Total mitral valve replacement was first successfully accomplished by Starr and Edwards (1961) using a ball valve prosthesis. We have adopted their method for patients in whom the pathological changes make it impossible to obtain a mobile anterior mitral leaflet due to calcifications or shortened fused chordae tendineae. This paper describes an instrument that holds the ball valve prosthesis in...

Single aortic valve replacement with the Björk-Shiley tilting disc valve prosthesis has been performed in 50 patients since April 1971. None of the total of six deaths (12.0%) was attributable to malfunction of the prosthesis or to embolic complications. Follow-up examination showed insignificant or moderate prosthetic regurgitation in two patients and moderate paravalvular leakage in one patie...

Modular knee megaendoprotheses are commonly used devices for distal femur or proximal tibia replacement in tumor surgery as well as for treatment of some periprosthetic fractures around a loose or failed total knee arthroplasty. Structural failures of the prosthesis are well-known postoperative complications and have been reported for various prosthesis types. In the majority of the cases, the ...

Twenty-seven patients have been operated on for total replacement of the temporomandibular joint because of ankylosis due to trauma, arthritis, neoplasm, infection, or pain. One prosthesis had to be taken out because of gross infection due to Staphylococcus albus, 2 more were removed for pain and dislocation of the prosthesis, and 1 was removed because of erosion through the skin. The remaining...

INTRODUCTION AND OBJECTIVES Myringoplasty, one of the most frequent surgical techniques in otology, is the repair of tympanic membrane when the ear has only a perforation without any ossicular damage. The main objective of our work was to study the outcome of myringoplasty in patients less than 15 years of age. We also reviewed the existence of prognostic factors, such as Eustachian tube functi...

In this paper, a facile two-step Galvanic replacement reaction (GRR) is proposed to prepare Pt-Ag tubular dendritic nano-forests (tDNFs) in ambient condition for enhancing methanol oxidation reaction (MOR) under solar illumination. In the first GRR, a homogeneous layer of silver dendritic nano-forests (DNFs) with 10 μm in thickness was grown on Si wafer in 5 min in silver nitride (AgNO3) and bu...

Deep infection, the most serious local complication of total hip replacement, prompted a study of the records of 135 patients (137 hips) thus afflicted in a nationwide survey of Canada. Particular attention has been paid to the natural history of the infection, and the problems of diagnosis are described. Twenty-one patients died after the insertion, or removal, of the prosthesis, and of the su...

Ultra high molecular weight polyethylene (UHMWPE) submicron wear debris particles in total joint replacement (TJR) prosthesis have been observed clinically to cause osteolysis. In this study, the formation of UHMWPE submicron wear debris was investigated by modeling a nanoscale asperity on the surface of a CoCr femoral component of a total knee replacement (TKR) prosthesis using a Si3N4 AFM com...