Journal of Experimental Orthopaedics最新文献

{"title":"Patient-reported outcomes after anterior cruciate ligament reconstruction with the JewelACL synthetic ligament: Multicenter study of at least 9 years follow-up.","authors":"Klaudiusz Kosowski, Ewa Bręborowicz, Marek Olek, Maciej Wiśniewski","doi":"10.1002/jeo2.70838","DOIUrl":"10.1002/jeo2.70838","url":null,"abstract":"<p><strong>Purpose: </strong>Synthetic grafts for anterior cruciate ligament (ACL) reconstruction aim to address limitations of biological grafts, such as donor-site morbidity and delayed recovery. JewelACL is a synthetic scaffold developed to enhance biological integration and mechanical durability. This multicenter study evaluated long-term patient-reported outcomes, adverse events, re-rupture rates and return-to-sport outcomes following ACL reconstruction using JewelACL, with a minimum follow-up of 9 years.</p><p><strong>Methods: </strong>A retrospective cohort of 58 patients who underwent ACL reconstruction between 2010 and 2014, using either JewelACL alone (<i>n</i> = 44) or JewelACL combined with hamstring autograft (hybrid technique; <i>n</i> = 14), was assessed. Patient-reported outcome measures (PROMs), including the International Knee Documentation Committee (IKDC), Lysholm and Tegner scores, as well as complication and re-rupture rates, were analysed. Long-term follow-up was based on telephone-administered PROMs; no standardised clinical laxity testing or imaging (magnetic resonance imaging or x-ray) was performed.</p><p><strong>Results: </strong>At a mean follow-up of 10.8 ± 0.9 years, the re-rupture rate was (5.2%) 3 cases out of 58. Median Lysholm and IKDC scores were 100 (interquartile range [IQR] 91-100) and 95 (IQR 89-99), respectively, indicating excellent long-term knee function. The mean Tegner score at follow-up was 5.2 ± 1.7, representing a modest decline from the pre-injury level of 6.5, consistent with age-related reductions in activity. No patient-reported infections or hospital admissions related to the operated knee were reported. IKDC scores were significantly higher in the JewelACL-only group than in the hybrid group (<i>p</i> = 0.02), while Lysholm and Tegner scores did not differ significantly.</p><p><strong>Conclusions: </strong>ACL reconstruction using JewelACL was associated with excellent long-term PROMs, low re-rupture rates and high return-to-sport rates. Although these findings are encouraging, interpretation is limited by the retrospective design, substantial loss to follow-up and the absence of imaging or objective clinical assessments. There was no statistically significant difference in return-to-sport rates between the JewelACL group (85%) and the hybrid group (86%) (<i>p</i> = 1.00).</p><p><strong>Level of evidence: </strong>Level IV.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 3","pages":"e70838"},"PeriodicalIF":3.2,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13455538/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148707699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Internal rotation strength recovers fully after the open Latarjet via a subscapularis-split: A systematic review and meta-analysis.","authors":"Willem Geuskens, Arjun Mehra, Eoghan Hurley, Hannan Mullett","doi":"10.1002/jeo2.70882","DOIUrl":"10.1002/jeo2.70882","url":null,"abstract":"<p><strong>Purpose: </strong>To systematically evaluate postoperative internal rotation (IR) and external rotation (ER) strength recovery following the open Latarjet (OL) procedure performed through a subscapularis-split approach using isokinetic dynamometry.</p><p><strong>Methods: </strong>A systematic search of PubMed, Embase, and the Cochrane Library following PRISMA guidelines was performed to identify clinical studies reporting postoperative shoulder rotational strength after OL. Extracted outcomes included IR and ER peak torque and ER/IR ratios. A random-effects meta-analysis was conducted for studies reporting peak torque at 60°/s.</p><p><strong>Results: </strong>Eleven studies encompassing 274 patients met inclusion criteria. Across studies, rotational strength recovery followed a consistent temporal pattern. Early (<6 months) deficits were substantial for IR (18%-42%) and ER (8%-30%). Between 6 and 12 months, strength improved but did not fully normalise. At ≥18 months, IR strength typically recovered, whereas small but statistically significant ER deficits persisted (4%-15%). Meta-analysis demonstrated pooled deficits of 17.0% for ER (95% confidence interval [CI], 12.1-21.9) and 15.1% for IR (95% CI, 9.0-21.2), with significantly smaller deficits at late compared with early follow-up for both IR and ER strength. ER/IR ratios showed no overall asymmetry; however, subgroup analysis revealed a shift from early IR-dominant weakness to late ER-dominant weakness.</p><p><strong>Conclusions: </strong>Shoulder rotational strength recovery after the OL procedure through a subscapularis-split approach follows a predictable temporal pattern, with early internal rotation deficits resolving by 6-12 months and small but persistent external rotation deficits at long-term follow-up. These findings indicate that the split of the subscapularis muscle does not compromise IR strength at long-term follow-up, supporting its safety for young and active patients.</p><p><strong>Level of evidence: </strong>Level III.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 3","pages":"e70882"},"PeriodicalIF":3.2,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13446457/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148686032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The association between GPS-derived external workload metrics and soleus muscle injuries in professional football (soccer) players","authors":"Luca Benedetti,&nbsp;Matthew Buckthorpe,&nbsp;Stefano Di Paolo,&nbsp;Francesco Della Villa,&nbsp;Gianni Nanni","doi":"10.1002/jeo2.70755","DOIUrl":"10.1002/jeo2.70755","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Purpose&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;To investigate the association between external GPS workload metrics and soleus muscle injuries (SMI) in elite professional football.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Methods&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;A retrospective cohort study was conducted across seven consecutive seasons (2017/2018–2023/2024) in a single Italian Serie A first-team squad. One hundred and sixty player-season observations were included (25.4 ± 3.2 years; goalkeepers excluded), with 4704 match-hours and 31,686 training-hours recorded. SMIs were defined as time-loss soleus muscle complaints (excluding contact injuries) diagnosed by the club medical staff in accordance with FIFA consensus definitions and classified as structural or non-structural. External loads were quantified using 50 Hz GPS (Stats Perform) and included total distance, high-intensity distance (≥16 km·h&lt;sup&gt;−1&lt;/sup&gt;), sprint distance (≥25 km·h&lt;sup&gt;−1&lt;/sup&gt;), and acceleration/deceleration distances (≥±2.0 m·s&lt;sup&gt;−2&lt;/sup&gt;). For injured players, workloads were averaged across the 7- and 28-day window preceding injury (excluding injury day) and compared to control periods of equal duration. Between-player comparisons contrasted injured players' injury periods with control periods in non-injured players.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Results&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Twenty-nine SMIs (52% were nonstructural) occurred in 17 players. Injured players were older than noninjured players (29.2 ± 3.9 vs. 25.0 ± 3.2 years; &lt;i&gt;p&lt;/i&gt; = 0.041). Most injuries occurred in training (83%); incidence was 0.76/1000 training-hours and 1.06/1000 match-hours; injury burden was 10.86 days/1000 hours. No within-player differences were observed between injury and control weeks for any workload metric (&lt;i&gt;p&lt;/i&gt; &gt; 0.05). Over 28 days, injured players demonstrated lower sprint distance versus their control month (−37%; &lt;i&gt;p&lt;/i&gt; = 0.014; &lt;i&gt;d&lt;/i&gt; = −0.71). For between-player analyses, deceleration distance was higher in the 7-day injury period versus noninjured controls (+17%; &lt;i&gt;p&lt;/i&gt; = 0.041; &lt;i&gt;d&lt;/i&gt; = 0.44), with no 28-day differences.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Conclusion&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;SMIs imposed a substantial burden in elite football and were not preceded by acute workload spikes relative to players' own control periods. Findings suggest SMIs may occur within a context of sustained high training volumes, with modest elevations in short-term deceleration exposure and reduced longer-term sprint distance observed prior to injury.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Level of Evid","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 3","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13446281/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148685949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-dimensional computed tomography-based comparison reveals divergent patellar and tibial tubercle behaviour between lateral closed-wedge and medial open-wedge high tibial osteotomy.","authors":"Yuta Tachibana, Kunihiko Hiramatsu, Kazutaka Kinugasa, Yuzo Yamada, Tomoya Nishikawa, Ayaka Tanaka, Norimasa Nakamura, Tomoki Ohori, Hiroyuki Tanaka, Seiji Okada, Yoshinari Tanaka","doi":"10.1002/jeo2.70884","DOIUrl":"10.1002/jeo2.70884","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to compare three-dimensional patellar and tibial positional changes after medial open-wedge high tibial osteotomy (MOWHTO) and lateral closed-wedge high tibial osteotomy (LCWHTO) using computed tomography.</p><p><strong>Methods: </strong>This retrospective comparative cohort study included 18 patients who underwent high tibial osteotomy for medial knee osteoarthritis (9 MOWHTO, 9 LCWHTO). LCWHTO was selected for patients with patellofemoral joint degeneration, patellofemoral cartilage injury, anterior knee pain or correction angle ≥10°; MOWHTO was selected for the remaining patients. Full-length lower-limb computed tomography scans were obtained preoperatively and at 1 year postoperatively. Displacement and rotation of the patella and distal tibial fragment were quantified in the anterior-posterior, medial-lateral and proximal-distal directions and in the internal-external, varus-valgus and flexion-extension rotations and compared between groups.</p><p><strong>Results: </strong>In the MOWHTO group, the patella shifted distally (1.2 ± 1.9 mm) with internal (3.0° ± 1.9°) and valgus (1.9° ± 1.5°) rotation, whereas in the LCWHTO group it shifted proximally (1.6 ± 1.9 mm) with minimal rotation (proximal-distal displacement, <i>p</i> = 0.017; internal-external rotation, <i>p</i> < 0.001). The distal tibial fragment moved distally (3.5 ± 1.5 mm) with valgus rotation (8.1° ± 2.2°) in the MOWHTO group, but anteriorly (1.3 ± 0.7 mm), medially (6.7 ± 2.3 mm) and proximally (5.1 ± 2.2 mm) with internal rotation (4.5° ± 3.3°) in the LCWHTO group (all translations, <i>p</i> < 0.001; internal-external and varus-valgus rotation, <i>p</i> < 0.01). Patellar distalization and internal rotation correlated with tibial fragment distalization only in the MOWHTO group.</p><p><strong>Conclusion: </strong>MOWHTO and LCWHTO produced distinctly different three-dimensional positional changes of the patella and distal tibial fragment. These positional findings provide a mechanistic basis for individualised surgical decision-making, but their direct impact on PF cartilage status and long-term outcomes requires confirmation in future studies.</p><p><strong>Level of evidence: </strong>Level III, retrospective comparative cohort study.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 3","pages":"e70884"},"PeriodicalIF":3.2,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13446280/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148685965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of accelerated rehabilitation after ACL reconstruction on clinical and functional outcomes: A systematic review and meta-analysis evaluating clinical meaningfulness.","authors":"Mostafa Jalili Bafrouei, Hooman Minoonejad, Rahman Sheikhhoseini, Seyed Hamed Mousavi","doi":"10.1002/jeo2.70878","DOIUrl":"10.1002/jeo2.70878","url":null,"abstract":"<p><strong>Purpose: </strong>Pain, joint laxity, deficits in functional performance and proprioception are common after anterior cruciate ligament reconstruction (ACLR). The role of accelerated rehabilitation (AR) in addressing these outcomes remains uncertain. This systematic review and meta-analysis aimed to evaluate the effects of AR on laxity, functional performance, proprioception and pain in individuals post-ACLR.</p><p><strong>Method: </strong>Four databases (PubMed, Web of Science, Scopus, Embase) were searched until March 2026. Eligible interventional studies comparing AR with standard exercise in individuals post-ACLR were included. Data extraction followed Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 guidelines. Risk of bias was assessed using the PEDro and Newcastle-Ottawa scales. Knee pain and laxity were defined as the primary outcome, with functional performance and proprioception evaluated as secondary outcomes. Random-effects models calculated mean differences (MDs) or standardized mean differences (SMDs) with 95% confidence intervals (CIs).</p><p><strong>Results: </strong>Ten studies (<i>n</i> = 2180 participants) were included. AR resulted in statistically significant improvements in knee laxity (MD: -0.50; 95% CI: -0.65 to -0.36; <i>p</i> < 0.001), proprioception (SMD: 0.20; 95% CI: 0.10-0.30; <i>p</i> < 0.001) and performance outcomes, such as single-leg hop (SMD: 0.85; 95% CI: 0.43-1.27; <i>p</i> < 0.001), International Knee Documentation Committee (MD: 2.39; 95% CI: 0.74-4.03; <i>p</i> = 0.004) and Lysholm score (MD: 1.54; 95% CI: 0.01-3.07; <i>p</i> = 0.04). However, these changes did not reach established thresholds for clinical meaningfulness, and the knee pain outcome (SMD: -0.14, 95% CI: -0.54 to 0.24, <i>p</i> = 0.45) showed no significant changes.</p><p><strong>Conclusion: </strong>AR was associated with statistically detectable changes in knee laxity, functional outcomes and knee proprioception; however, these effects had limited clinical relevance and did not extend to pain reduction. Therefore, the clinical value of AR in optimizing post-ACLR recovery remains uncertain.</p><p><strong>Level of evidence: </strong>Level I.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 3","pages":"e70878"},"PeriodicalIF":3.2,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13446283/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148686004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Postoperative stiffness requiring fibroarthrolysis does not impair long-term outcomes after multiligament knee reconstruction.","authors":"Tomas Pineda, Rodrigo Olivieri, Juan Uribe, Martin Guzman, Gonzalo Idiaquez, Cristobal Diaz, Thomas Neri","doi":"10.1002/jeo2.70883","DOIUrl":"10.1002/jeo2.70883","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate whether patients requiring surgical reintervention for postoperative stiffness following multiligament knee reconstruction achieve comparable functional outcomes to those who do not require additional surgery.</p><p><strong>Methods: </strong>A retrospective cohort study was conducted including patients who underwent surgical reconstruction for multiligament knee injuries between January 2015 and February 2023 at a single level-1 trauma centre, with a minimum follow-up of 24 months. Patients who developed postoperative flexion stiffness requiring arthroscopic fibroarthrolysis combined with manipulation under anaesthesia were identified and compared with those who did not require reintervention. The primary outcomes were the Lysholm score and Knee injury and Osteoarthritis Outcome Score (KOOS4) score at final follow-up.</p><p><strong>Results: </strong>A total of 95 patients were included in the final analysis, of whom 16 (16.8%) required surgical reintervention for postoperative stiffness. The mean age was 38.4 ± 13.5 years and the mean follow-up was 73.2 ± 25.1 months. The median time from index surgery to fibroarthrolysis was 5.0 months (interquartile range, 4.0-8.3). At final follow-up, no statistically significant differences were observed between groups in KOOS4 score (57.9 ± 2.8 vs. 62.9 ± 5.4; <i>p</i> = 0.640) or Lysholm score (64.1 ± 2.7 vs. 66.6 ± 6.0; <i>p</i> = 0.831), with minimal effect sizes (<i>r</i> = 0.05 and <i>r</i> = 0.02, respectively).</p><p><strong>Conclusion: </strong>Patients who required surgical reintervention for postoperative stiffness after multiligament knee reconstruction achieved functional outcomes comparable to those who did not require additional surgery. Arthroscopic fibroarthrolysis combined with manipulation under anaesthesia appears to be a safe and effective treatment option in this setting, supporting its consideration when conservative management has been exhausted.</p><p><strong>Level of evidence: </strong>Level III, retrospective cohort study.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 3","pages":"e70883"},"PeriodicalIF":3.2,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13446277/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148685999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Growing with our authors: Welcoming a new Deputy Editor and three new Associate Editors to the Journal of Experimental Orthopaedics","authors":"Stefano Zaffagnini","doi":"10.1002/jeo2.70879","DOIUrl":"10.1002/jeo2.70879","url":null,"abstract":"&lt;p&gt;Every manuscript that reaches the &lt;i&gt;Journal of Experimental Orthopaedics&lt;/i&gt; (&lt;i&gt;JEO&lt;/i&gt;) begins its life in the hands of an editor. Long before a paper is cited, discussed at a congress or translated into a change in clinical practice, someone has read it carefully, asked whether the question was worth asking, whether the methods could answer it, and whether the conclusions were honest. That quiet, largely invisible work is the real infrastructure of a scientific journal, and it is the reason why the composition of an editorial board is never a purely administrative matter.&lt;/p&gt;&lt;p&gt;&lt;i&gt;JEO&lt;/i&gt; has grown considerably over the past few years. As the official experimental and translational journal of the European Society of Sports Traumatology, Knee Surgery and Arthroscopy (ESSKA), and as a fully open-access publication, we have seen a steady increase in submissions, an expanding geographical footprint, and an increasingly diverse portfolio of study designs from bench-side biomechanics and animal models to registry analyses, systematic reviews with robust methodology, and early clinical translation. Growth of this kind is welcome, but it is also demanding. It requires editors who combine scientific rigour with speed, methodological literacy with clinical judgement, and perhaps most importantly, a genuine willingness to invest time in other people's work.&lt;/p&gt;&lt;p&gt;It is therefore with great pleasure that I announce the promotion of Luca Macchiarola to Deputy Editor, and the appointment of George Mihai Avram, Lika Dzidzishvili and Theodorakys Marín Fermín as Associate Editors of &lt;i&gt;JEO&lt;/i&gt;. All four have already served the journal as reviewers, as members of the Editorial Board, and in several cases as award-winning contributors to its scientific content. Their promotion is not the beginning of their relationship with &lt;i&gt;JEO&lt;/i&gt;; it is the formalization of a commitment they have already demonstrated.&lt;/p&gt;&lt;p&gt;&lt;/p&gt;&lt;p&gt;&lt;b&gt;Luca Macchiarola—Deputy Editor&lt;/b&gt;&lt;/p&gt;&lt;p&gt;Luca Macchiarola brings to the role of Deputy Editor an unusual combination of clinical, scientific and editorial maturity. Trained in Orthopaedics and Traumatology at the Istituto Ortopedico Rizzoli in Bologna and now an Attending Physician at Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Casa Sollievo della Sofferenza in San Giovanni Rotondo, he completed a PhD in Translational Medicine at the University of Foggia and obtained the Italian National Scientific Qualification as Associate Professor. His international training, including a clinical research fellowship at the Centre Hospitalier de Luxembourg and a surgical fellowship in the Sports Surgery Department of Aspetar, Doha, has given him a first-hand understanding of how research questions are framed differently across systems and cultures.&lt;/p&gt;&lt;p&gt;Scientifically, his contributions span anterior cruciate ligament reconstruction and revision surgery, extra-articular lateral procedures, meniscal allograft transplantation and collagen ","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 3","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13446279/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148685956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Good mid- to long-term survivorship and low rates of aseptic loosening of a cementless primary press-fit acetabular cup for contained defects in revision total hip arthroplasty","authors":"Kevin-Arno Koch,&nbsp;Benjamin Zimmer,&nbsp;Raphael Trefzer,&nbsp;Mustafa Hariri,&nbsp;Tilman Walker,&nbsp;Christian Merle,&nbsp;Johannes Weishorn,&nbsp;David Spranz","doi":"10.1002/jeo2.70871","DOIUrl":"10.1002/jeo2.70871","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Purpose</h3>\u0000 \u0000 <p>Acetabular revision total hip arthroplasty (rTHA) remains challenging, and evidence on the use of primary press-fit cups in the revision setting for contained acetabular defects is limited. This study evaluated mid- to long-term implant survivorship, reoperation rates and clinical and radiographic outcomes of a cementless primary press-fit acetabular cup used for acetabular revision.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>This retrospective single-centre study included 107 hips in 106 patients undergoing acetabular rTHA using a cementless primary press-fit cup. Implant survivorship was assessed using cumulative incidence functions for acetabular re-revision for any reason, re-revision for aseptic loosening and reoperation for any reason, with death treated as a competing event. Fine and Gray subdistribution hazard models were used to evaluate potential risk factors. Patient-reported outcome measures included the Harris Hip Score (HHS) and the University of California Los Angeles (UCLA) activity score. Radiographic evaluation was performed using standardised classifications.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Cumulative incidence of acetabular re-revision for any reason was 5.9% at 5 years and 9.8% at 10 years. Re-revision for aseptic loosening occurred in two hips (1.9%), corresponding to survivorship of 99.0% at 5 years and 95.0% at 10 years. The cumulative incidence of reoperation for any reason was 21.7% at 10 years. Previous revision surgery was the only factor associated with an increased risk of subsequent failure. Mean HHS increased from 47 to 76, and the median UCLA activity score from 4 to 6. No radiographic acetabular loosening was observed among patients available for radiographic follow-up.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>In selected acetabular revision cases with contained defects, cementless primary press-fit acetabular cups demonstrated favourable mid- to long-term implant survivorship. Postoperative functional outcomes were comparable to those reported in the existing revision THA literature. Aseptic loosening accounted for only a minority of failures, suggesting durable biological fixation in this revision setting.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Level of Evidence</h3>\u0000 \u0000 <p>Level III, retrospective cohort study.</p>\u0000 </section>\u0000 </div>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 3","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13431681/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148670731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Medial femoral condyle bone mineral density is associated with subchondral insufficiency fractures in female patients with medial meniscus posterior root tears.","authors":"Koki Kawada, Kazuhisa Sugiu, Takaaki Hiranaka, Yuta Morinobu, Yuki Okazaki, Takayuki Furumatsu","doi":"10.1002/jeo2.70877","DOIUrl":"10.1002/jeo2.70877","url":null,"abstract":"<p><strong>Purpose: </strong>In this study, we aimed to evaluate the correlation between bone mineral density (BMD) of the medial femoral condyle (MFC) in patients with medial meniscus posterior root tears (MMPRT) and BMD at commonly evaluated sites, including the femur and lumbar spine. We also examined the association between MFC BMD and subchondral insufficiency fractures of the knee (SIFK).</p><p><strong>Methods: </strong>This retrospective cross-sectional study included patients diagnosed with MMPRT based on magnetic resonance imaging findings at our hospital between November 2025 and March 2026. Lower limb alignment, bone morphology, medial meniscus extrusion (MME) and SIFK grade were evaluated. BMD was measured at the proximal femur, lumbar spine and MFC using dual-energy X-ray absorptiometry. Spearman's rank correlation coefficient was used to evaluate the correlation between the MFC BMD and other BMD measurements. Furthermore, linear regression analysis was conducted to identify factors associated with MFC BMD.</p><p><strong>Results: </strong>A total of 47 patients were included in the final analysis. The mean age was 66.7 ± 8.2 years, and the mean body mass index (BMI) was 24.1 ± 3.9 kg/m². The Kellgren-Lawrence grade distribution (0/1/2/3/4) was 0/29/18/0/0. The mean MME was 3.5 ± 1.1 mm, and the SIFK grade distribution (0/1/2/3/4) was 37/6/4/0/0. MFC BMD showed a significant positive correlation with BMD at all other measured regions (<i>p</i> < 0.001). Multivariate linear regression analysis showed that age (<i>β</i> = -0.009, <i>p</i> < 0.001), BMI (<i>β</i> = 0.009, <i>p</i> = 0.045) and the presence of SIFK in MFC (<i>β</i> = -0.129, <i>p</i> = 0.003) were each independently associated with MFC BMD.</p><p><strong>Conclusions: </strong>MFC BMD was significantly correlated with BMD at commonly assessed regions of the proximal femur and lumbar spine in patients with early-stage osteoarthritis. Additionally, the lower MFC BMD was associated with the presence of SIFK in female patients with MMPRT.</p><p><strong>Level of evidence: </strong>Level IV.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 3","pages":"e70877"},"PeriodicalIF":3.2,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13431680/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148670763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Increased medial anterior tibial translation and reduced tibiofemoral rotation are observed during weight bearing in anterior cruciate ligament-deficient knees: A paired within-subject imaging analysis","authors":"Riccardo D'Ambrosi,&nbsp;Stefano Fusco,&nbsp;Filippo Rinciari,&nbsp;Pietro Marchetti,&nbsp;Domenico Albano,&nbsp;Salvatore Gitto,&nbsp;Luca Maria Sconfienza","doi":"10.1002/jeo2.70876","DOIUrl":"10.1002/jeo2.70876","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Purpose</h3>\u0000 \u0000 <p>To evaluate the effect of weight-bearing computed tomography (WBCT) on knee kinematics in anterior cruciate ligament (ACL)-deficient knees using a within-subject comparison between WBCT and non–weight-bearing conditions (NWBCT).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>This was a prospective within-subject observational imaging study. Patients with chronic ACL deficiency underwent both WBCT and NWBCT cone-beam computed tomography scans of the same knee. Femorotibial rotation (FTR), medial and lateral anterior tibial translation (ATT), and trochlear groove–patellar tendon angle (FTR 2-PTTG) were measured using standardised multiplanar reconstructions. Interobserver reliability was assessed using intraclass correlation coefficients (ICC), while paired <i>t</i>-tests were used to compare measurements between WBCT and NWBCT conditions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>A total of 16 patients (mean age 35.6 ± 10.2 years) were included. WBCT conditions resulted in a significant reduction in FTR compared to NWBCT (3.83 ± 3.30 vs. 8.50 ± 5.10 degrees; <i>p</i> = 0.011) and a significant increase in medial ATT (5.52 ± 3.30 vs. 2.83 ± 3.68 mm; <i>p</i> = 0.021). No significant differences were observed for lateral ATT or FTR 2-PTTG. Interobserver reliability was good to excellent for most measurements (ICC range 0.87–0.98), whereas FTR 2-PTTG demonstrated moderate interobserver reliability (ICC range 0.59–0.71). Correlation analysis revealed a strong positive association between FTR and lateral ATT under NWBCT conditions (<i>r</i> = 0.85, <i>p</i> &lt; 0.001).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>WBCT significantly alters knee kinematics in ACL-deficient knees, resulting in increased medial ATT and reduced FTR compared with NWBCT conditions. These findings suggest that conventional imaging may not fully reflect knee kinematics under physiological loading conditions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Level of Evidence</h3>\u0000 \u0000 <p>Level II, prospective within-subject observational imaging study.</p>\u0000 </section>\u0000 </div>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 3","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13431683/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148670766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}