Endoprosthesis

Details Endoprosthesis Endoprosthesis

A - Human Necessities

61

F

A61F 2/34 (2006.01) A61F 2/32 (2006.01) A61F 2/36 (2006.01)

Patent

CA 2200064

An implantation method is described which involves the successive introduction of projecting multilateral needles into the spongy bone of a joint. The needles are symmetrically spaced on the terminal surfaces of the endoprosthesis up to a resistance edge on one portion of an endoprosthesis and up to a resistance surface on a second portion of the endoprosthesis. The remaining free area between the projecting multilateral needles is filled up to the terminal surfaces in the "biological silence" by osteoblasts. The endoprosthesis also includes a glenoid cavity and a head which have round terminal surfaces with the projecting multilateral needles placed thereon. The projecting multilateral needles have different lengths and mutually parallel axes which are perpendicular to the planes in which the round resistance edge of the glenoid cavity and the resistance plane of the head are located.

Procédé d'implantation consistant à introduire successivement dans l'os spongieux des saillies pointues multifaces, celles-ci étant placées de manière symétrique sur les faces terminales de l'endoprothèse, et s'étendant jusqu'au point de contact entre son bord et la surface d'appui, tandis que le volume libre restant entre les saillies pointues est rempli d'ostéoblastes jusqu'aux surfaces terminales dans le "silence biologique". Cette endoprothèse est caractérisée en ce qu'elle est composée de la cavité glénoïde (1) et de la tête (2), lesquelles ont des faces terminales arrondies (3 et 11), les saillies pointues multifaces (4) étant placées sur celles-ci (1, 2) de sorte qu'elles ont des longueurs différentes et des axes parallèles entre eux et perpendiculaires aux plans dans lesquels s'étend le bord d'appui arrondi (6) de la cavité glénoïde (1) ainsi que le plan d'appui (10) de la tête.

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