Implant

A - Human Necessities – 61 – C

Patent

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Details

A61C 8/00 (2006.01) A61B 17/86 (2006.01)

Patent

CA 2336251

Implant (10) having a shaft which is adapted in use to be embedded in bone tissue and which has an outer surface provided with a circumferentially- oriented roughness. The circumferentially-oriented roughness has first and second axial sections (19, 21) with each section comprising a series of circumferentially-oriented peaks which have a crest and which are axially spaced apart by troughs. The axial spacing (d) between the crests of adjacent peaks in the first axial section (19) is less than the axial spacing (3d) between the crests of adjacent peaks in the second axial section (21). Although the axial spacing between the crests of adjacent peaks in the first and second axial sections of circumferentially-oriented roughness differs, the first and second axial sections of circumferentially-oriented roughness are adapted in use to provide the same or substantially the same pitch.

L'invention porte sur un implant (10) doté d'une tige et qui est adapté pour être incorporé dans le tissu osseux et dont la surface externe est pourvue d'aspérités orientées de manière circonférentielle. Ces aspérités comportent des première et seconde sections (19, 21) axiales, chaque section possédant une série de pics orientés de manière circonférentielle et comportant une crête, et qui sont espacés axialement les uns des autres par des creux. L'espacement (d) axial entre les crêtes des pics adjacents de la première section (19) axiale est inférieur à l'espacement (3d) axial entre les crêtes des pics adjacents de la seconde section axiale. Bien que l'espacement axial entre les crêtes des pics adjacents des première et seconde sections axiales des aspérités circonférentielles soit différent, les première et seconde sections axiales des aspérités circonférentielles sont adaptées pour avoir, en utilisation, le même ou pratiquement le même pas.

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