Journal of Experimental Orthopaedics最新文献

{"title":"Posterior tibial slope and static anterior tibial translation are not associated with increased cyclops syndrome after anterior cruciate ligament reconstruction.","authors":"David Mazy, Nicolas Cance, Lucia Angelelli, Tomas Pineda, Andrea Pintore, David Henri Dejour","doi":"10.1002/jeo2.70664","DOIUrl":"https://doi.org/10.1002/jeo2.70664","url":null,"abstract":"<p><strong>Purpose: </strong>Posterior tibial slope (PTS) and static anterior tibial translation (SATT) are established risk factors for anterior cruciate ligament (ACL) graft rupture and may also be associated with cyclops syndrome. This study aimed to assess whether these anatomical parameters influence the prevalence of cyclops syndrome after ACL reconstruction (ACLR). The hypothesis of the present study was that increased PTS and SATT would facilitate the development of cyclops syndrome.</p><p><strong>Methods: </strong>Patients aged ≥14 years with a minimum follow-up of 6 years who underwent primary ACLR with hamstring autograft between January 2015 and December 2017 were included. Demographic data, PTS, SATT, concomitant lateral extra-articular tenodesis (LET) and reoperation for cyclops syndrome were recorded. Time from index surgery to arthrolysis was documented, with a minimum follow-up of 6 years. Subgroup analysis regarding PTS, SATT and gender was performed. Univariate and multivariate logistic regression analyses were conducted to identify independent risk factors.</p><p><strong>Results: </strong>Of 530 patients included for analysis, 18 (3.4%) developed cyclops syndrome at a mean of 14 ± 9 months postoperatively (range, 6-33 months). Patients with a PTS ≥ 12° had a 4.3% rate of cyclops syndrome compared with 3.2% in those with a PTS < 12° (<i>p</i> = 0.536). Patients with a SATT ≥ 5 mm had a 5.6% rate compared with 2.7% for SATT < 5 mm (<i>p</i> = 0.154). Female patients presented a statistically significant higher prevalence (5.9%) compared with males (1.8%, <i>p</i> = 0.024). Concomitant LET did not demonstrate a protective effect (<i>p</i> = 0.807). Female sex was the only independent predictor of cyclops syndrome (OR, 3.3; 95% CI, 1.2-9.1; <i>p</i> = 0.018).</p><p><strong>Conclusion: </strong>This study found no evidence that increased PTS or SATT predisposes to cyclops syndrome after ACLR with hamstring autograft. These preoperative parameters should not alert clinicians to an increased risk of postoperative cyclops syndrome.</p><p><strong>Level of evidence: </strong>Level III, retrospective case-control study.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 2","pages":"e70664"},"PeriodicalIF":2.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13103869/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147784005","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":"No association detected between posterior tibial slope, static anterior tibial translation and medial meniscus repair failure after anterior cruciate ligament reconstruction.","authors":"David Mazy, Nicolas Cance, Lucia Angelelli, Tomas Pineda, Michael James Dan, David Henri Dejour","doi":"10.1002/jeo2.70715","DOIUrl":"https://doi.org/10.1002/jeo2.70715","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to evaluate the influence of the posterior tibial slope (PTS) and static anterior tibial translation (SATT) on the success of medial meniscus (MM) repair performed concomitantly with anterior cruciate ligament reconstruction (ACLR).</p><p><strong>Methods: </strong>In this retrospective study, all patients who underwent primary ACLR using hamstring autograft combined with isolated MM repair between January 2014 and December 2017, and a minimum follow-up of 6 years, were included. Patients who had undergone meniscectomy or lateral meniscus repair were excluded. Demographic data, PTS, SATT, dynamic anterior tibial translation (DATT), the need for reoperation (at the same location) for MM repair failure (MMRF), and time to failure were recorded. Comparative analyses were performed using thresholds of 12° for PTS and 5 mm for SATT. Univariate logistic regression analyses were used to identify independent risk factors for MMRF.</p><p><strong>Results: </strong>Among the 148 patients included, 14 (9.4%) experienced a MMRF at a mean of 24 ± 16 months post-operatively (range 7-60 months). Twenty-eight percent of patients had undergone concomitant lateral extra-articular tenodesis (LET). There were no significant differences between the MMRF and non-failure groups in terms of age, sex, presence of LET, PTS, SATT or DATT. Patients with PTS ≥ 12° (odds ratio, 2.9; 95% confidence interval, 0.8-11.6; <i>p</i> = 0.11) or SATT ≥ 5 mm did not demonstrate a higher rate of MMRF. No variable from the univariate analysis met the criteria for inclusion in the multivariate analysis. Limited number of MMRF events increase potential risk of type II error.</p><p><strong>Conclusion: </strong>No statistically significant association was detected between PTS, SATT, DATT, age or the presence of LET and MMRF after hamstring ACLR. However, larger studies are needed, particularly in high-slope subgroups. Increased PTS or SATT alone should not discourage MM repair in the setting of ACLR.</p><p><strong>Level of evidence: </strong>Level III, retrospective case-control study.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 2","pages":"e70715"},"PeriodicalIF":2.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13103867/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147783969","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":"Removing cartilage in the \"unworn\" side increases the accuracy in restoring the distal joint line in kinematic alignment total knee arthroplasty.","authors":"Giorgio Cacciola, Daniele Vezza, Francesco Bosco, Francesco Carturan, Alessandro Massè, Luigi Sabatini","doi":"10.1002/jeo2.70618","DOIUrl":"https://doi.org/10.1002/jeo2.70618","url":null,"abstract":"<p><strong>Purpose: </strong>In kinematically aligned total knee arthroplasty (KA-TKA), the restoration of the native joint line is critical to achieving optimal functional outcomes. The conventional assumption of a uniform 2 mm cartilage thickness may lead to errors in distal femoral resections. This study aimed to evaluate whether systematic cartilage removal from the unworn femoral condyle improves the accuracy and consistency of distal joint-line restoration.</p><p><strong>Methods: </strong>A retrospective analysis was conducted on prospectively collected data from 374 patients who underwent primary KA-TKA between March 2023 and March 2025 at a single institution. Patients were divided into two groups: Group A (<i>n</i> = 187), where cartilage on the unworn femoral condyle was preserved, and Group B (<i>n</i> = 187), where cartilage was removed before distal resection. All procedures used the same surgical technique and implant model. The lateral distal femoral angle (LDFA) was measured preoperatively and postoperatively on full-length weight-bearing radiographs. The LDFA restoration error was defined as the difference between postoperative and preoperative LDFA values. Group comparisons were performed using the Wilcoxon-Mann-Whitney <i>U</i> test and Levene's test for equality of variances.</p><p><strong>Results: </strong>Group B (cartilage removed) showed a significantly lower LDFA restoration error (-0.12° ± 0.94°) compared to Group A (-0.35° ± 1.88°) (<i>p</i> < 0.001). Levene's test confirmed a significantly reduced dispersion of LDFA error in Group B (<i>p</i> = 0.027). A greater proportion of Group B patients achieved LDFA restoration within ±0.5° (52.9% vs. 38.5%) and ±1° (85.0% vs. 71.7%) of the target value (<i>p</i> < 0.001 for both).</p><p><strong>Conclusions: </strong>Removing cartilage from the unworn femoral condyle significantly enhances the precision and consistency of distal joint line restoration in KA-TKA. This technical refinement may reduce alignment variability and improve reproducibility by addressing interindividual differences in cartilage thickness, which are often underestimated in standard practice.</p><p><strong>Level of evidence: </strong>Level III, retrospective comparative study.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 2","pages":"e70618"},"PeriodicalIF":2.7,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13105241/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147784040","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":"Collagen Type V alpha 1 chain and alpha-actinin-3 variants predict knee ligament injury risk in professional football players.","authors":"Yoshitomo Saita, Nanako Yamamoto, Eri Miyamoto-Mikami, Takaya Ohtaki, Hidenori Izawa, Yoshifumi Fukushima, Muneaki Ishijima, Noriyuki Fuku","doi":"10.1002/jeo2.70724","DOIUrl":"https://doi.org/10.1002/jeo2.70724","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate whether polymorphisms in collagen Type V alpha 1 chain (COL5A1), actinin alpha 3 (ACTN3) and angiotensin-converting enzyme (ACE) are associated with susceptibility to anterior cruciate ligament (ACL) and medial collateral ligament (MCL) injuries in professional football players.</p><p><strong>Methods: </strong>Between 2017 and 2025, 122 male professional football players were enroled. Genotyping was performed for COL5A1 rs12722, COL5A1 rs10628678 (formerly rs71746744), ACTN3 rs1815739 and ACE rs4341. Players were classified based on the history of ACL/MCL injuries and prospectively monitored injuries. Logistic regression was used to calculate odds ratios and 95% confidence intervals.</p><p><strong>Results: </strong>Forty-three players sustained ACL or MCL injuries (15 before and 28 after team enrolment), including 17 ACL injuries. The COL5A1 rs10628678 dominant model (-/-+AGGG/- vs. AGGG/AGGG) was associated with an increased risk of overall knee ligament injury. The ACTN3 rs1815739 recessive model (XX vs. RR + RX) was associated with overall ligament and ACL injuries. Combined genotype analysis revealed that players with COL5A1 rs10628678 -/- and ACTN3 rs1815739 XX had the highest risk. When a simplified combined risk variable was defined (COL5A1 rs10628678 AGGG/- or -/- plus ACTN3 rs1815739 XX), this group accounted for 18.9% of the cohort and showed a significantly higher prevalence of ligament (70.7% vs. 29.3%) and ACL (30.4% vs. 10.1%) injuries. Logistic regression confirmed an independent threefold increase in risk.</p><p><strong>Conclusion: </strong>COL5A1 and ACTN3 variants may be associated with susceptibility to knee ligament injuries. Notably, this study suggests that both ligament-related (COL5A1) and muscle function-related genetic characteristics (ACTN3) may jointly influence injury risk. A simplified combined risk model identified nearly one-fifth of players as genetically high-risk, with an approximately threefold higher likelihood of ligament injury. These findings suggest that a single genetic test may help identify athletes at elevated risk who could potentially benefit from targeted preventive neuromuscular training strategies.</p><p><strong>Level of evidence: </strong>Level IV.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 2","pages":"e70724"},"PeriodicalIF":2.7,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13093292/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147784002","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":"Use of the VELYS Robotic-Assisted Solution in knee arthroplasty: A scoping review.","authors":"Scott R Morrison, Andrew J Hall, Nick D Clement, Phil J Walmsley, Christopher Gee, Jon V Clarke","doi":"10.1002/jeo2.70726","DOIUrl":"https://doi.org/10.1002/jeo2.70726","url":null,"abstract":"<p><strong>Purpose: </strong>Robotic knee arthroplasty has been associated with improved knee-specific outcomes, but results are relatively immature. The VELYS Robotic-Assisted Solution is an imageless semi-active system used with the ATTUNE knee arthroplasty system. Recently, the UK National Institute for Health and Care Excellence called for a multidomain evaluation of six robotic-surgery platforms in orthopaedics, of which VELYS is one. This review aimed to (i) evaluate current evidence on VELYS in total knee arthroplasty, (ii) assess outcomes, complications, cost and versatility, (iii) appraise study quality and (iv) identify knowledge gaps.</p><p><strong>Methods: </strong>A scoping review using five-stage methodology following Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) guidelines was undertaken. Articles were screened against pre-determined criteria, with data synthesized descriptively and thematically.</p><p><strong>Results: </strong>One hundred twenty-six studies were identified, with 22 included. Evidence level ranged from II to IV. Analysis highlighted improved implant positioning as seen with other robotic systems, as well as a non-inferior safety profile. However, despite studies appearing to highlight favourable early patient-reported outcomes and function as well as greater workflow efficiency, the overall quality of the published work was poor, giving little evidence to robustly support many of the conclusions drawn in these studies. Limitations of these studies included small sample sizes, a lack of information on patient characteristics and patient selection, retrospective design and a lack of long-term follow-up.</p><p><strong>Conclusion: </strong>The available literature regarding the VELYS Robotic-Assisted Solution is limited and of moderate-to-poor quality. Implant positioning was more accurate; however, other results, especially regarding improved patient outcomes, are not currently well-evidenced. Evidence was largely retrospective or early prospective, with no randomized controlled trials or long-term data. High-quality, randomized studies are required to evidence this technology.</p><p><strong>Level of evidence: </strong>N/A.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 2","pages":"e70726"},"PeriodicalIF":2.7,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13093383/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147784046","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 closing wedge distal femoral varus osteotomy alters the stress distribution pattern of the patellofemoral joint: An evaluation using computed tomography osteoabsorptiometry.","authors":"Masanari Hamasaki, Eiji Kondo, Koji Iwasaki, Yuki Suzuki, Masatake Matsuoka, Tomohiro Onodera, Daisuke Momma, Masayuki Inoue, Kazunori Yasuda, Tomonori Yagi, Norimasa Iwasaki","doi":"10.1002/jeo2.70689","DOIUrl":"https://doi.org/10.1002/jeo2.70689","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to (1) assess changes in subchondral bone density distribution across patellofemoral (PF) joint before and after medial closing wedge-distal femoral varus osteotomy (MCW-DFVO) and (2) determine correlation between PF alignment and changes in bone density distribution.</p><p><strong>Methods: </strong>This retrospective study enroled patients who underwent MCW-DFVO for symptomatic isolated lateral compartment osteoarthritis (OA), spontaneous osteonecrosis of the knee and lateral femoral condyle cartilage injury with valgus alignment from 2016 to 2022. Clinical and radiological assessments were conducted preoperatively and at the final follow-up. The final follow-up referred to the last documented visit at which outcome measures were available. The radiological quadriceps angle (rQ angle) was measured using computed tomography (CT). The distribution of subchondral bone density on trochlear and patella was examined using CT osteoabsorptiometry. The lateral ratio was calculated as the proportion of high-density areas (HDAs) in the lateral compartments relative to the total HDAs across compartments of trochlea and patella. The paired Student's <i>t</i> test and Pearson's correlation analysis were used to test for significance (<i>p</i> = 0.05).</p><p><strong>Results: </strong>Seventeen knees (17 patients; mean age, 48 years) were included. Following MCW-DFVO, the mean postoperative Lysholm score significantly improved at the final follow-up (mean, 29.2 months; range, 14-65 months). The mean lateral ratio of the trochlea and patella notably declined from 69% to 50% and 69% to 56%, respectively (<i>p</i> = 0.004 and <i>p</i> = 0.041). Changes in trochlear lateral ratio were significantly correlated with changes in the hip-knee-ankle angle, mechanical axis, rQ angle and lateral shift ratio (<i>p</i> = 0.027, <i>p</i> = 0.031, <i>p</i> = 0.024 and <i>p</i> = 0.008, respectively).</p><p><strong>Conclusion: </strong>MCW-DFVO induced a redistribution of HDA from lateral to medial PF articular surface. Moreover, degree of PF alignment correction post-MCW-DFVO was linked to shifts in HDA distribution. MCW-DFVO alters PF joint stress distribution by reducing lateral compartment loading, supporting its use in valgus knees with PF mal-tracking or overload.</p><p><strong>Level of evidence: </strong>Level IV, case series.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 2","pages":"e70689"},"PeriodicalIF":2.7,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13094811/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147783981","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":"Impact of osteoarthritis aetiology and implant constraint on the risk of secondary patellar resurfacing after total knee arthroplasty: An analysis of German Arthroplasty Registry (EPRD) data.","authors":"Stephanie Kirschbaum, Yinan Wu, Oliver Melsheimer, Arnd Steinbrück, Alexander Grimberg","doi":"10.1002/jeo2.70720","DOIUrl":"https://doi.org/10.1002/jeo2.70720","url":null,"abstract":"<p><strong>Purpose: </strong>The benefit of patella resurfacing (PR) in primary total knee arthroplasty (TKA) remains debated. While outcomes appear similar, unsurfaced patellae show higher revision rates. Existing studies are limited by heterogeneous cohorts. This study assessed the risk of secondary PR in relation to the level of constraint and primary procedure complexity (idiopathic vs. posttraumatic osteoarthritis).</p><p><strong>Methods: </strong>Using registry data, 258,669 primary TKAs without primary PR were analysed. Demographics, implant constraint and subsequent revisions were recorded. The primary endpoint was secondary PR (without additional femoral or tibial implant removal) over a follow-up period of up to 8 years.</p><p><strong>Results: </strong>Cruciate-retaining (CR) designs showed the lowest revision risk (ca. 1%), whereas posterior-stabilised (PS) designs showed the highest (ca. 2.0-2.5%, hazard ratio = 1.8 [95% confidence interval = 1.66-1.99], <i>p</i> < 0.001). The majority of secondary PR occurred within 4 years. No differences were found between idiopathic and posttraumatic groups.</p><p><strong>Conclusions: </strong>Registry data indicate higher revision risk with PS versus CR designs, regardless of index surgery complexity.</p><p><strong>Level of evidence: </strong>Level III.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 2","pages":"e70720"},"PeriodicalIF":2.7,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13084700/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147724148","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-term outcomes and over 80% survivorship rate after all-inside repair of bucket-handle and full-thickness radial tears.","authors":"Lika Dzidzishvili, Luca Ambrosini, Federico Maria Adravanti, Claudio Rossi, Maria Pia Neri, Ashraf Hantouly, Stefano Zaffagnini, Alberto Grassi","doi":"10.1002/jeo2.70721","DOIUrl":"10.1002/jeo2.70721","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate failure rates, survivorship, patient-reported outcome measurements (PROMs), and prognostic factors following all-inside arthroscopic repair of bucket-handle tears (BHT) and full-thickness radial meniscal tears (RT).</p><p><strong>Methods: </strong>A retrospective cohort study included consecutive patients undergoing all-inside repair of BHT or RT by a single surgeon (2019-2025) with a minimum 2-year follow-up. Inclusion required primary repair using all-inside devices. Demographic data, tear morphology, chronicity, and concomitant procedures were recorded. Failure was defined as surgical re-intervention or magnetic resonance imaging-confirmed re-tear. PROMs included subjective International Knee Documentation Committee (IKDC), Tegner Activity Scale, Patient Acceptable Symptom State (PASS), and Visual Analog Scale (VAS) scores. Return to sport (RTS) rates and the achievement of IKDC-PASS threshold were assessed. Kaplan-Meier survival analyses for each lesion type were performed at 1, 2, 3, and 4 years; subgroup comparisons (location, ACL reconstruction, aetiology) were performed using the log-rank test.</p><p><strong>Results: </strong>Fifty-five repairs (34 BHTs, 21 RTs; 72.7% males; mean age 27.0 ± 11.7 years) were analysed. BHTs were medial in 24 cases and lateral in 10; all RTs were lateral. Overall, 52.7% were chronic, 54.6% treated with concomitant ACL reconstruction, and 83.7% were traumatic. Five repairs failed (mean 22.3 ± 11.9 months), yielding cumulative failure rates of 0.0% at 1 year, 6.0% at 2 years, 8.7% at 3 years and 17.8% at 4 years. Failures were more frequent in medial BHTs (35.5%), degenerative tears (<i>p</i> = 0.0194) and isolated repairs (<i>p</i> = 0.0321). Overall satisfaction was 97.9%, with 87.2% patients returning to sport and 48.9% reaching their preinjury level.</p><p><strong>Conclusions: </strong>Meniscal repair of BHTs and RTs achieved 98% patient satisfaction and high return-to-sport rates with a 17% mid-term failure. Medial BHTs and degenerative lesions demonstrated a higher risk of failure, whereas repairs performed concomitantly with ACL reconstruction showed lower failure rates. These findings support early repair and highlight the importance of tear pattern, aetiology, lesion chronicity and concomitant procedures in predicting outcomes.</p><p><strong>Level of evidence: </strong>Level IV, therapeutic case series.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 2","pages":"e70721"},"PeriodicalIF":2.7,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13086614/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147724062","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":"Highly accurate component placement does not improve patient-reported outcomes after total hip arthroplasty: A computerised tomography-based study.","authors":"Raymond Guntae Kim, Lucy Jane Salmon, Gerard Smith, Michael Dudley O'Sullivan","doi":"10.1002/jeo2.70722","DOIUrl":"https://doi.org/10.1002/jeo2.70722","url":null,"abstract":"<p><strong>Purpose: </strong>To compare total hip arthroplasty (THA) outcomes between those with and without highly accurate component placement relative to the preoperative plan on computerised tomography (CT) criteria.</p><p><strong>Methods: </strong>Primary THA patients with preoperative and postoperative CT scans who completed baseline and 1-year patient-reported outcomes (PROMs) were included. Patients were allocated to the 'precise anatomic restoration (PAR)' group if they met all criteria for component position relative to the preoperative plan: within 5 mm of femoral offset and leg length and within 10 degrees of combined anteversion and inclination of the acetabular cup. Those who did not meet these criteria were allocated to the control group. Outcomes were compared between groups for 1-year PROMs, including the Oxford hip score (OHS), hip dysfunction and Osteoarthritis Outcome Score for Joint Replacement Score (HOOS JR) and satisfaction.</p><p><strong>Results: </strong>Of 125 participants, 70 (56%) were allocated to PAR while 55 (44%) to control. There was no significant difference between groups for 12-month OHS (<i>p</i> = 0.438), HOOS JR (<i>p</i> = 0.630), the proportion achieving PASS for OHS (<i>p</i> = 0.495), HOOS JR (<i>p</i> = 0.575) or satisfaction (<i>p</i> = 0.854). There was no significant correlation between component position error on CT and 12-month PROMs.</p><p><strong>Conclusion: </strong>Highly accurate THA component placement does not translate to superior PROMS, compared to those with small errors in component placement at 1 year after THA. The implications for hip arthroplasty practice are substantial: achieving high levels of technical accuracy through advanced technologies may not consistently translate into measurable improvements in patient outcomes.</p><p><strong>Level of evidence: </strong>Level II.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 2","pages":"e70722"},"PeriodicalIF":2.7,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13084697/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147724095","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":"Skeletally immature patients undergoing over-the-top anterior cruciate ligament (ACL) reconstruction using hamstring autograft with preserved tibial insertion and lateral extraarticular tenodesis (LET) exhibit good early graft MRI signal similar to adult patients.","authors":"Yuta Nakanishi, Luca Ambrosini, Emanuele Altovino, Claudio Rossi, Emre Anil Özbek, Stefano Zaffagnini, Alberto Grassi","doi":"10.1002/jeo2.70590","DOIUrl":"https://doi.org/10.1002/jeo2.70590","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate short-term anterior cruciate ligament (ACL) graft maturity in skeletally immature patients undergoing ACL reconstruction (ACLR) with physeal-sparing over-the-top (OTT) technique using hamstring tendon (HT) autograft with preserved tibial insertion, and to compare the results with adult patients operated using an OTT technique with similar features.</p><p><strong>Methods: </strong>Skeletally immature patients who underwent primary ACLR with OTT between February 2022 and January 2025 with post-operative Magnetic Resonance Imaging (MRI) performed between 10 weeks and 6 months were retrospectively reviewed. Graft maturation was evaluated via the Howell grading system and ACL signal/noise quotient (SNQ) on MRI. Additionally, graft continuity, tunnel widening, fluid collection within the graft, and bone oedema of the tibial tunnel wall were assessed. Skeletally immature patients were propensity-matched at a 1:1 ratio to adult patients, and comparisons were performed.</p><p><strong>Results: </strong>A total of 22 skeletally immature patients (average skeletal age 12.9 ± 2.3 years) out of 79 patients were included. MRI assessment of graft maturity was performed at an average of 4.0 ± 1.3 months postoperatively. All patients presented graft continuity, with Grade I or II Howell grade in 86% of cases. For the comparative analysis, a subset of 10 skeletally immature patients (those with a tibial tunnel) was matched with 10 adult patients (90% males, mean age 25.9 ± 10.0 years) who underwent MRI 4.0 ± 1.2 and 18.0 ± 2.1 months after surgery. No significant differences were reported for all individual items, such as the Howell graft score, SNQ, and tunnel features, between skeletally immature and adult patients at the 4-month assessment (<i>p</i> > 0.05).</p><p><strong>Conclusion: </strong>ACLR with OTT technique via HT autograft with preserved tibial insertion may provide satisfactory ligamentization in skeletally immature patients. Graft maturity was comparable to that of the adult population. These data suggest that graft maturation using this specific surgical approach is satisfactory in skeletally immature patients and is comparable to adults.</p><p><strong>Level of evidence: </strong>Level IV, retrospective study.</p>","PeriodicalId":36909,"journal":{"name":"Journal of Experimental Orthopaedics","volume":"13 2","pages":"e70590"},"PeriodicalIF":2.7,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13086626/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147724128","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}