Of 142 Chiari pelvic osteotomies for osteoarthritis in dysplastic hips, most performed by Chiari himself, we were able to review 82 and obtain information about 18 by questionnaire. All patients were over 30 years of age at operation; follow-up averaged 15.5 years. Twenty hips had undergone secondary total hip replacement. The outcome was good in 75%, fair in 9% and poor in 16%. High osteotomie...

INTRODUCTION Developmental dysplasia of the hip (DDH) is an important disease leading to osteoarthritis (OA), as it is well established that high stress concentrations during weight-bearing ambulation cause osteoarthritis. Historically, static geometric factors, e.g. center-edge (CE) angle, Sharp angle, Acetabular roof obliquity (ARO), and acetabular head index (AHI), have been used to quantify...

Between 1992 and 1997, we undertook a prospective, targeted clinical and ultrasonographic hip screening programme to assess the relationship between ultrasonographic abnormalities of the hip and clinical limitation of hip abduction. A total of 5.9% (2 of 34) of neonatal dislocatable hips and 87.5% (7 of 8) of 'late' dislocated hips seen after the age of six months, presented with unilateral lim...

A large number of short stem prostheses for hip -arthroplasty have been introduced in the past years. Although there is a large increase of publications about short stems, there is still little data available about survival and revision rates. We report prospectively on the outcome of 84 consecutive NANOS® short stem prostheses in 81 patients. We have included 37 female patients and 44 male pat...

Difficulties posed in managing developmental dysplasia of the hip diagnosed late include a high-placed femoral head, contracted soft tissues and a dysplastic acetabulum. A combination of open reduction with femoral shortening of untreated congenital dislocations is a well-established practice. Femoral shortening prevents excessive pressure on the located femoral head which can cause avascular n...

The biomechanical factors influencing reduction of dislocated hips by the Pavlik harness in patients of Developmental Dysplasia of the Hip (DDH) were studied using a three-dimensional dynamic computer model capable of simulating hip reductions in (1) subluxated and (2) fully dislocated hip joints. Eight hip adductor muscles were identified as key mediators in the prognosis of hip dysplasia and ...

We have divided Severin group-V severely dysplastic hips with a false acetabulum into three subtypes, based on the height and shape of the socket. We performed rotational acetabular osteotomy (RAO) in 19 hips in 17 young adults with a type-1 'low' false acetabulum which had direct contact with the true acetabulum. This is a periacetabular osteotomy which gives acetabular coverage with articular...

e Bernese rotational acetabular osteotomy (RAO) was developed in 1983 (1) in order to prevent the development of arthrosis in young patients with hip dysplasia, and several reports on satisfactory results have subsequently been published (2–9). e RAO performed through the two most frequently used approaches, the ilioinguinal and Smith-Petersen, requires a broad dissection of the pelvic bones an...

We evaluated 31 patients with bilateral dysplastic hips who had undergone periacetabular osteotomy for early (Tönnis grade 0 or 1) or moderate (Tönnis grade 2) osteoarthritis in one hip and total hip replacement for advanced (Tönnis grade 3) osteoarthritis in the other. At a mean follow-up of 5.5 years (2 to 9) after periacetabular osteotomy and 6.7 years (3 to 10) after total hip replacement, ...

BACKGROUND Cotyloplasty is a technique that involves making a perforation of the medial wall of a shallow acetabulum and then inserting an acetabular cup with the medial aspect of its dome beyond the Kohler line. The purpose of this study was to evaluate the results of cementless total hip arthroplasty (THA) using cotyloplasty with focusing on the amount of medial cup protrusion. METHODS Sixt...