Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Hip 723 articles


The Fate of Hips That Are Not Prophylactically Pinned After Unilateral Slipped Capital Femoral Epiphysis

Yaser M. K. Baghdadi MD, A. Noelle Larson MD, Rafael J. Sierra MD, Hamlet A. Peterson MD, Anthony A. Stans MD

The indications for prophylactic pinning of the contralateral hip after unilateral slipped capital femoral epiphysis (SCFE) remain controversial in part because the natural history of the contralateral hip is unclear.

New Radiographic Index for Evaluating Acetabular Version

Hiroshi Koyama MD, Hironobu Hoshino MD, PhD, Daisuke Suzuki MD, Shoichi Nishikino MD, Yukihiro Matsuyama MD, PhD

Several qualitative radiographic signs have been described to assess acetabular retroversion. However, quantitative assessment of acetabular version would be useful for more rigorous research purposes and perhaps to diagnose and treat hip disorders.

Case Report: Painless Chronic Liner Dissociation of a Total Hip Arthroplasty

Jorm M. Nellensteijn MD, David R. Nellensteijn MD, Tjitte Jong MD

Dislocation or liner dissociation of a total hip prosthesis usually results in pain and discomfort. Although several reports describe chronic dislocation and its treatment, chronic liner dissociation is an unreported complication.

Smoking May Be a Harbinger of Early Failure With Ultraporous Metal Acetabular Reconstruction

Adolph V. Lombardi MD, Keith R. Berend MD, Joanne B. Adams BFA, Ryan C. Jefferson BS, Michael A. Sneller BS

Smoking is considered a risk factor for surgical complications in total hip arthroplasty (THA) and has been linked to a higher rate of aseptic loosening in uncemented acetabular components. Acetabular reconstruction with newer ultraporous metals in both complex primary and revision THA has increased survivorship but it is unclear whether smoking affects survival of these implants.

Growth Plate Alteration Precedes Cam-type Deformity in Elite Basketball Players

Klaus A. Siebenrock MD, Anna Behning MD, T. Charles Mamisch MD, Joseph M. Schwab MD

Vigorous sporting activity during the growth years is associated with an increased risk of having a cam-type deformity develop. The underlying cause of this osseous deformity is unclear. One may speculate whether this is caused by reactive bone apposition in the region of the anterosuperior head-neck junction or whether sports activity alters the shape of and growth in the growth plate. If the latter is true, then one would expect athletes to show an abnormal shape of the capital growth plate (specifically, the epiphyseal extension) before and/or after physeal closure.

The Shape of the Proximal Femur Influences Acetabular Wear Patterns Over Time

Jonathan J. Streit MD, Ari Levine MD, Ian J. Barrett BS, Daniel R. Cooperman MD, Victor Goldberg MD

Femoroacetabular impingement has been proposed as a cause of early osteoarthritis, but it is not known how this develops over time or whether the shape of the proximal femur influences this risk.

Is Limited Incision Better Than Standard Total Hip Arthroplasty? A Meta-analysis

Joseph T. Moskal MD, Susan G. Capps PhD

The literature comparing limited incision and standard incision THAs is confusing regarding whether limited incision THA improves short-term recovery without compromising long-term durability and survival. Further, previously published meta-analyses cannot conclude that limited incision THA is better. With new data, we seek to discover if the answers now exist.

Case Reports: Acetabular Damage After Mild Slipped Capital Femoral Epiphysis

Cara Beth Lee MD, Travis Matheney MD, Yi-Meng Yen MD, PhD

Slipped capital femoral epiphysis (SCFE) is a common hip problem in adolescents that results in a cam-type femoroacetabular impingement (FAI) deformity. Although the treatment for mild (slip angle of 0°–30°) and moderate (slip angle of 31°–60°) SCFE has historically been in situ fixation, recent studies have demonstrated impingement-related articular damage, irrespective of slip severity. Our series confirms previous reports that acetabular chondral injury occurs in mild to low-moderate (slip angle of ≤ 40°) SCFE.

Contact Patch to Rim Distance Predicts Metal Ion Levels in Hip Resurfacing

James P. Yoon BA, Michel J. Le Duff MA, Alicia J. Johnson BA, Karren M. Takamura BA, Edward Ebramzadeh PhD, Harlan C. Amstutz MD

Component design, size, acetabular orientation, patient gender, and activity level have been suggested as factors leading to elevated metal ion concentrations after-on-metal hip resurfacing arthroplasty (MMHRA). The calculation of the contact patch to rim (CPR) distance integrates component size, design, and acetabular orientation and may be a good predictor of elevated metal ion levels.

Does Femoral Rotation Influence Anteroposterior Alpha Angle, Lateral Center-edge Angle, and Medial Proximal Femoral Angle? A Pilot Study

Shafagh Monazzam MD, James D. Bomar MPH, Mandar Agashe MD, Harish S. Hosalkar MD

Femoral rotation on AP radiographs affects several parameters used to assess morphologic features of the proximal femur but its effect on femoroacetabular impingement parameters remains unknown.