Bone plate system

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/80 (2006.01)

Patent

CA 2408327

The present invention relates to a bone plating system and method for fracture fixation of bone. The bone plating system includes a bone plate (30; 50; 80), at least one locking screw (20), and at least one non-locking screw (10). The bone plate (30; 50; 80) has locking holes (36; 56; 86) with threads (40) and non-locking holes (38; 58; 88). The locking screws (20) have a shaft (26) with a thread for engaging bone and a head (22) with a thread (24) configured and dimensioned to mate with the thread (40) of the locking holes (36; 56; 86). The non-locking screws (10) have a thread for engaging bone and a non-threaded head (12). Both the locking and non-locking screws (20; 10) remain seated in their respective holes (36; 56; 86; 38; 58; 88) for substantially as long as the bone plate (30; 50; 80) is implanted. The non-locking screws (10) compress the bone plate (30; 50; 80) against the bone and hold fracture reduction while the locking screws (20) are secured to the plate at a fixed angular relationship. The mixed fixation achieved by this bone plating system and method is particularly useful for treatment of per-articular fractures.

La présente invention concerne un système de plaque vissée et un procédé de fixation d'une fracture osseuse. Ce système de plaque vissée comprend une plaque vissée (30, 50, 80), au moins une vis de verrouillage (20) et au moins une vis de non verrouillage (10). La plaque vissée (30, 50, 80) comporte des trous (36, 56, 86) filetés (40) et des trous de non verrouillage (38, 58, 88). Les vis de verrouillage (20) possèdent des tiges (26) filetées destinées à entrer en prise avec l'os et une tête (22) filetée (24) conçue et dimensionnée afin de s'accoupler avec le filetage (40) des trous de verrouillage (36, 56, 86). Les vis de non verrouillage (10) possèdent un filetage destiné à entrer en prise avec l'os et une tête non filetée (12). Les vis de verrouillage et de non verrouillage (20, 10) restent logées dans leurs trous respectifs (36, 56, 86, 38, 58, 88) pratiquement aussi longtemps que la plaque vissée (30, 50, 80) est implantée. Les vis de non verrouillage (10) compriment la plaque vissée (30, 50, 80) contre l'os et maintiennent la réduction de la fracture, tandis que les vis de verrouillage (20) sont fixées à la plaque avec une orientation angulaire fixée. La fixation mixte réalisée par ce système et ce procédé de plaque vissée est particulièrement utile dans le traitement de fractures péri-articulaires.

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