Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1986-05-21
1989-06-20
Apley, Richard J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 23, 623 18, A61F 234, A61F 232
Patent
active
048406325
ABSTRACT:
Disclosed is a prosthetic hip joint defined by a femoral component and a cooperating acetabular component. The femoral component includes an intertrochanteric body which is press-fit into a correspondingly shaped intertrochanteric cavity at the top end of the patient's femur. Load transferring surfaces between the femoral implant and the femur are located within the intertrochanteric cavity and at the upper end of the femur. The load transferring surface are shaped to generate compressive stresses only. The femoral implant includes an attachable guide stem which can be resorbable and extends into the medullary cavity but which is not secured thereto to eliminate undesirable transference of stresses from the implant to the bone. The acetabular component is defined by an acetabular cup that is pressfit into a pre-reamed acetabular cavity in the patient's pelvis. An anchor bolt, which can be resorbable, is threaded into the pelvis, extends through a corresponding hole in the cup and is secured to the cup. A low friction insert, immovably attached to the interior of the cup, defines an acetabular socket which receives a cooperating ball on the femoral implant. The ball is secured to the femoral implant with a morse taper fit. Also disclosed is a procedure for implanting both components of the prothesis.
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patent: 3543749 (1970-12-01), Grove
patent: 3840904 (1974-10-01), Tronzo
patent: 3924274 (1975-12-01), Heimke et al.
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patent: 4068324 (1978-01-01), Townley
patent: 4488319 (1984-12-01), von Recum
patent: 4514865 (1985-05-01), Harris
Apley Richard J.
Isabella David J.
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