High Interspecimen Variability in Engagement of the Anterolateral Ligament: An In Vitro Cadaveric Study.

High Interspecimen Variability in Engagement of the Anterolateral Ligament: An In Vitro Cadaveric Study. Clin Orthop Relat Res. 2017 May 05;: Authors: Kent RN, Boorman-Padgett JF, Thein R, van der List JP, Nawabi DH, Wickiewicz TL, Imhauser CW, Pearle AD Abstract BACKGROUND: Anterolateral ligament (ALL) reconstruction as an adjunct to anterior cruciate ligament (ACL) reconstruction remains a subject of clinical debate. This uncertainty may be driven in part by a lack of knowledge regarding where, within the range of knee motion, the ALL begins to carry force (engages). QUESTIONS/PURPOSES: (1) Does the ALL engage in the ACL-intact knee; and (2) where within the range of anterior tibial translation occurring in the ACL-sectioned knee does the ALL engage? METHODS: A robotic manipulator was used to measure anterior tibial translation, ACL forces, and ALL forces in 10 fresh-frozen cadaveric knees (10 donors; mean age, 41 ± 16 years; range, 20-64 years; eight male) in response to applied multiplanar torques. The engagement point of the ALL was defined as the anterior tibial translation at which the ALL began to carry at least 15% of the force carried by the native ACL; a threshold of 15% minimized the sensitivity of the engagement point of the ALL. This engagement point was compared with the maximum anterior tibial translation permitted in the ACL-intact condition using a paired Wilcoxon signed-rank test (p
Source: Clinical Orthopaedics and Related Research - Category: Orthopaedics Authors: Tags: Clin Orthop Relat Res Source Type: research

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This study implemented second-order autoregressive [AR(2)] modeling and its stationarity triangle to both quantitatively and visually delineate differences in dynamic stability from peak vGRF data in controls and post-anterior cruciate ligament reconstruction (ACLR) individuals during running. It was hypothesized that post-ACLR individuals would exhibit less dynamic stability than the controls, and that they would reside in a different location on the stationarity triangle, thus denoting differences in stability. The results presented supported the hypothesis that post-ACLR individuals exhibited significantly less dynamic ...
Source: Journal of Applied Biomechanics - Category: Sports Medicine Tags: J Appl Biomech Source Type: research
This study demonstrated the ability of SPM to assess interlimb differences in lower-extremity movement during 2 example tasks: running and landing. Three-dimensional motion analysis was used to determine sagittal and frontal plane lower-extremity joint angles in (1) young and older individuals during running and (2) patients with anterior cruciate ligament reconstruction and uninjured control athletes during landing. Interlimb differences within each group were compared using SPM and paired t tests on peak discrete angles. No differences between limbs were found between young and older runners using SPM. Peak ank...
Source: Journal of Applied Biomechanics - Category: Sports Medicine Tags: J Appl Biomech Source Type: research
Authors: Hoch JM, Houston MN, Baez SE, Hoch MC Abstract CONTEXT: Many athletes return to sport after anterior cruciate ligament reconstruction (ACLR) with lingering physical or mental health impairments. Examining health-related quality of life (HRQL) and fear-avoidance beliefs across the spectrum of noninjured athletes and athletes with a history of ACLR may provide further insight into targeted therapies warranted for this population. OBJECTIVE: The purpose of this study was to examine differences in fear-avoidance beliefs and HRQL in college athletes with a history of ACLR not participating in sport (ACLR-NP...
Source: Journal of Sport Rehabilitation - Category: Sports Medicine Tags: J Sport Rehabil Source Type: research
CONCLUSIONS: PCS scores fluctuated in response to injury and ACLR. Preoperative PCS scores were not related with 6M outcomes; however, 6M PCS scores correlated with pain and function at 6M. High pain catastrophizing appears to be a natural response immediately following acute ACL injury and ACLR, but may not be indicative of a poor postoperative result. PCS scores 6-months following ACLR may provide useful information regarding self-reported pain and function. PMID: 31628272 [PubMed - as supplied by publisher]
Source: Journal of Sport Rehabilitation - Category: Sports Medicine Tags: J Sport Rehabil Source Type: research
ConclusionDespite the recovery of patients after ACL reconstruction during long-term follow-up in athletes, return to sport activity similar to pre-injury in female, older peoples, overweight patients and athletes with chondral lesion were lower. However, these conditions do not apply to the meniscus rupture.
Source: Journal of Clinical Orthopaedics and Trauma - Category: Orthopaedics Source Type: research
ConclusionFemoral ACL tunnel placement was significantly influenced by the morphological variations of the Blumensaat ’s line. As detecting morphological variation in arthroscopic surgery is difficult, surgeons should confirm such variations pre-operatively using radiograph or CT so as to avoid making extremely shallow and low tunnels in hill type knees.Level of evidenceCase-controlled study, III.
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
ConclusionsMedial-sided bone bruising; especially present on the posterior tibial plateau may result from a higher injury force during the injury to the ACL. The identification of medial bone bruising on pre-operative MRI imaging following an acute ACL rupture should raise the suspicion of an associated postero-medial meniscal tear.Level of evidenceIII.
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
PMID: 31628097 [PubMed - as supplied by publisher]
Source: British Journal of Sports Medicine - Category: Sports Medicine Authors: Tags: Br J Sports Med Source Type: research
Conditions:   ACL Injury;   Meniscus Lesion;   Sport Injury Intervention:   Other: Clinical, self-reported psychological and biomechanical assessments Sponsors:   University of Bari;   Istituto di Fisiologia Clinica CNR Enrolling by invitation
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
ConclusionThe degree of pre-operative ATT in an ACL-deficient knee was not correlated with return to sport or satisfaction after ACL reconstruction. In this study cohort, only failed-ACL reconstruction patients undergoing revision ACL reconstruction were significantly less likely to return to their main sport. They were also less likely to return to sport at their pre-operative level, if they did return to sport.
Source: HSS Journal - Category: Orthopaedics Source Type: research
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