Unilateral laminoplasty implants

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/70 (2006.01) A61F 2/44 (2006.01)

Patent

CA 2459023

Implants (1, 30) for maintaining a distance between cut spinal bones (10) are disclosed. The implants (1, 30) are made of metal, polymer or bone allograft having ends (6A, 6B) configured to conform to the cut bone ends (10). The implants ends (1, 30) have hollow regions (4) for packing osteogenic material. The implant ends (6A, 6B; 32A, 32B) have surface projections to reduce slippage. Implants (1, 30) made of bone allograft also have spine contacting ends (6A, 6B; 32A, 32B) made of demineralized bone to speed fusion of spine (10) and implant (1, 30); they may also have bone flaps (31A, 31B) to fix the implant (30) to the spine (10). Methods of using the implants (1, 30) are also disclosed.

L'invention concerne des implants (1, 30) destinés à maintenir une certaine distance entre des os de la colonne vertébrale coupés (10). Ces implants (1, 30) sont métalliques, polymères ou constitués d'une allogreffe osseuse et possèdent des extrémités (6A, 6B) conçues pour correspondre aux extrémités d'os coupés (10). Ces implants (1, 30) possèdent des régions creuses (4) destinées à envelopper du matériel ostéogénique. Les extrémités (6A, 6B; 32A, 32B) de ces implants comportent des éléments en saillie sur leur surface afin de diminuer le glissement. Des implants (1, 30) constitués d'une allogreffe d'os comportent également des extrémités de contact avec la colonne vertébrale (6A, 6B; 32A, 32B) en os déminéralisés afin d'accélérer la fusion de la colonne vertébrale (10) et de l'implant (1, 30). Ils peuvent également comporter des fragments osseux (31A, 31B) destinés à fixer l'implant (30) à la colonne vertébrale (10). L'invention concerne également des procédés d'utilisation de ces implants (1, 30).

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