Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Hip 725 articles


Reliability and Agreement of Measures Used in Radiographic Evaluation of the Adult Hip

Nicholas H. Mast MD, Franco Impellizzeri PhD, Stephan Keller MD, Michael Leunig MD

Several mechanical derangements reportedly contribute to the development of noninflammatory arthritis of the hip. Diagnosis of these derangements involves the use of specific radiographic measures (eg, alpha angle, lateral center edge angle, cross-over sign). The reliability of some of these measures is not known, whereas others have not been confirmed.

Do Ion Levels In Hip Resurfacing Differ From Metal-on-metal THA at Midterm?

A. Moroni MD, L. Savarino BSc, M. Hoque PhD, M. Cadossi MD, N. Baldini MD

Metal-on-metal Birmingham hip resurfacing (MOM-BHR) is an alternative to metal-on-metal total hip arthroplasty (MOM-THA), especially for young and/or active patients. However, wear resulting in increased serum ion levels is a concern.

Risk of Subsequent Revision after Primary and Revision Total Joint Arthroplasty

Kevin L. Ong PhD, Edmund Lau MS, Jeremy Suggs ScD, Steven M. Kurtz PhD, Michael T. Manley FRSA, PhD

Revision is technically more demanding than primary total joint arthroplasty (TJA) and requires more extensive use of resources. Understanding the relative risk of rerevision and risk factors can help identify patients at high risk who may require closer postsurgical care.

Femoral Morphologic Differences in Subtypes of High Developmental Dislocation of the Hip

Haijun Xu MD, Yixin Zhou MD, PhD, Qing Liu MD, Qiheng Tang MD, Jianhua Yin MD

Previous studies show the shape of the femur in developmental dislocation of the hip (DDH) becomes more abnormal with increasing subluxation. Two kinds of high dislocations associated with DDH have been observed in clinical practice, one with (Type C1) and one without (Type C2) a false acetabulum. The presence or absence of a false acetabulum in high dislocated hips is associated with different loading patterns and could influence the development and shape of the proximal femur.

Modular Necks Improve the Range of Hip Motion in Cases with Excessively Anteverted or Retroverted Femurs in THA

Akinobu Matsushita MD, PhD, Yasuharu Nakashima MD, PhD, Masanori Fujii MD, Taishi Sato MD, Yukihide Iwamoto MD, PhD

Anteversion of an acetabular component often is difficult to ascertain in patients with THA in whom excessively anteverted or retroverted femurs may result in limited ROM or risk of dislocation. Restriction of motion, however, is determined by the combination of version of both components.

Use of Morphometry to Quantify Osteolysis after Total Hip Arthroplasty

Lindsay K. Smith MSc, MCSP, Fiona Cramp PhD, MCSP, Shea Palmer PhD, MCSP, Nikki Coghill PhD, Robert F. Spencer MD, FRCS

Progressive osteolysis threatens the longevity of hip arthroplasties and radiographic review is recommended. Measurement of osteolytic lesions in a clinical setting has not been achieved easily in the past. Other radiologic investigations provide accurate information but cost and risk to the patient prohibit their use in routine review.

Effect of Prior Salter or Chiari Osteotomy on THA with Developmental Hip Dysplasia

Kenji Tokunaga MD, Nadim Aslam MD, FRCSC, Rad Zdero PhD, Emil H. Schemitsch MD, FRCSC, James P. Waddell MD, FRCSC

Controversy exists regarding the outcome of THA after prior pelvic osteotomy.

Cams and Pincer Impingement Are Distinct, Not Mixed: The Acetabular Pathomorphology of Femoroacetabular Impingement

Justin Cobb MCh, Kartik Logishetty BSc, Kinner Davda MRCS, Farhad Iranpour MD

Many impinging hips are said to have a mix of features of femoral cam and an overcovered acetabulum causing pincer impingement. Correction of such a mixed picture by reduction of the cam lesion and the acetabular rim is the suggested treatment.

Minimally Invasive versus Classic Procedures in Total Hip Arthroplasty: A Double-blind Randomized Controlled Trial

Jon H. M. Goosen MD, PhD, Boudewijn J. Kollen PhD, René M. Castelein MD, PhD, Bart M. Kuipers MD, Cees C. Verheyen MD, PhD

For total hip arthroplasty (THA), minimally invasive surgery (MIS) uses a smaller incision and less muscle dissection than the classic approach (CLASS), and may lead to faster rehabilitation.

Femoral Head-neck Junction Deformity is Related to Osteoarthritis of the Hip

Hilton José Melo Barros MD, Gilberto Luis Camanho MD, PhD, Antônio Carlos Bernabé MD, PhD, Marcelo Bordalo Rodrigues MD, Luiz Eugênio Garcez Leme MD, PhD

Primary or idiopathic osteoarthritis (OA) of the hip has increasingly been attributed to the presence of presumably minor femoral or acetabular deformities that are not routinely identified. The alpha angle reflects one such deformity of the femoral neck and reflects a risk for femoroacetabular impingement, which in turn reportedly is associated with OA. If impingement is in fact associated with OA, then one might expect the mean alpha angle to be greater in patients with presumed idiopathic hip OA.