Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Hip 719 articles


Symptomatic Femoroacetabular Impingement: Does the Offset Decrease Correlate With Cartilage Damage? A Pilot Study

Christoph Zilkens MD, Falk Miese MD, Rüdiger Krauspe MD, Bernd Bittersohl MD

Current measures of the reduced head-neck offset such as residual deformity of slipped capital femoral epiphysis (SCFE) including the alpha angle, which measures the femoral head-neck sphericity but does not account for acetabular abnormalities, do not represent the true magnitude of the deformity and the mechanical consequences. The beta angle (angle between the femoral head-neck junction and acetabular rim) accounts for the morphology of both the acetabulum and femur and, thus, may be the more appropriate parameter for assessing SCFE deformity.

A Reduction in Body Mass Index Lowers Risk for Bilateral Slipped Capital Femoral Epiphysis

Adam Y. Nasreddine MA, Benton E. Heyworth MD, David Zurakowski PhD, Mininder S. Kocher MD, MPH

Slipped capital femoral epiphysis (SCFE) is occurring in greater numbers, at increasingly younger ages, and more frequently bilaterally (BL-SCFE). Obesity is one risk factor for SCFE. However, it is unclear whether postoperative decreases or increases in body mass index (BMI) alter the risk of subsequent contralateral SCFE.

Novel CT-based Three-dimensional Software Improves the Characterization of Cam Morphology

Michael T. Milone BA, Asheesh Bedi MD, Lazaros Poultsides MD, PhD, Erin Magennis BA, J. W. Thomas Byrd MD, Christopher M. Larson MD, Bryan T. Kelly MD

Incomplete correction of femoral offset and sphericity remains the leading cause for revision surgery for symptomatic femoroacetabular impingement (FAI). Because arthroscopic exploration is technically difficult, a detailed preoperative understanding of morphology is of paramount importance for preoperative decision-making.

Increased Acetabular Depth May Influence Physeal Stability in Slipped Capital Femoral Epiphysis

David A. Podeszwa MD, David Gurd MD, Anthony Riccio MD, Adriana Rocha MS, Daniel J. Sucato MD, MS

Multiple mechanical factors affecting the hip have been associated with the development of slipped capital femoral epiphysis (SCFE). Whether acetabular depth plays a role in the development of a SCFE has not been elucidated.

Skin Crease ‘Bikini’ Incision for Anterior Approach Total Hip Arthroplasty: Surgical Technique and Preliminary Results

Michael Leunig MD, Michael Faas MD, Fabian Knoch MD, Florian D. Naal MD

The direct anterior approach for THA allows implantation through an internervous plane without muscle detachment from bone. However, the classic longitudinal skin incision does not follow the anatomic skin creases and can result in scar widening. We therefore modified our incision technique to a short oblique skin incision following the anatomic skin crease of the groin.

A Positive Hip Arthrogram May Predict Lower Function in Patients with Primary Hip Arthroplasty

Jason B. T. Lim MBChB (Hons), Lynne Horey MA, Sanjeev Patil FRCS (Tr & Orth), Robert M. D. Meek MD, FRCS (Tr & Orth)

A local anesthetic hip arthrogram is a simple test mainly used as an adjunct to define the origin of hip pain. Temporary pain relief (a positive response) following an injection may lead to a surgeon recommending hip surgery. However, it is unclear whether relief of pain corresponds to better postoperative pain relief or function.

Heterotopic Bone Formation About the Hip Undergoes Endochondral Ossification: A Rabbit Model

Oliver Tannous MD, Alec C. Stall MD, Cullen Griffith MD, Christopher T. Donaldson MD, Rudolph J. Castellani MD, Vincent D. Pellegrini MD

Heterotopic ossification (HO) occurs most commonly after trauma and surgery about the hip and may compromise subsequent function. Currently available animal models describing the cellular progression of HO are based on exogenous osteogenic induction agents and may not reflect the processes following trauma.

Impingement Adversely Affects 10-year Survivorship After Periacetabular Osteotomy for DDH

Christoph E. Albers MD, Simon D. Steppacher MD, Reinhold Ganz MD, Moritz Tannast MD, Klaus A. Siebenrock MD

Although periacetabular osteotomy (PAO) for developmental dysplasia of the hip (DDH) provides conceptual advantages compared with other osteotomies and reportedly is associated with joint survivorship of 60% at 20 years, the beneficial effect of proper acetabular reorientation with concomitant arthrotomy and creation of femoral head-neck offset on 10-year hip survivorship remains unclear.

Wear of a 5 Megarad Cross-linked Polyethylene Liner: A 6-year RSA Study

Stuart A. Callary BAppSc, David G. Campbell BMBS, FRACS, PhD, Graham Mercer BMBS, FRACS, Kjell G. Nilsson MD, PhD, FRACS, John R. Field MSc, BVSc, DVSc, PhD

One cross-linked polyethylene (XLPE) liner is manufactured using a lower dose of radiation, 5 Mrad, which may result in less cross-linking. The reported in vivo wear rate of this XLPE liner in patients undergoing THA has varied, and has included some patients in each reported cohort who had greater than 0.1 mm/year of wear, which is an historical threshold for osteolysis. Previous studies have measured wear on plain radiographs, an approach that has limited sensitivity.

Do Professional Athletes Perform Better Than Recreational Athletes After Arthroscopy for Femoroacetabular Impingement?

Ajay Malviya FRCS (Tr & Orth), Christos P. Paliobeis MD, Richard N. Villar BSc, MA, MS

Although a large number of athletes’ returns to sports after hip arthroscopic surgery for femoroacetabular impingement (FAI), it is not clear if they do so to the preinjury level and whether professional athletes (PA) are more likely to return to the preinjury level compared with recreational athletes (RA).