Mark A. Klaassen

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We prospectively examined the relationship between preand postoperative range of motion utilizing three cruciate retaining knees with various mechanical flexion potential, i.e., two at about 130–135 degrees (one with a bearing having a posterior lip and the other without) and the third at about 140–145 degrees. Combining data from the three cohorts,(More)
Press-fit acetabular cups without screw holes can limit migration of particulate wear debris and reduce risk of acetabular osteolysis and device loosening. The Tri-Spike cup (Biomet, Inc, Warsaw, Ind) includes a titanium alloy plasma spray porous surface and does not require screw fixation. We retrospectively examined the incidence of cup loosening and(More)
Activated blood platelets play a critical, early role in the wound healing response by releasing several types of growth factors at the site of injury which mediate the initial stages of tissue repair. Autologously derived platelet-rich plasma has been applied during surgery as a healing aid and some studies have shown benefit with total joint arthroplasty(More)
We prospectively examined the relationship between pre- and postoperative range of motion utilizing three cruciate retaining knees with various mechanical flexion potentials, i.e., two at about 130 degrees -135 degrees (one with posterior lip and the other without) and the third at about 140 degrees -145 degrees . All groups demonstrated mean flexion and(More)
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