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1. WO1997027811 - IMPLANTABLE BONE DISTRACTION DEVICE

Publication Number WO/1997/027811
Publication Date 07.08.1997
International Application No. PCT/US1997/001775
International Filing Date 31.01.1997
Chapter 2 Demand Filed 16.07.1997
IPC
A61B 17/80 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
80Cortical plates
CPC
A61B 17/8009
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
80Cortical plates ; , i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
8004with means for extending or compressing the bone or bones
8009the plate having a ratchet
A61B 17/8071
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
80Cortical plates ; , i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
8061specially adapted for particular bones
8071for the jaw
Applicants
  • THE GENERAL HOSPITAL CORPORATION [US]/[US]
Inventors
  • SELDIN, Edward, B.
Agents
  • LAPPIN, Mark, G.
Priority Data
08/594,15731.01.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) IMPLANTABLE BONE DISTRACTION DEVICE
(FR) DISPOSITIF DE DISTRACTION OSSEUSE IMPLANTABLE
Abstract
(EN)
This invention is an implantable bone distraction device for inducing controlled lengthening of bones at an osteotomy site. The device has two elongated plates (12, 14) which are operatively positioned to be substantially parallel and to overlap partially. Each of the plates (12, 14) includes a portion (24, 34) for affixing the plates to respective bone segments (13, 15). The first plate (12) includes a plurality of parallel sawtooth ridges (36) extending transverse from the long axis (A) of the plate (12). The second plate (14) includes at least one resilient pawl (40) and at least one resilient ratchet arm (44). The pawl (40) and the arm (44) are engageable with the ridges (36) on the first plate (12). The ratchet arm (44) responds to application of force on it by engaging with one of the ridges (36) on the first plate (12) and pushing the first plate (12) away from the second plate (14) in the direction of their common axes (A, B). The first bone segment (13) is thus moved away from the second bone segment (15) in the direction of the common axes (A, B) of the plates (12, 14) in a controlled fashion. Backward movement of the first plate (12) toward the second plate (14) is prevented by abutting engagement of the pawl (40) with one of the ridges (36) on the first plate (12).
(FR)
Cette invention se rapporte à un dispositif de distraction osseuse implantable servant à induire un allongement régulé des os sur un site d'ostéotomie. Ce dispositif comporte deux plaques allongées (12, 14) qui, en mode opérationnel, sont disposées en position essentiellement parallèle et de façon à se chevaucher partiellement. Chacune des plaques (12, 14) comprend une partie (24, 34) servant à fixer lesdites plaques à des segments osseux correspondants (13, 15). La première plaque (12) comporte plusieurs arêtes en dents de scie parallèles (36) s'étendant transversalement à partir de l'axe longitudianal (A) de la plaque (12). La seconde plaque (14) comporte au moins un cliquet élastique (40) et au moins une languette d'encliquetage élastique (44). Le cliquet (40) et la languette (44) peuvent s'engager dans les arêtes (36) de la première plaque (12). Lors de l'application d'une force sur la languette encliquetable (44), celle-ci réagit en s'engageant dans l'une des arêtes (36) de la première plaque (12) et en poussant cette première plaque (12) de façon à l'éloigner de la seconde plaque (14) dans la direction de leurs axes communs (A, B). Le premier segement osseux (13) est ainsi éloigné du second segment osseux (14) dans la direction des axes communs (A, B) des plaques (12, 14) de façon régulée. Tout mouvement de recul de la première plaque (12) en direction de la seconde plaque (14) est empêché par l'engagement en butée du cliquet (40) contre l'une des arêtes (36) de la première plaque (12).
Also published as
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