Hip prosthesis has double offset femoral member with conical rounded end adapted to section of neck trapezoidal circle, and cotyloid cup consisting of metallic dome, semi-spherical insert, and semi-spherical screws

• Main Authors: SUSO VERGARA SANTIAGO, GALLART CASTANY XAVIER
• Format: Patent
• Language: English; Spanish
• Published: 16.11.2006
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; TREATMENT OR PROTECTION OF EYES OR EARS

A femoral member of double offset construction has a distal, conical rounded end adapted to a section of a neck trapezoidal circle. A cotyloid cup consists of a metallic dome, an insert, and screws. Both inserts and screws are of semi-spherical shapes with smoothed zones for non-contact with the bottom of the acetabulum. A section of minimal thickness is defined between the interior zone of the dome and the exterior of the insert. A femoral member of double offset construction has a distal, conical rounded end adapted to a section of a neck trapezoidal circle. A cotyloid cup consists of a metallic dome, an insert, and screws. Both inserts and screws are of semi-spherical shapes with smoothed zones for non-contact with the bottom of the acetabulum. A section of minimal thickness is defined between the interior zone of the dome and the exterior of the insert. Prótesis total de cadera perfeccionada. Constituida por un vástago femoral con doble offset para facilitar mejor adaptación anatómica con sección de cuello círculo-trapezoidal y diámetro máximo de cono igual al diámetro del cuello, con aristas entre el final del cono y resto del cuello, con extremo distal en forma de punta cónica redondeada y pulido para evitar concentración anómala de tensiones en la diáfisis ósea. Un cotilo formado por tres elementos, cúpula metálica, inserto y tornillos con forma semiesférica, zona polar aplanada para evitar contacto con el fondo del acetábulo y aumento de radio en zona ecuatorial obteniendo encaje press-fit en zona subcondral. Perfil exterior anatómico con tres escotaduras iguales a los del reborde acetabular original. La cúpula metálica tiene espesor mínimo existiendo máxima congruencia entre zona interior de cúpula metálica y exterior del inserto aumentando la superficie para transmisión de cargas produciéndose menos deformación y desgaste del inserto.