Journal ArticleDOI
Role of the Acetabular Labrum and the Iliofemoral Ligament in Hip Stability: An in vitro Biplane Fluoroscopy Study
Casey A. Myers,Bradley C. Register,Pisit Lertwanich,Leandro Ejnisman,W. Wes Pennington,J. Erik Giphart,Robert F. LaPrade,Marc J. Philippon +7 more
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TLDR
The iliofemoral ligament had a significant role in limiting external rotation and anterior translation of the femur, while the acetabular labrum provided a secondary stabilizing role for these motions.Abstract:
BackgroundRecent biomechanical reports have described the function of the acetabular labrum and iliofemoral ligament in providing hip stability, but the relative stability provided by each structure has not been well described.HypothesisBoth the iliofemoral ligament and acetabular labrum are important for hip stability by limiting external rotation and anterior translation, with increased stability provided by the iliofemoral ligament compared with the acetabular labrum.Study DesignControlled laboratory study.MethodsFifteen fresh-frozen male cadaveric hips were utilized for this study. Each specimen was selectively skeletonized down to the hip capsule. Four tantalum beads were embedded into each femur and pelvis to accurately measure hip translations and rotations using biplane fluoroscopy while either a standardized 5 N·m external or internal rotation torque was applied. The hips were tested in 4 hip flexion angles (10° of extension, neutral, and 10° and 40° of flexion) in the intact state and then by se...read more
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Arthroscopic Capsulotomy, Capsular Repair, and Capsular Plication of the Hip: Relation to Atraumatic Instability
TL;DR: As the capsuloligamentous stabilizers of the hip continue to be studied, and their role defined, arthroscopic hip surgeons should become facile with arthroScopic repair or plication techniques to restore proper capsular integrity and tension when indicated.
Journal ArticleDOI
Arthroscopic Capsular Plication and Labral Preservation in Borderline Hip Dysplasia Two-Year Clinical Outcomes of a Surgical Approach to a Challenging Problem
TL;DR: Patients with borderline dysplasia will demonstrate postoperative improvement, high satisfaction rates, and low reoperation rates after a surgical approach that includes arthroscopic labral repair augmented by capsular plication with inferior shift are demonstrated.
Journal ArticleDOI
Catastrophic Failure of Hip Arthroscopy Due to Iatrogenic Instability: Can Partial Division of the Ligamentum Teres and Iliofemoral Ligament Cause Subluxation?
TL;DR: The importance of the ligamentum teres and small disruptions of the capsule in patients with mild dysplasia is emphasized, and excessive rim trimming, capsulotomy, overzealous labral resection, or inadequate labral repair is emphasized.
Journal ArticleDOI
Routine complete capsular closure during hip arthroscopy.
TL;DR: A safe, efficient, and effective method to accomplish complete capsulotomy and recommend complete capsular closure in conjunction with labral repair and osseous femoral and acetabular treatment to reduce iatrogenic postoperative hip instability.
Journal ArticleDOI
Biomechanical Evaluation of Capsulotomy, Capsulectomy, and Capsular Repair on Hip Rotation
Geoffrey D. Abrams,Geoffrey D. Abrams,Michael Hart,Kaosu Takami,Christopher O. Bayne,Bryan T. Kelly,Alejandro A. Espinoza Orías,Shane J. Nho +7 more
TL;DR: A T-capsulotomy showed significantly increased external rotation versus the intact and interportal capsulotomy states and the repaired T- Capsulotomy restored the rotational profile back to the native state.
References
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ISB recommendation on definitions of joint coordinate system of various joints for the reporting of human joint motion—part I: ankle, hip, and spine
Ge Wu,Sorin Siegler,Paul Allard,Chris Kirtley,Alberto Leardini,Dieter Rosenbaum,Mike Whittle,Darryl D. D'Lima,Luca Cristofolini,Hartmut Witte,Oskar Schmid,Ian A. F. Stokes +11 more
TL;DR: The Standardization and Terminology Committee (STC) of the International Society of Biomechanics proposes definitions of JCS for the ankle, hip, and spine, and suggests that adopting these standards will lead to better communication among researchers and clinicians.
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Outcomes following hip arthroscopy for femoroacetabular impingement with associated chondrolabral dysfunction: MINIMUM TWO-YEAR FOLLOW-UP
TL;DR: Hip arthroscopy for femoroacetabular impingement, accompanied by suitable rehabilitation, gives a good short-term outcome and high patient satisfaction and the predictors of a better outcome were the pre-operative modified HHS, joint space narrowing >or= 2 mm, and repair of labral pathology instead of debridement.
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An in vitro investigation of the acetabular labral seal in hip joint mechanics.
TL;DR: Hydstatic fluid pressurisation within the intra-articular space is greater with the labrum than without, which may enhance joint lubrication, and the trends observed in this experiment support the predictions of previous finite element analyses.
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Treatment of Femoro-Acetabular Impingement: Preliminary Results of Labral Refixation
TL;DR: Patients treated with labral refixation recovered earlier and had superior clinical and radiographic results when compared with patients who had undergone resection of a torn labrum during surgical treatment of femoro-acetabular impingement.
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A biomechanical investigation of the human hip
TL;DR: The inverse dynamics problem associated with the three lower extremity segments is solved for the time variations of the intersegmental force and moment resultants at the hip, knee, and ankle.