KRIER, Brice,VIRGAUX, Nicolas,SAUVAGE, Bruno,VIART, Guy,ROKEGEM, Pascal,CLEVENNA, Andrew
申请号：
EP16806265.1
公开号：
EP3376982A1
申请日:
2016.11.08
申请国别(地区):
EP
年份:
2018
代理人:
摘要：
The invention relates to a non-continuous dual-thread bone screw (1) comprising a drive head (2) extended by an anchoring body (3) consisting of a conical-cylindrical core (4) on which at least two conical-cylindrical threads (5, 6) extend that anchor said screw (1) into bone, the anchoring body (3) including over the entire length thereof and from the drive head (2) anchoring portions of different profiles that provide anchoring corresponding to the different hardness and strength levels of the bone, said anchoring body (3) comprising below the drive head (2) a first anchoring portion (7) consisting of a conical core (4a) and two threads (5, 6) of cylindrical profile and identical pitch, a second anchoring portion (8) made up of a cylindrical core (4b) and a single cylindrical thread (5) along one-quarter turn, a third anchoring portion (9) having a cylindrical core (4b) and two threads (5, 6) of cylindrical profile along one-half turn, a fourth anchoring portion (10) including a cylindrical core (4b) and a single thread (6) of cylindrical profile along n turns depending on the overall length of the bone screw (1), a fifth anchoring portion (11) comprising a conical core (4a) and two threads (5, 6) of conical profile that form the tip of the bone screw.La vis osseuse (1) à double filet discontinu suivant la présente invention comporte une tête d'entraînement (2) se prolongeant par un corps d'ancrage (3) constitué d'une âme cylindro-conique (4) sur laquelle s'étendent au moins deux filets cylindro-coniques (5, 6) assurant l'ancrage osseux de ladite vis (1), le corps d'ancrage (3) comprenant sur toute sa longueur et à partir de la tête d'entraînement (2) des parties d'ancrage de profils différents assurant un ancrage correspondant aux différentes duretés et résistances de l'os, ledit corps d'ancrage (3) comportant en dessous de la tête d'entraînement (2) une première partie d'ancrage (7) constituée d'une âme conique (4a) et deux filets (5, 6) à profil cylindrique et
