- Hip disorders and treatments
- Bone fractures and treatments
- Orthopaedic implants and arthroplasty
- Foot and Ankle Surgery
- Lower Extremity Biomechanics and Pathologies
- Shoulder Injury and Treatment
- Orthopedic Surgery and Rehabilitation
- Scoliosis diagnosis and treatment
- Hip and Femur Fractures
- Pelvic and Acetabular Injuries
- Knee injuries and reconstruction techniques
- Total Knee Arthroplasty Outcomes
- Spine and Intervertebral Disc Pathology
- Orthopedic Infections and Treatments
- Medical Imaging and Analysis
- Bone and Joint Diseases
- Sports injuries and prevention
- Musculoskeletal Disorders and Rehabilitation
- Spinal Fractures and Fixation Techniques
- Shoulder and Clavicle Injuries
- Trauma Management and Diagnosis
- Congenital limb and hand anomalies
- Elbow and Forearm Trauma Treatment
- Child Abuse and Related Trauma
- Cerebral Palsy and Movement Disorders
Yale University
2016-2025
Yale New Haven Hospital
2021-2025
Case Western Reserve University
2004-2022
Rainbow Babies & Children's Hospital
1998-2022
Pain and Rehabilitation Medicine
2018-2021
University Hospitals Cleveland Medical Center
2007-2018
Brown University
2014-2018
University Hospitals of Cleveland
1992-2018
MetroHealth Medical Center
2000-2013
University School
2010-2012
Two groups of patients who had Legg-Calvé-Perthes disease were studied. The first group consisted eighty-eight (ninety-nine affected hips) followed in three hospitals for an average forty years. second sixty-eight (seventy-two hips), all whose radiographs from the onset to maturity available and whom been treated one hospital. this thirty Each hip both study could be placed into five classes deformity based on its radiographic appearance at maturity. class showed a characteristic pattern...
Twenty adults (32 hips) with acetabular dysplasia were followed up for an average of 22 years to determine the natural history disorder. Initially, all hips had a center-edge (CE) angle Wiberg 20° or less and essentially intact Shenton's line no roentgenographic evidence osteoarthritis. Average patient age initially was 43 (range, 27–57 years) at final follow-up examination, 65 years. Various parameters hip integrity measured, including CE Wiberg, Sharp, percentage femoral head covered by...
We examined the femora of 2665 adult human skeletons from an osteological collection to determine prevalence post-slip morphology termed femoral head-tilt deformity by Murray and pistol-grip Stulberg et al. The hypothesis was that primary osteoarthrosis hip is a secondary manifestation subclinical developmental disorder hip. 8 per cent (215 skeletons). Severe more prevalent in association with (116 [38 cent] 306 hips) than matched controls (seventy-nine [26 (p < 0.005). In had unilateral...
In this study, we developed a complete description of the morphology proximal femur. Then, using framework, (1) determined normal population means, standard deviations, and ranges; (2) established differences among subpopulations; (3) showed correlations various measurements. To accomplish these objectives, analyzed 375 adult femurs. Specimens were digitally photographed in standardized positions, measurements being obtained ImageJ software. Three parameters head-neck relationship assessed....
We evaluated 38 noninstitutionalized patients with spastic quadriplegic cerebral palsy 51 dislocated hips. Nine hips had been reduced. The mean follow-up was 18 years, an average age of 26 years. At follow-up, four were ambulatory aids. Patients who could walk normal intelligence and a level pelvis. In unreduced unilateral hip dislocations, pelvic obliquity scoliosis present in 12. seven reduced similar findings only two patients. Half the painful. Based on these findings, we recommend...
Triplane fractures of the distal end tibia in fifteen children (average age, thirteen years) represented 6 per cent 237 consecutive epiphyseal ankle. Thirteen were treated by closed methods (including manipulation) and two had open reduction fractures. At an average twenty-six months after injury, three fourteen patients showed roentgenographic evidence premature symmetrical closure with less than 0.5 centimeter shortening no angular deformity. Of twelve examined clinically, a 5 to 10-degree...
In a retrospective review of eighty-two intertrochanteric fractures (twenty-nine stable and fifty-three unstable) in seventy-nine elderly, debilitated patients with associated advanced osteoporosis (Grade III or less by the system Singh et al.), fifty-six were available for follow-up: twenty-eight that had been treated at University Illinois an approximately anatomical reduction compression-screw fixation (in twenty-seven patients) Chicago reduction, fixation, adjunctive methylmethacrylate...
Humans are one of the few species undergoing an adolescent growth spurt. Because children enter spurt at different ages making age a poor maturity measure, longitudinal studies necessary to identify patterns and commonalities in growth. The standard determinant, peak height velocity (PHV) timing, is difficult estimate individuals due diurnal, postural, measurement variation. Using prospective populations healthy from two North American populations, we compared timing spurt's normalized...
Twenty-five patients with thirty congenitally dislocated hips in which avascular necrosis developed after closed reduction were followed for an average of thirty-nine years from the time reduction. Twenty-four had moderate or severe osteoarthritis and twenty-two twenty-five significant pain loss function, both, by they forty-two old, The deformities produced that related to included: (1) sphericity femoral head, (2) persistent lateral proximal subluxation, (3) irregularity medial part (4)...
Background: Plate fixation of clavicular fractures is technically difficult because the complex anatomy bone, with an S-shaped curvature and a cephalad-to-caudad bow. The purpose present study was to characterize variations in determine clinical applicability anatomic precontoured plate designed for fracture fixation. Methods: One hundred pairs clavicles were analyzed. location magnitude superior bow determined use digitizer modeling software. Axial radiographs made each clavicle Acumed...
Summary: We report a multicenter long-term follow-up study of patients with septic arthritis the hip during infancy or childhood. Group I ("infantile") consisted onset before age 3 months, and II ("childhood") in whom occurred after months. Patients were specifically examined for this review. Generally, at had poor anatomic appearance radiographically scored poorly on Harris rating system. However, pain activity restriction minimal. who not treated operatively tended to function better than...
The term “acetabular dysplasia” suggests a smaller than normal acetabulum or one that is abnormally vertical. Acetabular dysplasia has been linked to the development of hip osteoarthritis over last 90 years in 3 ways. First, it through concept biomechanical forces can cause osteoarthritis. A will result contact surface between femoral head and acetabulum. This generate increased pressure per unit area, which precipitate articular cartilage failure when reaches critical point. Osteoarthritis...
Ipsilateral fractures of the humerus and forearm are uncommon injuries in children. The incidence compartment syndrome association with these is controversial. authors reviewed 978 consecutive children admitted to hospital upper extremity long bone during a 13-year period. Forty-three ipsilateral were identified. Of 33 supracondylar fracture fracture, three (7%) had develop required fasciotomies. All cases occurred among nine displaced extension fractures; was 33% this group. These findings...
Abstract The morphologic features of the proximal femur are used in preoperative planning prior to total hip arthroplasty. Recent literature evaluating anatomy femur, as it relates arthroplasty, has relied heavily on radiographs or computed tomography. We digital photographs compare 200 cadaveric femora individuals who died 40 years age: 25 African‐American males, females, Caucasian females. With our technique and definition, actual angles dimensions that we normally rely during arthroplasty...
The contralateral femur frequently is used for preoperative templating THA or hemiarthroplasty when the proximal deformed by degenerative changes fracture. Although femoral symmetry assumed in these situations, it unclear to what degree symmetrical.We therefore defined of asymmetry between left and right femurs determined whether was affected demographics anatomy.We obtained 160 paired from individuals (20-40 years old), evenly distributed gender ethnicity (African-American Caucasian)....
Background: It has been proposed that the epiphyseal tubercle on inferior surface of capital femoral epiphysis may be responsible for clinical distinction between a stable and an unstable slipped (SCFE). The anatomy its relationship to lateral vessels have not previously rigorously defined. Methods: Twenty-two cadaveric epiphyses from donors who had three seventeen years age were analyzed then digitized with use high-resolution laser scanner. height, location, approximate area measured...
Understanding skeletal maturity is important in the management of idiopathic scoliosis. Iliac apophysis, triradiate cartilage, hand, and calcaneal ossification patterns have previously been described to assess both peak height velocity (PHV) percent growth remaining; however, these markers may not be present on standard spine radiographs. The purpose this study was describe a novel assessment method based proximal humeral epiphyseal patterns.Ninety-four children were followed at least...
We recently developed a classification system to assess skeletal maturity by scoring proximal humeral ossification in similar way the canonical Risser sign. The purpose of present study was determine whether our can be used reliably radiographs spine for modern patients with idiopathic scoliosis, it combination Sanders hand system, and consideration patient factors such as age, sex, standing height improves accuracy predictions.We retrospectively reviewed 414 randomized from 216 scoliosis...
Assess the characteristics associated with risk of complications and mortality in children sustaining pelvic fractures.Urban university pediatric Level I trauma center a large metropolitan community.Retrospective analysis 57 consecutive 66 fractures seen between 1993 1999.Fifty-two patients were treated nonoperatively, five required operative stabilization (four acetabular one partial sacroiliac joint disruption).Type cause fracture, type management used, incidence injuries, hemorrhage...
Background: Plate fixation of clavicular fractures is technically difficult because the complex anatomy bone, with an S-shaped curvature and a cephalad-to-caudad bow. The purpose present study was to characterize variations in determine clinical applicability anatomic precontoured plate designed for fracture fixation. Methods: One hundred pairs clavicles were analyzed. location magnitude superior bow determined use digitizer modeling software. Axial radiographs made each clavicle Acumed...
Recently, gender-specific designs of total knee replacement have been developed to accommodate anatomical differences between males and females. We examined a group male female distal femora matched for age height, determine if there was difference in the aspect ratio (mediolateral distance versus anteroposterior distance) height anterior flange genders. The Hamann-Todd Collection provided 1207 skeletally mature cadaver femora. femoral length, lateral medial flanges mediolateral width were...
Background: Ossification of the calcaneal apophysis has never been fully characterized. We examined ossification sequence calcaneus in relation to iliac and timing peak height velocity (PHV). Methods: Ninety-four healthy children (forty-nine girls forty-five boys), from three eighteen years old, were followed longitudinally through growth with annual serial radiographs physical examinations. These done at least annually ten fifteen age. The PHV was calculated using measurements each child....
The ability to estimate skeletal maturity using a knee radiograph would be useful in anterior cruciate ligament (ACL) injuries and limb-length discrepancy immature patients. Currently, quick, accurate, reproducible method is lacking.Serial radiographs made 3 years before 2 following the chronologic age associated with 90% of final height (an enhanced gold standard compared peak velocity) were analyzed 78 children. Pyle Hoerr (PH) was simplified by developing discrete stages for distal part...
During anterior cruciate ligament reconstruction, proper femoral tunnel placement is important. The purpose of the present study was to characterize osseous anatomy intercondylar notch.We studied morphology notch in 200 human femora from skeletally mature donors, with specific attention being paid ridge on lateral wall and posterolateral rim notch. distances inlet (notch depth) were measured at nine, ten, eleven o'clock positions for right knees one, two three left knees.The 194 absent six....