear because environmental and social factors were not considered. Herein, we aimed to evaluate factors associated with RTPS among athletes who desired to achieve RTPS even after ACLR, excluding patients who no longer desire this goal owing to environmental and social factors. Ninety-two patients who underwent primary double-bundle ACLR with a minimum 2-year follow-up and desired to achieve RTPS before surgery were retrospectively enrolled. Twelve (13%) patients who no longer desired to achieve RTPS after ACLR owing to environmental and social factors were excluded. Sixty-nine patients were included in the final cohort. At the final follow-up, the patients were split into two groups: those who achieved (R group) or did not achieve (N group) RTPS based on patient self-assessment. The Knee Injury and Osteoarthritis Outcome Score (KOOS) and Lysholm scores were also determined. The anterior tibial translation in the Lachman test and acceleration and external rotational angular velocity (ERAV) in the pivot shift test were measured at the hardware removal operation. Significant differences were observed for preinjury level of sports between the groups (<i>p</i> < 0.05). The rate of RTPS in competitive athletes was lower than that in recreational athletes (20/46: 43% vs. 16/22: 73%; <i>p</i> =.037). Lysholm score, KOOS symptom, pain, and quality of life showed higher values in the R group than in the N group (<i>p</i> < 0.050). Acceleration was significantly lower in the R group than in the N group (<i>p</i> = 0.028). Competitive level of sports is a risk factor for failure to achieve RTPS. The postoperative functional outcomes in the group that achieved RTPS showed more favorable results. These results provide important information to enable the surgeons to consider the appropriate surgical plan for competitive athletes who desire to achieve RTPS after ACLR.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":"856-863"},"PeriodicalIF":1.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141093292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inflammatory Marker Changes Following Total Knee Arthroplasty for Rheumatoid Arthritis with Vancomycin-loaded Calcium Sulfate Bone Filling.","authors":"Han Zhang, Xiao Ma, GuanHong Chen, Ze Wang, Zhen Shang, Tianrui Wang, Tengbo Yu, Yongtao Zhang","doi":"10.1055/s-0044-1790243","DOIUrl":"https://doi.org/10.1055/s-0044-1790243","url":null,"abstract":"<p><p>Rheumatoid arthritis (RA) patients undergoing total knee arthroplasty (TKA) face infection risk. The study evaluates vancomycin-loaded calcium sulfate bone as infection prevention. Patients with RA treated with TKA who had their femoral canal filled using either vancomycin-loaded calcium sulfate bone (experimental group [<i>n</i> = 35]) or the patient's own excised autologous bone (control group [<i>n</i> = 30]) at the Qingdao University Affiliated Hospital, Qingdao, China from January 1, 2017, to March 1, 2023, were retrospectively enrolled in this study. An experienced surgeon used midvastus approach. Surgeries included disinfection, antibiotics, and femoral filling. The age, gender, body mass index (BMI), comorbidities, and intraoperative details were extracted from the patient's medical records. Preoperation and postoperation markers (C-reactive protein [CRP], erythrocyte sedimentation rate [ESR]), pain scale (Visual Analog Scale [VAS]), infection rate, and Knee Society Score (KSS) were collected. Groups matched in age, gender, and BMI. No preoperative inflammatory marker differences were observed. However, compared to the control group, the postoperative inflammatory markers were significantly lower in the experimental group at 1-week postsurgery (CRP: 40.80 ± 23.17 vs. 60.80 ± 43.12 mg/L, <i>p</i> = 0.021; ESR: 72.06 ± 17.52 vs. 83.87 ± 21.52 mm/h, <i>p</i> = 0.012) and at 1-month postsurgery (CRP: 15.63 ± 6.56 vs. 21.17 ± 13.16 mg/L, <i>p</i> = 0.032; ESR: 25.25 ± 20.44 vs. 38.40 ± 25.26 mm/h, <i>p</i> = 0.024). There were no significant differences in the VAS (2.79 ± 0.90 vs. 2.70 ± 0.84 score, <i>p</i> = 0.689) and KSS (64.31 ± 17.88 vs. 66.57 ± 12.36) at 1-month postsurgery. Experimental group: zero infections; control group: only one infection. Administering vancomycin and calcium sulfate during TKA in RA patients reduces postoperative inflammation, but does not significantly affect infection risk; further research may be necessary for validation.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"No Radiographic Evidence of Medial Collateral Ligament Elongation in Valgus Osteoarthritic Knees Enables Treatment with Kinematically Aligned Total Knee Arthroplasty.","authors":"Alexander J Nedopil, Anand Singh Dhaliwal, Antonio Klasan, Stephen M Howell, Maury L Hull","doi":"10.1055/a-2395-6831","DOIUrl":"10.1055/a-2395-6831","url":null,"abstract":"<p><p>When performing caliper-verified kinematically aligned total knee arthroplasty (KA TKA) in the osteoarthritic (OA) knee with valgus deformity, an elongated medial collateral ligament (MCL) could result in a valgus setting of the tibial component. The present study analyzed KA TKA in patients with valgus deformities (i.e., tibiofemoral angle > 10 degrees of valgus) and determined (1) the occurrence of radiographic MCL elongation, (2) the incidence of lateral collateral ligament (LCL) and posterior cruciate ligament (PCL) release and the use of constrained components, and (3) whether the 1-year Forgotten Joint Score (FJS), Oxford Knee Score (OKS), Knee Injury and Osteoarthritis Outcome Score for Joint Replacement (KOOS JR), and Likert satisfaction score were comparable to KA TKAs for OA deformities ≤10 degrees of valgus. One hundred and two consecutive patients who underwent KA TKA by a single surgeon were analyzed radiographically and clinically at a minimum follow-up of 1 year. Radiographic MCL elongation was identified by a greater than 1 degree of valgus orientation of the tibial component relative to the OA tibial joint line. Twenty-six patients had a radiographic anatomic tibiofemoral angle greater than 10 degrees of valgus (range of OA deformity: 11-23 degrees of valgus). Seventy-six had an OA deformity ≤10 degrees of valgus (10-degree valgus to -14-degree varus). No patient had MCL elongation or a ligament release, or required constrained components. The median FJS of 78, OKS of 42, and KOOS JR of 76, and the 85% satisfaction rate of the patients with greater than 10 degrees of OA valgus deformity were not significantly different from those with ≤10 degrees of OA valgus deformity (<i>p</i> ≥ 0.17). Because MCL elongation was not detected in OA deformities up to 23 degrees of valgus, the risk of under-correcting the valgus deformity leading to instability and poor outcome scores is low when performing KA TKA using primary components without releasing the LCL and/or PCL. LEVEL OF EVIDENCE::  IV.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142009761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Posterior Cruciate Ligament Preservation versus Posterior Cruciate Ligament Sacrifice: Comparing Patient Outcomes in Medial Congruent Total Knee Arthroplasty.","authors":"George N Guild, Mary J McConnell, Farideh Najafi, Brandon H Naylor, Charles A DeCook, Thomas L Bradbury","doi":"10.1055/a-2379-6488","DOIUrl":"10.1055/a-2379-6488","url":null,"abstract":"<p><p>This study aimed to compare outcomes and complication rates between posterior cruciate ligament (PCL) retention and excision utilizing a medial congruent (MC) polyethylene insert in total knee arthroplasty (TKA) in a specialized ambulatory surgery center (ASC) dedicated to hip and knee arthroplasty. A retrospective review was performed between May 2023 and October 2023 analyzing 398 patients who underwent primary MC TKA by high-volume joint arthroplasty surgeons (<i>n</i> = 9) with either PCL preservation (<i>n</i> = 264) or sacrifice (<i>n</i> = 134) in a single free-standing ASC. Patients were matched chronologically on a 2:1 basis. Demographics, baseline function, 90-day complications, and patient-reported outcomes were recorded for each patient. There were no differences in preoperative baseline function or patient-reported outcome measures, Charlson Comorbidity Index, or American Society of Anesthesiologists class among patient groups. The PCL-preserve and PCL-sacrifice cohorts showed significant variation in 12-week postoperative Knee Injury and Osteoarthritis Outcome, Junior (KOOS, JR.) scores. Specifically, the number of patients who achieved the minimal clinically important difference (MCID) in KOOS, JR. scores was higher in the PCL-sacrifice group (<i>p</i> < 0.05). Yet, no complications within the 90-day period were associated with PCL status and other patient-reported outcomes. This study comparing outcomes between MC TKAs with PCL retention and sacrifice suggests that both techniques are viable options with similar functional outcomes, pain scores, and complication rates, which may have benefits in an ASC setting. The PCL-sacrifice group exhibited a statistically significant increase in patients who achieved the MCID in KOOS, JR. score compared with the PCL-preserving at early follow-up. Future research should employ prospective, randomized designs to further validate these findings and explore long-term implications.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141894687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and Validation of a Mobile Phone Application for Measuring Knee Range of Motion.","authors":"Matthew F Gong, Logan E Finger, Christina Letter, Soheyla Amirian, Bambang Parmanto, Michael O'Malley, Brian A Klatt, Ahmad P Tafti, Johannes F Plate","doi":"10.1055/a-2388-0812","DOIUrl":"10.1055/a-2388-0812","url":null,"abstract":"<p><p>Knee range of motion (ROM) is an important indicator of knee function. Outside the clinical setting, patients may not be able to accurately assess knee ROM, which may impair recovery following trauma or surgery. This study aims to validate a smartphone mobile application developed to measure knee ROM compared to visual and goniometer ROM measurements. A knee ROM Android mobile application was developed to measure knee ROM. Patients ≥ 18 years old presenting to an orthopaedic clinic with native knee complaints were approached to participate. Knee ROM was measured bilaterally by an arthroplasty-trained surgeon using (1) vision, (2) goniometer, and (3) the mobile application. Measurements were compared in flexion and extension using a one-way analysis of variance with post hoc Tukey test (alpha = 0.05). Eighty-four knee ROM measurements (40 left, 44 right) were obtained in 47 patients. Median Kellgren-Lawrence grade from available radiographs was grade 3. In flexion, mobile application (117.6 ± 14.7 degrees) measurements were not significantly different from visual (116.1 ± 13.6 degrees) or goniometer (116.2 ± 13.6 degrees) measurements. In extension, mobile application (4.8 ± 7.3 degrees) measurements were significantly different from visual (1.9 ± 4.1 degrees) measurements on post hoc analysis (<i>p</i> < 0.01), while no differences were present compared to goniometer (3.1 ± 5.8 degrees) measurements. Our study found that a mobile application for evaluating knee ROM was noninferior to goniometer-based measurements performed by an arthroplasty-trained surgeon. Future studies will investigate this application's utility in (1) remote patient care, (2) accelerating recovery during rehabilitation, (3) detecting early postoperative complications including arthrofibrosis, and (4) adding additional functionalities to the application to provide more detail-oriented descriptive analyses of patient knee function.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141983655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boundaries in Kinematic Alignment: Why, When, and How.","authors":"Pier Francesco Indelli, Giuseppe Petralia, Stefano Ghirardelli, Pieralberto Valpiana, Giuseppe Aloisi, Andrea Giordano Salvi, Salvatore Risitano","doi":"10.1055/a-2395-6935","DOIUrl":"10.1055/a-2395-6935","url":null,"abstract":"<p><p>The use of alternative alignments in total knee arthroplasty (TKA) has recently been increasing in popularity: many of these alignments have been included in the broad spectrum of \"kinematic alignment.\" This alternative approach was recommended to increase patients' satisfaction since many studies based on patient-reported outcome measures (PROMs) showed that every fifth patient is not satisfied with the surgical outcome. In fact, the original kinematic alignment technique was designed as a \"pure resurfacing\" technique, maintaining the preoperative axes (flexion-extension and axial rotation) of the knee. In adjunct, many new classifications of the preoperative limb deformity have been proposed to include a large range of knee anatomies, few of them very atypical. Following those classifications, many surgeons aimed for a reproduction of unusual anatomies putting in jeopardy the survivorship of the implant according to the classical \"dogma\" of a poor knee kinematics and TKA biomechanics if the final hip-knee-ankle (HKA) axis was not kept within 5 degrees from neutral. This article reviews the literature supporting the choice of setting alignment boundaries in TKA when surgeons are interested in reproducing the constitutional knee anatomy of the patient within a safe range.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142009760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Patellar Tendon Ruptures after Total Knee Arthroplasty.","authors":"Gabrielle Swartz,Sean Bonanni,Daniel Hameed,Jeremy Dubin,Sandeep S Bains,Deepak V Patel,Michael A Mont,Ronald E Delanois,Giles R Scuderi","doi":"10.1055/a-2413-3962","DOIUrl":"https://doi.org/10.1055/a-2413-3962","url":null,"abstract":"Patellar tendon rupture following total knee arthroplasty (TKA) is a rare, but devastating complication. These injuries occur most frequently in the acute period following TKA due to trauma to the knee. Patellar tendon ruptures that disrupt the extensor mechanism create a marked functional deficit, impacting every facet of daily life. In complete ruptures of the patellar tendon, repair or reconstruction is typically indicated; however, complication rates following intervention remain high, between 25 to 63%. Operative intervention remains the mainstay of treatment, with only certain specific situations where nonoperative intervention is appropriate. Operative treatments include repair with or without augmentation or reconstruction. Augmentation does reduce the high risk of complications, bringing rates down from 63 to 25%. Augmentation options include autografts, allografts, synthetic grafts, or synthetic meshes. Despite advancements, outcomes are unpredictable, and complications are common, highlighting the need for further research to improve treatment protocols. Operative techniques are chosen based on the acuity, location of disruption, and status of the residual soft tissues. This article provides an overview of patellar tendon ruptures following TKA, the various treatment options, and the recommendations of the senior authors for each common type of patellar tendon injury encountered.","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":"5 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Does Resurfacing the Patella Increase the Risk of Extensor Mechanism Injury Within the First Two Years After Total Knee Arthroplasty?","authors":"David E DeMik,Juan David Lizcano,Emily Jimenez,Kyle Mullen,Jess H Lonner,Chad A Krueger","doi":"10.1055/a-2413-3876","DOIUrl":"https://doi.org/10.1055/a-2413-3876","url":null,"abstract":"Background Extensor mechanism injury (EMI) following total knee arthroplasty (TKA) is a potentially catastrophic complication and may lead to significant morbidity or need for revision reconstructive procedures. Patella resurfacing (PR), while commonly performed during TKA, reduces overall patella bone stock and may increase the risk of EMI after TKA. The purpose of this study was to assess if patellar resurfacing (PR) in elderly patients raises the risk for subsequent EMI. Methods The American Joint Replacement Registry (AJRR) was queried to identify Medicare patients ≥65 years old undergoing primary elective TKA for osteoarthritis between January 2012 and March 2020. Patient age, sex, and Charlson Comorbidity Index (CCI) were collected. Records were subsequently merged with Medicare claims records and evaluated for the occurrence of patella fracture, quadriceps tendon rupture, or patellar tendon rupture based on ICD-9/10 diagnosis codes within 2 years of TKA. Patients were stratified based on whether PR occurred or not (NR). Logistic regression was used to determine the association between PR and EMI. Results A total of 453,828 TKA were eligible for inclusion and 428,644 (94.45%) underwent PR. The incidence of PR decreased from 96.06% in 2012 to 92.35% in 2022 (p<0.001). Patients undergoing PR were more often female (60.93% vs 58.50%; p<0.001) and had a lower mean CCI (3.09 [1.10] vs. 3.16 [1.20]; p<0.001). Odds for EMI did not differ based on whether PR was performed (OR: 0.85 [0.65-1.11]; p=0.2246). Increasing age (OR: 1.06 [1.05-1.07], p<0.0001]) and CCI (OR: 1.06 [0.95-1.19], p=0.0009) were associated with EMI. Conclusions PR is commonly performed during TKA in the United States and was not found to increase odds for EMI within 2 years of TKA in patients ≥65 years old. Increased age and medical comorbidity were associated with higher odds for subsequent EMI.","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":"57 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142205693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}