Long-term results of total hip arthroplasty with a cemented custom-designed swan-neck femoral component for congenital dislocation or severe dysplasia: a follow-up note.

Background: This follow-up study updates the results in a consecutive series of nineteen cemented total hip replacements with a swan-neck femoral component in patients with congenital dislocation or severe hip dysplasia. The series was previously reported on in 1993.

Methods: The patients were petite, with an average height of 152 cm and an average weight of 50 kg, and the femoral canals could not accommodate an off-the-shelf femoral component.

Cementless hemispheric acetabular components. A 4- to 8-year follow-up report.

A retrospective radiographic analysis was performed on 71 cementless acetabular components followed from 4 to 8 years after surgery. A Harris-Galante (Zimmer, Warsaw, IN) cup was used in 46 cases and an Optifix (Smith & Nephew Richards, Memphis, TN) cup was used in 25 cases. There were 66 primary and 5 revision cases.

The use of expanded polytetrafluoroethylene as an interpositional membrane after lumbar laminectomy.

Study Design: Prevention of post-laminectomy membrane formation was evaluated in a canine model. Fat graft, Silastic sheeting and expanded polytetrafluoroethylene were compared with nonimplanted control sites.

Objectives: The development of an effective barrier to peridural scar invasion is of major importance in optimizing results after lumbar laminectomy.

Cementless hemispheric acetabular components. 2-4-year results.

A retrospective clinical and radiographic analysis was performed on 99 patients (106 hips) undergoing total hip arthroplasty with noncemented Harris-Galante (Zimmer, Warsaw, IN) or Optifix (Smith Nephew Richards, Memphis, TN) acetabular components. There were 94 primary and 12 revision procedures with a minimum follow-up period of 24 months (range, 24-52 months). The cups were evaluated for evidence of vertical and horizontal migration, as well as the presence of radiolucencies at the bone-implant interface.

Prevention of longitudinal crack propagation around a femoral prosthesis: a study of cerclage wire fixation.

This study examined the effect of single versus triple-wrap cerclage fixation techniques in preventing propagation of a longitudinal fracture around a cementless femoral prosthesis. A proximal filling femoral component was implanted in 14 matched pairs of fresh-frozen bovine femora, following placement of a 45-mm longitudinal crack in the anteromedial cortical wall of the proximal femur. In one group of seven pairs, a single cerclage wire was applied to one specimen of each pair.

The current status of acetabular fixation in total hip replacement.

Aseptic loosening of the acetabular component is the major long-term complication of cemented total hip replacement. In this article, the improvements in cementing technique and cemented acetabular component design, as well as the evolution of noncemented acetabular cups, are reviewed. The porous-coated acetabular component has emerged as the state of the art in both primary and revision hip arthroplasty.

Longitudinal crack propagation in bone around femoral prosthesis.

Intraoperative femoral fracture is a well-recognized technical complication of cementless total hip arthroplasty. This study was designed to establish an in vitro model for initiation and propagation of fractures of the proximal femur in cementless THA and to assess the effect of fracture fixation in the form of cerclage wiring and drilling a hole in the distal extent of the fracture line. Fourteen human anatomic femur specimens were studied.

Strength of cerclage fixation systems: a biomechanical study.

This study examined the load to failure ratio and stiffness of eight different cerclage techniques commonly used in the clinical management of fractures. For a single-loop cerclage, titanium cable was the strongest, while stainless steel wire secured with a commercial tightener was the weakest (P < 0.05).

Intravenous pyogenic granuloma of the hand.

Intravenous pyogenic granuloma is a recently described counterpart of cutaneous pyogenic granuloma. We report the second known case of this entity in the orthopedic and hand surgery literature and describe the characteristic clinical and histologic findings associated with this rare benign tumor.