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1. (WO1988003781) OSTEOSYNTHETIC DEVICE
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1988/003781 International Application No.: PCT/CH1987/000158
Publication Date: 02.06.1988 International Filing Date: 25.11.1987
IPC:
A61B 17/80 (2006.01) ,A61B 17/86 (2006.01) ,A61B 17/70 (2006.01) ,A61F 2/30 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
17
Surgical instruments, devices or methods, e.g. tourniquets
56
Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
58
for osteosynthesis, e.g. bone plates, screws or the like
68
Internal fixation devices
80
Cortical plates
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
17
Surgical instruments, devices or methods, e.g. tourniquets
56
Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
58
for osteosynthesis, e.g. bone plates, screws or the like
68
Internal fixation devices
84
Fasteners therefor
86
Pins or screws
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
17
Surgical instruments, devices or methods, e.g. tourniquets
56
Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
58
for osteosynthesis, e.g. bone plates, screws or the like
68
Internal fixation devices
70
Spinal positioners or stabilisers
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
F
FILTERS 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
2
Filters 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
02
Prostheses implantable into the body
30
Joints
Applicants:
RAVEH, Joram [CH/CH]; CH (UsOnly)
SUTTER, Franz [CH/CH]; CH (UsOnly)
SYNTHES AG [CH/CH]; Grabenstrasse 15 CH-7002 Chur, CH (AllExceptUS)
Inventors:
RAVEH, Joram; CH
SUTTER, Franz; CH
Agent:
LUSUARDI, Werther; Stockerstrasse 8 CH-8002 Zürich, CH
Priority Data:
353/87-002.02.1987CH
4707/86-025.11.1986CH
Title (EN) OSTEOSYNTHETIC DEVICE
(FR) DISPOSITIF D'OSTEOSYNTHESE
Abstract:
(EN) Internal fixing device for osteosynthesis, in which the bone screws (3) are connected in a rigid and functionally stable manner with a pure titanium osteosynthesis plate (1). The walls (8) of the bore holes (2) have a narrower cross-section (5) in at least the lower of the areas which adjoin the bone contact surfaces (4), forming a stop (6) for the head (7) of the bone screw (3). The head (7) of the bone screw (3), provided with longitudinal grooves (10) and a bore (25), is connected with the osteosynthesis plate (1) with optimum rigidity and functional stability by fitting an adjusting screw (11), by means of which the spherical upper surface of the screw head (7) and the wall of the bore (8) permit a measure of axial alignment of the bone screws (3), so that precision requirements imposed on the angle of the bores for the bone screws (3) are less stringent, due to the rotatability of the screw head (7). Those surfaces of the internal fixing destined for contact with the bone (4) are preferably provided with a bio-inert, porous layer (16) to promote growth in the bone. Application of the internal fixing, besides in osteosynthesis proper, in the fixing of implants, particularly of articulatory endoprostheses, for example prostheses of the jaw, hip or vertebrae.
(FR) Dans ce fixateur interne pour l'ostéosynthèse, les vis (3) peuvent être fixées de façon rigide et stable à une plaque de titane pur (1). Les parois d'alésage (8) des trous de vis (2) présentent dans au moins une zone voisine de la surface de contact (4) avec l'os une diminution (5) de la section, qui sert de butée (6) à la tête (7) de la vis (3). Cette tête (7) pourvue d'une fente longitudinale (10) et d'un alésage (25) peut être amenée en contact intime avec la plaque d'ostéosynthèse (1) en vissant un écarteur (11) dans la tête (7). La surface sphérique de la tête (7) et de l'alésage (8) permet un certain ajustement axial des vis (3) de façon que les exigences quant à la précision de l'alésage soient moins élevées. Les surfaces du fixateur interne, qui entrent en contact avec l'os (4), sont pourvues, de préférence, d'une couche poreuse (16) pour favoriser la croissance de l'os. Application de ce fixateur interne, outre pour l'ostéosynthèse proprement dite, pour la fixation d'implants, notamment d'endoprothèses articulatoires, par exemple de la mâchoire, de la hanche ou des vertèbres.
Designated States: JP, US
European Patent Office (EPO) (AT, BE, CH, DE, FR, GB, IT, LU, NL, SE)
Publication Language: German (DE)
Filing Language: German (DE)