A better understanding of the three-dimensional mechanics pelvis, at patient-specific level, may lead to improved treatment modalities. Although finite element (FE) models pelvis have been developed, validation by direct comparison with subject-specific strains has not performed, and previous used simplifying assumptions regarding geometry material properties. The objectives this study were develop validate a realistic FE model using estimates bone geometry, location-dependent cortical...

The prevalence of femoroacetabular impingement may be greater in athletes than the general population because increased loading hip during sports. This study evaluated radiographs collegiate football players order to quantify asymptomatic athletes.Sixty-seven male (age, 21 ± 1.9 years) participated this prospective study. Both hips (n = 134) were independently by two orthopaedic surgeons for radiographic signs impingement. alpha angle and femoral head-neck offset measured on frog-leg lateral...

Methods to predict contact stresses in the hip can provide an improved understanding of load distribution normal and pathologic joint. The objectives this study were develop validate a three-dimensional finite element (FE) model for predicting cartilage human using subject-specific geometry from computed tomography image data, assess sensitivity predictions boundary conditions, geometry, material properties. Loads based on vivo data applied cadaveric joint simulate walking, descending...

Background: Femoro-acetabular impingement has been associated with acetabular labral and/or articular cartilage damage that may ultimately result in osteoarthritis of the hip. Surgical treatment femoro-acetabular is directed at restoring a more normal femoral head-neck offset to alleviate abutment against rim and treating damage. Methods: Thirty hips (in twenty-nine patients) underwent débridement through greater trochanteric flip osteotomy anterior dislocation head. There were sixteen male...

Background: Delamination of acetabular articular cartilage is a common abnormality in hips with femoroacetabular impingement. The purpose the present study was to identify clinical and radiographic factors predisposing delamination assess diagnostic accuracy magnetic resonance arthrography for detection these lesions. Methods: Following retrospective review records, we determined that had been twenty-eight sixty-four undergone surgical dislocation procedure treatment Multivariable logistic...

Most reports on the results of Bernese periacetabular osteotomy for treatment developmental dysplasia hip have been by originators procedure. In 1997, we began to use this without direct training from procedure.Seventy-three patients (eighty-three hips) underwent a between 1997 and 2003 were followed prospectively with Harris score assess clinical anteroposterior pelvic false-profile lateral plain radiographs radiographic results. The three-dimensional position acetabulum was recorded...

Abstract Our objectives were to determine cartilage contact stress during walking, stair climbing, and descending stairs in a well‐defined group of normal volunteers assess variations area among subjects across loading scenarios. Ten without history hip pain or disease with lateral center‐edge angle acetabular index selected. Computed tomography imaging contrast was performed on one hip. Bone surfaces segmented from volumetric image data, subject‐specific finite element models constructed...

Patient-specific instrumentation potentially improves surgical precision and decreases operative time in total knee arthroplasty (TKA) but there is little supporting data to confirm this presumption.We asked whether patient-specific would require infrequent intraoperative changes replicate a single surgeon's preferences during TKA guides fit securely.We prospectively evaluated the plan surgery 60 patients treated with 66 TKAs performed recorded any changes. A subset of six postoperative...

Periacetabular osteotomy (PAO) is the most common treatment for symptomatic acetabular dysplasia, or developmental dysplasia of hip (DDH), in skeletally mature patients. The purpose this multicenter cohort study was to delineate long-term radiographic natural history dysplastic following PAO.We evaluated all patients undergoing PAO from 1996 2012 at 3 academic institutions United States. Inclusion criteria were DDH with a minimum 5-year follow-up. Exclusion isolated retroversion, neurogenic...

Since the modern description of femoroacetabular impingement (FAI) a decade ago, surgical treatment has become increasingly common. Although ability open FAI to relieve pain and improve function been demonstrated in number retrospective studies, questions remain regarding predictability clinical outcome, factors associated with failure, complications treatment.We therefore described change after treatment, determined whether failure progression osteoarthritis was Outerbridge Grade IV hyaline...

Structural deformities of the hip, including femoroacetabular impingement (FAI) and acetabular dysplasia, often limit athletic activity. Previous studies have reported an increased prevalence radiographic cam FAI in male athletes, but data on structural hip female athletes are lacking.(1) To quantify dysplasia collegiate from 3 sports: volleyball, soccer, track field. (2) identify possible relationships between measures morphologic characteristics physical examination...

The lateral center edge angle (LCEA) and the anterior (ACEA) are commonly used to assess acetabular coverage of femoral head. There two distinct methods found in literature obtain these angles, specifically, measuring most bone versus sclerotic sourcil edge. A difference between may contribute inconsistent estimates coverage, potentially lead clinical misdiagnosis treatment mismanagement. objectives this study were quantify measurements determine how influences classification adult patients...