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1. WO1997029708 - BONE FASTENER AND INSTRUMENT FOR INSERTION THEREOF

Publication Number WO/1997/029708
Publication Date 21.08.1997
International Application No. PCT/US1997/001398
International Filing Date 07.02.1997
Chapter 2 Demand Filed 11.09.1997
IPC
A61B 17/68 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
17Surgical instruments, devices or methods, e.g. tourniquets
56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
58for osteosynthesis, e.g. bone plates, screws or the like
68Internal fixation devices
CPC
A61B 17/688
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
17Surgical instruments, devices or methods, e.g. tourniquets
56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
58for osteosynthesis, e.g. bone plates, screws, ; setting implements; or the like
68Internal fixation devices ; , including fasteners and spinal fixators, even if a part thereof projects from the skin
688for reattaching pieces of the skull
A61B 17/8888
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
17Surgical instruments, devices or methods, e.g. tourniquets
56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
58for osteosynthesis, e.g. bone plates, screws, ; setting implements; or the like
88Osteosynthesis instruments;; Methods or means for implanting or extracting internal ; or external; fixation devices
8875Screwdrivers, spanners or wrenches
8886holding the screw head
8888at its central region
A61F 2/2875
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
2Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
02Prostheses implantable into the body
28Bones
2875Skull or cranium
Y10S 606/907
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
606Surgery
907Composed of particular material or coated
Y10S 606/908
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
606Surgery
907Composed of particular material or coated
908Bioabsorbable material
Applicants
  • WALTER LORENZ SURGICAL, INC. [US]/[US]
Inventors
  • SEVRAIN, Lionel, C.
  • SEVRAIN, Christophe, J.-P.
Agents
  • SMIRMAN, Preston, H.
Priority Data
08/635,41026.04.1996US
60/011,64714.02.1996US
60/014,04825.03.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) BONE FASTENER AND INSTRUMENT FOR INSERTION THEREOF
(FR) DISPOSITIF DE FIXATION POUR OS ET SON INSTRUMENT D'INSERTION
Abstract
(EN)
This invention is a bone fastener (10) for closing a craniotomy including a cap (60) and a base (38) interconnected by a narrow cylindrical collar (46). The cap has an externally threaded stud (68) that screws into an internally threaded bore (48) of the collar, thereby allowing the cap and base to be brought into clamping engagement against the internal and external faces of a bone plate and surrounding bone. In a particularly disclosed embodiment, the base of the fastener is placed below a craniotomy hole (12) with the collar projecting into the hole, and the stud of the cap is screwed into the bore of the base from above the hole to clamp a bone flap (20) against the surrounding cranium (26). The fastener is adaptable for use in several regions of the skull having various thicknesses. An insertion tool (80) with a long handle (84) permits placement of the base between the brain and the internal face of the bone plate.
(FR)
Ce dispositif de fixation (10) pour os permet d'obturer une craniotomie et comprend une partie supérieure (60) et une base (38) reliées par un collier cylindrique étroit (46). La partie supérieure présente une tige (68) à filetage externe qui se visse dans l'âme (48) à filetage interne du collier, ce qui permet à la partie supérieure et à la base d'entrer en prise par serrage contre les faces internes et externes d'une plaque osseuse et l'os environnant. Dans une variante décrite, la base de ce dispositif d'attache est placée sous un orifice (12) de craniotomie, le collier faisant saillie dans l'orifice, et la tige de la partie supérieure est vissée dans l'âme de la base depuis le haut de l'orifice pour serrer un volet osseux (20) contre le crâne environnant (26). Ce dispositif d'attache est réglable, ce qui permet de l'utiliser dans plusieurs régions crâniennes à épaisseurs variables. Un instrument d'insertion (80), doté d'un long manche (84), permet de positionner la base entre le cerveau et la face interne de la plaque osseuse.
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