Management of periprosthetic fracture above total knee arthroplasty using intramedullary fibular allograft and plate fixation.

We report a series of comminuted periprosthetic fractures above total knee arthroplasties in 3 patients who were treated by using an intramedullary fibular strut allograft and a lateral buttress plate. The patients, whose ages ranged from 74 to 90 years, were grossly osteopenic on radiographs. All 3 fractures healed in a satisfactory alignment without any complications.

Functional outcome of total knee arthroplasty after high tibial osteotomy.

Objective: To evaluate the functional outcome for patients who undergo total knee arthroplasty (TKA) after high tibial osteotomy (HTO).

Design: Retrospective matched cohort study.

Setting: University of Toronto affiliated hospital.

Osseointegration of hydroxyapatite porous-coated femoral implants in a canine model.

This study evaluated the quality and quantity of osseointegration of two thicknesses of hydroxyapatite coating on press-fit, porous-coated titanium implants in a canine hip model. In 12 dogs, titanium press-fit porous-coated prostheses were implanted. The stems had a 50-microm thickness hydroxyapatite coating, 100-microm thickness hydroxyapatite coating, or no hydroxyapatite coating.

Cement penetration with pulsed lavage versus syringe irrigation in total knee arthroplasty.

Twelve total knee arthroplasties were performed on 12 patients who had osteoarthritis. The freshly resected tibial plateaus and femoral condyles were divided in 2, and each half was subjected to different methods of preparation. One half of the specimen was irrigated with saline with a standard bulb syringe, while the other half was irrigated with pulsed lavage.

Migration of polyethylene wear debris in hip arthroplasties: a canine model.

The distal migration of polyethylene wear debris appears to be a major cause of loosening and osteolysis of cementless total hip arthroplasties. The use of modern cementing techniques, circumferential porous or hydroxyapatite (HA) coating has been advocated as a means of preventing access of the particles to the bone-implant interface. The purpose of this study was to compare the ability of different methods of implant fixation to prevent wear debris migration.