DOUBLE-THREADED BONE SCREW

A discontinuously double-threaded bone screw includes a drive head and anchoring body consisting of a cylindro-conical core over which extend at least two cylindro-conical threads, the anchoring body including anchoring portions of different profiles, ensuring an anchoring corresponding to different...

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Bibliographische Detailangaben
Hauptverfasser:	VIART Guy, SAUVAGE Bruno, KRIER Brice, VIRGAUX Nicolas, CLAVENNA Andrew, ROKEGEM Pascal
Format:	Patent
Sprache:	eng
Schlagworte:	DIAGNOSIS HUMAN NECESSITIES HYGIENE IDENTIFICATION MEDICAL OR VETERINARY SCIENCE SURGERY
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	A discontinuously double-threaded bone screw includes a drive head and anchoring body consisting of a cylindro-conical core over which extend at least two cylindro-conical threads, the anchoring body including anchoring portions of different profiles, ensuring an anchoring corresponding to different bone hardnesses and strengths, the anchoring body including, below the drive head, a first anchoring portion with a conical core and two threads with cylindrical profile and identical pitch, a second anchoring portion with a cylindrical core and a single cylindrical thread over ¼ turn, a third anchoring portion with a cylindrical core and two threads with cylindrical profile over ½ turn, a fourth anchoring portion including a cylindrical core and a single thread with cylindrical profile over n turn based on total length of the bone screw, and a fifth anchoring portion including a conical core and two threads with conical profile forming the tip of the bone screw.