The tapered rectangular press fit femoral component design of Karl Zweymüller remains highly successful since its inception in 1979. The longitudinal taper and rectangular cross-section provide unequaled primary stability, which promotes consistent secondary osseointegration to the grit-blasted titanium surface, even in osteoporotic bone. The "fit without fill" concept provides for bone conserv...

INTRODUCTION: Squeaking of hard-on-hard hip joint bearings has recently become a concern in modern total hip arthroplasty due to its high impact on the quality of life of the patient [1]. Many factors such as malpositioning of implant play a role in the arisal of this phenomenon [2]. The probability of the excitation of audible vibrations is also related to prosthesis design [3]. In particular ...

The viability of chondrocytes in press-fit glycerol-preserved osteochondral allografts was compared to that in fresh autografts, after transplantation into load-bearing and non-load-bearing sites in mature sheep stifle joints. We used macroscopic grading, tonometer pen indentation testing, histology, sulfate uptake and viability as determined by confocal-microscopy to assess cartilage condition...

BACKGROUND Press-fit fixation of patellar tendon-bone anterior cruciate ligament autografts is an interesting technique because no hardware is necessary. For hamstring tendon grafts, no biomechanical data exist of a press-fit procedure. HYPOTHESIS Press-fit femoral fixation of hamstring tendons is mechanically equivalent to press-fit patellar tendon-bone fixation. STUDY DESIGN Controlled la...

Obtaining rigid prosthesis fixation in bone loss can be a significant challenge during revision total knee replacement (TKR).1 Stemmed prosthetic components off load stresses at the damaged metaphyseal interfaces, bypass bone defects, and provide additional prosthetic surface area for fixation.1-4 Relatively little longterm data exists documenting the durability of stemmed revision TKR and cont...

PURPOSE The objective of this study was to determine the effectiveness of the bony press-fit technique in closing oroantral communications (OACs) and oroantral fistulas (OAFs) and in identifying potential intraoral donor sites. PATIENTS AND METHODS Ten patients, 4 with OACs and 6 with OAFs, were treated with autogenous bone grafts using the bony press-fit technique. In 9 patients, dental extr...