Transtrochanteric curved varus osteotomy was designed to avoid some of the disadvantages of varus wedge osteotomy, such as post-operative leg-length discrepancy. In this retrospective study we investigated the leg-length discrepancy and clinical outcome after transtrochanteric curved varus osteotomy undertaken in patients with osteonecrosis of the
Haemophilia is a rare cause of avascular necrosis of the
Dislocation is a common and well-studied complication after total hip replacement. However, subluxation, which we define as a clinically recognised episode of incomplete movement of the
1. An investigation was made of the tolerance of the cells in the
Between 1983 and 1988 we carried out 45 Charnley low-friction arthroplasties with autografts from the
Our aim was to assess the local extent of osteocyte death in the proximal femur of 16 patients with osteonecrosis of the
We performed a series of 16 anatomical dissections
on Caucasian cadaver material to determine the surgical anatomy
of the medial femoral circumflex artery (MFCA) and its anastomoses.
These confirmed that the
We present a new CT-based method which measures cover of the
We examined the behaviour of alumina ceramic heads in 156 cemented total hip arthroplasties, at a minimum follow-up of eight years. They were divided into three groups according to the size of the
We investigated the wear characteristics and clinical performance of four different total hip joint articulations in 114 patients. Wear and migration was measured by roentgenstereophotogrammetric analysis at five years or at the last follow-up. The mean annual wear was 0.11 mm for a stainless steel/Enduron articulation, 0.34 mm for stainless steel/Hylamer cup, 0.17 mm for zirconium oxide ceramic/Enduron and 0.40 mm for zirconium oxide ceramic/Hylamer. The difference between the groups was significant (p <
0.008) except for stainless steel/Hylamer vs zirconium oxide ceramic/Hylamer (p = 0.26). At present, 12 patients have undergone a revision procedure, four at five years and eight thereafter. No patient who received a stainless steel/Enduron articulation at their primary replacement required revision. Conflicting results have been reported about the performance of the zirconium oxide ceramic
Osteonecrosis of the
We have compared four computer-assisted methods to measure penetration of the
The introduction of a trabecular tantalum rod
has been proposed for the management of early-stage osteonecrosis of
the
The use of a composite osteochondral device for simulating partial hemiarthroplasty was examined. The device was composed of a polyvinyl alcohol hydrogel and a titanium fibre mesh, acting as artificial cartilage and as porous artificial bone, respectively. The titanium fibre mesh was designed to act as an interface material, allowing firm attachment to both the polyvinyl alcohol gel (through injection moulding) and the femoral joint surface (through bony ingrowth). We implanted 22 of these devices into canine
We studied the natural history of nontraumatic avascular necrosis of the
Fifty-four cobalt-chrome alloy
Aims. The increased in vivo resistance to wear of
highly crosslinked polyethylene (HXLPE) in total hip arthroplasty
(THA) has led to an increased use of larger articulations which
have been shown to reduce the incidence of early dislocation. To
date, there are few reports of the wear of larger articulations
using second generation HXLPE liners. Our prospective cohort study
measured the bedding-in and early wear of large (36 mm and 40 mm
diameter) articulations involving a second generation X3 HXLPE liner
and compared our findings with previous clinical and in vitro studies
of the same material. Patients and Methods. The proximal penetration of the
We reviewed 41 hips in 40 patients at three to 11 years (average 6.3 years) after Sugioka transtrochanteric rotational osteotomy for non-traumatic avascular necrosis of the
During open reduction of an irreducible anterior dislocation of a total hip replacement with an Oxinium
1. A study of late segmental collapse in twelve