{"title":"Letter to the Editor on \"A Longitudinal Analysis of Weight Changes before and after Total Knee Arthroplasty: Weight Trends, Patterns, and Predictors\".","authors":"Daniel L Riddle","doi":"10.1055/a-2411-0835","DOIUrl":"10.1055/a-2411-0835","url":null,"abstract":"","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":"51-52"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142146621","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}
Justin T Butler, Samuel D Stegelmann, Trent Davis, Amy Singleton, Hunter Ostlie, Richard Miller, Kirk Davis
{"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":"53-61"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","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}
George N Guild, Mary J McConnell, Farideh Najafi, Brandon H Naylor, Charles A DeCook, Thomas L Bradbury
{"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":"7-12"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","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}
James L Cook, James P Stannard, Kylee J Rucinski, Clayton W Nuelle, Cory R Crecelius, Cristi R Cook, Richard Ma
{"title":"Initial Outcomes following Fresh Meniscus Allograft Transplantation in the Knee.","authors":"James L Cook, James P Stannard, Kylee J Rucinski, Clayton W Nuelle, Cory R Crecelius, Cristi R Cook, Richard Ma","doi":"10.1055/a-2389-9001","DOIUrl":"10.1055/a-2389-9001","url":null,"abstract":"<p><p>Based on recent evidence-based advances in meniscus allograft transplantation (MAT), fresh (viable) meniscus allografts have potential for mitigating key risk factors associated with MAT failure, and preclinical and clinical data have verified the safety of fresh meniscus allografts as well as possible efficacy advantages compared with fresh-frozen meniscus allografts. The objective of this study was to prospectively assess clinical outcomes for the initial cohort of patients undergoing MAT using fresh meniscus allografts at our center. Patients who were prospectively enrolled in a dedicated registry were included for analyses when they had undergone primary MAT using a fresh meniscus allograft for treatment of medial and/or lateral meniscus deficiency with at least 1-year follow-up data recorded. Forty-five patients with a mean final follow-up of 47.8 months (range = 12-90 months) were analyzed. The mean patient age was 30.7 years (range = 15-60 years), mean body mass index (BMI) was 29.7 kg/m<sup>2</sup> (range = 19-48 kg/m<sup>2</sup>), and 14 patients (31%) were females. In total, 28 medial, 13 lateral, and 4 combined medial and lateral MATs with 23 concurrent ligament reconstructions and 2 concurrent osteotomies were included. No local or systemic adverse events or complications related to MAT were reported for any patient in the study. Treatment success rate for all patients combined was 91.1% with three patients requiring MAT revision and one patient requiring arthroplasty. Treatment failures occurred 8 to 34 months after MAT and all involved the medial meniscus. None of the variables assessed were significantly different between treatment success and treatment failure cohorts. Taken together, the data suggest that the use of fresh (viable) meniscus allografts can be considered a safe and effective option for medial and lateral MAT. When transplanted using double bone plug suspensory fixation with meniscotibial ligament reconstruction, fresh MATs were associated with a 91% success rate, absence of local or systemic adverse events or complications, and statistically significant and clinically meaningful improvements in patient-reported measures of pain and function at a mean of 4 years postoperatively.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":"35-42"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141996693","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}
Journal of Knee SurgeryPub Date : 2025-01-01Epub Date: 2024-10-11DOI: 10.1055/s-0044-1791648
Maxime Guerot, Baptiste Boukebous, Lucas Chanteux, Haroun Bouhali, Marc-Antoine Rousseau, Cédric Maillot
{"title":"Management of Multiligament Knee Injuries Using Anatomic Autograft Reconstructions: A Case Series.","authors":"Maxime Guerot, Baptiste Boukebous, Lucas Chanteux, Haroun Bouhali, Marc-Antoine Rousseau, Cédric Maillot","doi":"10.1055/s-0044-1791648","DOIUrl":"10.1055/s-0044-1791648","url":null,"abstract":"<p><p>While proven effective management of multiligament knee injury (MLKI) using allograft is often reported, it has shown an increased risk for graft failure compared with autograft and raises availability and cost issues. Osseous stock preservation and tunnel convergence avoidance led us to develop a compromise innovative surgical procedure using only ipsilateral autograft for anatomic reconstruction of Schenck III-L or higher MLKI. We report the description and early outcomes of our initial experience. Our strategy consisted of an anatomic single-bundle posterior cruciate ligament reconstruction with quadriceps tendon autograft and a \"Versailles\" reconstruction for the posterolateral corner, which we modified to reconstruct the anterolateral ligament in case of anteromedial rotatory instability, called \"full lateral.\" A second-stage surgery was planned for anterior cruciate ligament reconstruction using a bone-patellar tendon-bone autograft. Outcomes were Lysholm, Tegner, and International Knee Documentation Committee (IKDC) scores for functional status, Short Form 12 (SF-12) for quality of life, and visual analog scale (VAS) for pain. Complications, full weight-bearing, return to work, and sport were also computed. Between March 2019 and August 2020, 10 patients were included. At follow-up, light pain was found in nine patients with a mean VAS of 1.2 ± 2.16 during the day. The mean Lysholm, Tegner, and subjective IKDC scores were good, with 61.2 ± 20.6, 2.8 ± 2.1, and 52.6 ± 20.4, respectively. However, quality of life was altered with poor SF-12 scores. In our first 10 patients with Schenck III-L or higher MLKI, our procedure using only ipsilateral autograft enabled correct daily knee functional activities while preserving osseous stock.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":"43-50"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142407075","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}
Kara McConaghy, Michael Smietana, Ignacio Pasqualini, Pedro J Rullán, Jesse Fleming, Nicolas S Piuzzi
{"title":"Comparing the Rate of Dissolution of Two Commercially Available Synthetic Bone Graft Substitutes.","authors":"Kara McConaghy, Michael Smietana, Ignacio Pasqualini, Pedro J Rullán, Jesse Fleming, Nicolas S Piuzzi","doi":"10.1055/a-2410-2552","DOIUrl":"10.1055/a-2410-2552","url":null,"abstract":"<p><p>This study characterized the dissolution properties of two commercially available bone substitutes: (1) A calcium sulfate (CaS)/brushite/β-tricalcium phosphate (TCP) graft containing 75% CaS and 25% calcium phosphate; and (2) a CaS/hydroxyapatite (HA) bone graft substitute composed of 60% CaS and 40% HA. Graft material was cast into pellets (4.8 mm outer diameter × 3.2 mm). Each pellet was placed into a fritted thimble and weighed before being placed into 200 mL of deionized water. The pellets were removed from the water on days 1, 2, 3, 4, 6, 8, 14, 18, or until no longer visible. The mass and volume of each pellet were calculated at each timepoint to determine the rate of dissolution. Analysis of variance was performed on all data. Statistical significance was defined as <i>p</i> < 0.05. The CaS/HA pellets were completely dissolved after day 8, while the CaS/brushite/β-TCP pellets remained until day 18. The CaS/brushite/β-TCP pellets had significantly more mass and volume at days 1, 2, 3, 4, 6, and 8 timepoints. The CaS/brushite/β-TCP pellets lost 46% less mass and 53% less volume over the first 4 days as compared to CaS/HA pellets. The CaS/brushite/β-TCP pellets had a rough, porous texture, while the CaS/HA pellets had a smooth outer surface. Overall the CaS/brushite/β-TCP pellets dissolved approximately twice as slowly as the CaS/HA pellets in vitro. As these in vitro findings might have in vivo implications, further clinical data are required to further confirm and establish the optimal synthetic bone substitute strategy or antibiotic delivery carrier.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":"62-68"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142141519","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}
Journal of Knee SurgeryPub Date : 2025-01-01Epub Date: 2024-10-29DOI: 10.1055/s-0044-1791985
Abdullah N Ghali, Philip Ghobrial, David A Momtaz, Hari N Krishnakumar, Rishi K Gonuguntla, Yousef Salem, Amir AlSaidi, Katherine C Bartush, David M Heath
{"title":"The Impact of Anterior Cruciate Ligament Tear on Player Performance and Longevity in La Liga League Soccer Players.","authors":"Abdullah N Ghali, Philip Ghobrial, David A Momtaz, Hari N Krishnakumar, Rishi K Gonuguntla, Yousef Salem, Amir AlSaidi, Katherine C Bartush, David M Heath","doi":"10.1055/s-0044-1791985","DOIUrl":"10.1055/s-0044-1791985","url":null,"abstract":"<p><p>Anterior cruciate ligament (ACL) rupture is among the most studied sports injuries. We investigate the impact of ACL reconstruction (ACLR) on performance and longevity in La Liga to elucidate performance parameters impacted after surgery in professional soccer players and variables impacting return-to-play (RTP).Demographic and performance data for La Liga players with ACLR between 1993 and 2020 were collected three seasons before and after injury and compared with two healthy controls. Analysis was conducted between and within ACLR and control groups. Pearson's correlation coefficients and a multiple linear regression model analyzed relationships between demographic variables and RTP.After exclusion, 23 professional soccer players were identified for the ACLR group. One year after index, ACLR had lower goals, shots on-target, assists, pass percentage, tackles, tackle success percentage, blocks, and clearances compared with control (<i>p</i> < 0.05). Two years after index, ACLR had lower assists, pass percentage, and tackle success percentage than control (<i>p</i> < 0.05). Three years after index, ACLR had fewer matches and blocks versus control (<i>p</i> < 0.05). Pearson's correlation showed a positive correlation between experience and RTP (<i>p</i> = 0.001). Multiple linear regression found RTP to increase 32.66 days for each additional year of experience (<i>p</i> < 0.001).With performance metrics showing significant decreases up to 2 years post-ACLR but largely recovering within 3 years of RTP, results support that soccer players undergoing ACLR eventually recover to preinjury levels of play. Players should be counseled on initial declines in performance metrics the first few years after RTP.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":"99-108"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142548463","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":"Alignment Strategies in Total Knee Arthroplasty: The Rise and Role of Enabling Technology.","authors":"Darren B Chen","doi":"10.1055/s-0044-1795074","DOIUrl":"https://doi.org/10.1055/s-0044-1795074","url":null,"abstract":"<p><p>Total knee arthroplasty (TKA) remains the gold standard surgical care for end-stage knee arthritis. Since its inception, TKA has seen many transformative factors with advances in material properties, implant design, and fixation. Improvements in implant longevity has culminated in TKA being recognized as one of modern medicine's most successful surgical procedures. Patient satisfaction, however, remains a significant challenge. Recent studies report that patient satisfaction with current implants and techniques remains at 80 to 90%, suggesting that up to one in five patients remain dissatisfied with their procedure. A balanced knee, defined as equal medial and lateral gaps in knee extension and flexion, is a desired outcome in TKA. This has been shown to be associated with improved clinical outcomes. Given the poor rate of surgeon-defined balance, intraoperative knee balance can be confirmed with objective load data using sensor-embedded smart inserts or by measuring gaps using computer-assisted or robotic platforms. Currently, there is no consensus on the correct alignment or laxity targets for individualized alignment strategies in TKA, and further research in this area is required to answer this. Tremendous advances in our understanding of knee anatomy and kinematics have come to light in the recent past, and these insights have spawned interest in alternative alignment techniques in TKA. More recently, an appreciation of individual knee phenotypes and associated classification systems have provided a platform and the scientific justification behind these contemporary alignment strategies. Paired with enabling technologies, it is becoming an accepted paradigm that surgeons have the ability to select a desired alignment target when undertaking an individualized alignment strategy in TKA and execute the surgery with a high degree of precision. It is hoped that this may reduce the rate of dissatisfaction following TKA and improve clinical outcomes. This review article provides an overview of the concepts of knee phenotypes, current alignment strategies in TKA, and the emerging benefits of enabling technologies.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142792643","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}
Ayooluwa S Ayoola, Michael A Charters, Hamza M Raja, Luke Weseman, Peter L Lewis, Yi Peng, Wayne Trevor North
{"title":"Survivorship of Primary NexGen Knee Replacement: Comparing Cementless Trabecular Metal to Other Designs of Tibial Component.","authors":"Ayooluwa S Ayoola, Michael A Charters, Hamza M Raja, Luke Weseman, Peter L Lewis, Yi Peng, Wayne Trevor North","doi":"10.1055/a-2376-6889","DOIUrl":"10.1055/a-2376-6889","url":null,"abstract":"<p><p>The impact of cementless trabecular metal (TM) implants on implant survivorship are not well delineated. This study compares primary total knee arthroplasty (TKA) revision rates of cemented knee replacements with two cementless knee replacement designs-cementless TM and a non-TM cementless design. Data from a national registry queried TKA procedures performed for osteoarthritis from 1999 to 2020. The risk of revision of Zimmer NexGen TKA using cementless TM, cementless non-TM, and cemented non-TM were compared. Analyses included Kaplan-Meier estimates of survivorship and Cox hazard ratios (HR), stratified by age and gender. Cementless TM components had higher risks of revision compared with cementless non-TM implants (HR = 1.49; <i>p</i> ≤ 0.001). Cementless TM implants showed higher risks of revision compared with cemented non-TM prostheses for the first 2 years (HR = 1.75, <i>p</i> < 0.001). Non-TM prostheses posed equal risk of revision for cementless and cemented fixations (HR = 0.95, <i>p</i> = 0.522). Patients aged 55 to 64 years and 65 to 74 years had a higher risk of revision for cementless TM compared with cementless non-TM (HR = 1.40, <i>p</i> = 0.033 and HR = 1.79, <i>p</i> < 0.001, respectively) and cemented non-TM implants (HR = 1.51, <i>p</i> < 0.001 and HR = 1.54, <i>p</i> < 0.001, respectively). The study shows there is an increased risk of revision with TM cementless implants for patients aged 55 to 74 years. These results do not support the use of TM tibial implants for patients of this age group for primary TKA.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":"949-958"},"PeriodicalIF":1.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141861272","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}
Amber L Randall, Edgar A Wakelin, James Kah, John M Keggi, Jan A Koenig, Jeffrey H DeClaire, Corey E Ponder, Jeffrey M Lawrence, Christopher Plaskos
{"title":"Impact of Joint Laxity on 2-Year KOOS Outcomes of Posterior Stabilized Total Knee Arthroplasty.","authors":"Amber L Randall, Edgar A Wakelin, James Kah, John M Keggi, Jan A Koenig, Jeffrey H DeClaire, Corey E Ponder, Jeffrey M Lawrence, Christopher Plaskos","doi":"10.1055/a-2376-7085","DOIUrl":"10.1055/a-2376-7085","url":null,"abstract":"<p><p>The objective of this study was to determine relationships between intraoperative posterior cruciate ligament (PCL) sacrificing posterior stabilized (PS) total knee arthroplasty (TKA) laxity measurements throughout flexion and patient outcomes at 2 years post-TKA and to define clinically relevant laxity thresholds to optimize patient outcomes.In a single-surgeon study, PCL sacrificing TKA using a robotics-assisted platform with a digital joint tensioning device was performed in 115 knees in 115 patients. Final intraoperative joint laxity was recorded, and 2-year Knee Injury and Osteoarthritis Outcome Scores (KOOSs) were obtained. A Simulated Annealing optimization algorithm was used to identify medial and lateral laxity windows which maximized the 2-year KOOS pain score. Wilcoxon nonparametric tests were used to compare outcomes between groups.Significant associations were found between intraoperative joint laxity and 2-year KOOS pain outcomes throughout flexion. Clinically relevant laxity windows were defined medially and laterally in mid-flexion and flexion for improved outcomes, whereas only a lateral laxity window could be defined in extension. When all laxity windows were satisfied, a 14.5-KOOS point improvement was found (97.2 vs. 77.8, <i>p</i> = 0.0060) compared to knees which did not satisfy any window. Improvements in Activities of Daily Living (Δ8.8, <i>p</i> = 0.0143), Sports (Δ22.5, <i>p</i> = 0.0108), and Quality of Life (Δ18.7, <i>p</i> = 0.0011) KOOS subscores were also found in knees which satisfied all windows versus 0-1 window.Intraoperative joint laxity is associated with postoperative outcomes in a PS knee design, wherein patients balanced within identified laxity targets reported improved outcomes over those that did not. Clinically significant thresholds were defined and were predominately found in mid-flexion and flexion for medial and lateral laxity. When target windows were combined further improved outcomes were identified.</p>","PeriodicalId":48798,"journal":{"name":"Journal of Knee Surgery","volume":" ","pages":"941-948"},"PeriodicalIF":1.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141861269","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}