EP0290138A2
Expired / Lapsed
EP
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Method of manufacturing of anatomical precontoured plates
Assignee: POLLOCK, RICHARD ALLISON
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Filing: 1988-04-06
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Granted: —
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Expires: 2008-04-06
Abstract
Abstract Precontoured plating, screws, instruments and methods for osteosynthesis. Plates (10-50) according to the present invention take advantage of the fact that human adult craniofacial structure and shape is highly similar among the population. The plates (10-50) are thus preformed, pretempered, precontoured, and preconfigured during manufacture to fit a large proportion of the human adult population. The plates (10-50) consequently require less time during surgery to twist and bend to conform to the skeletal structure and their crystalline and other structural characteristics need not be adversely affected by extensive bending, twisting and shaping in the operating room. The plates (10-50) may be packaged and presented for use on forms which simulate portions of the skull so that their intended craniofacial location is easily recognised by members of the surgical team. Because bone thickness at particular craniofacial skeletal locations is highly consistent in the adult population, appropriate length screws (68) may also be packaged with the plates with which they are to be used, as for instance, by insertion through the plates on the skeletal-shaped packaging form. The packaging also allows the plates to be presterilized to save time which would otherwise be used for sterilizing the plates. Screws (68), screw transport units (78,80) and starters (82, 102, 106) and dispensers (120) for the plates and screws are also disclosed.
Inventors
- 👤 Richard Allison Pollock
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 03:29
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/80; A61B17/8085; A61B17/16; A61B17/17; A61B17/1735; A61B50/00; A61B50/30; A61B17/88; A61B17/8875; A61B17/8877; A61B17/888; A61B17/8886; A61B17/8888; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/2875
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
61 words
An osteosynthesis plate comprising an elongated section which has (1) an arcuate cross section to provide a convex top face and a concave bottom face and (2) a plurality of fastener openings between the top and bottom faces and which is shaped during manufacture to conform in three dimensions to the portion of the skeleton to which it will be attached.
Claim 2
Dependent Claim
61 words
An osteosynthesis plate comprising an elongated section which has (1) an arcuate cross section to provide a convex top face and a concave bottom face and (2) a plurality of fastener openings between the top and bottom faces and which is shaped during manufacture to conform in three dimensions to the portion of the skeleton to which it will be attached.
Claim 3
Dependent Claim
37 words
An osteosynthesis plate according to claim 1, in which the elongated section comprises a plurality of segments, each of which may be penetrated by a fastener opening, and a plurality of throat sections, each connecting two segments.
Claim 4
Dependent Claim
35 words
An osteosynthesis plate according to claim 1 or 2, and which has a substantially constant polar moment of inertia in its cross-sectional dimension in order to provide substantially uniform resistance over its length to torsion.
Claim 5
Dependent Claim
37 words
An osteosynthesis plate according to any of claims 1 to 3, and which has a substantially constant moment of inertia in the cross-sectional dimension in order to provide substantially uniform resistance to bending in the contour dimension.
Claim 6
Dependent Claim
32 words
An osteosynthesis plate according to any of the preceding claims, in which the plate is composed of a material selected from titanium, vitallium, stainless steel, a non-metallic material, and a resorbable material.
Claim 7
Dependent Claim
223 words
An osteosynthesis plate according to any of the preceding claims, in which the plate is shaped during manufacture to conform to the shape of one of the following:- the human upper forehead the human skeleton for glabellar osteosynthesis the human skeleton for panskull osteosynthesis the human skeleton for nasofrontal suspension and osteosynthesis the human skeleton for medial canthal osteosynthesis the human skeleton for frontozygomatic osteosynthesis the human skeleton for inferior orbital rim osteosynthesis the human skeleton for lateral buttress osteosynthesis the human skeleton for zygomatic arch osteosynthesis the human skeleton for medial buttress osteosynthesis, and to be generally T-shaped the human skeleton for medial buttress osteosynthesis and to be generally J-shaped the human skeleton for split palate osteosynthesis the human skeleton for maxillary osteosynthesis and to be generally L-shaped the human skeleton for upper symphysis osteosynthesis the human skeleton for marginal symphysis osteosynthesis the human skeleton for mandibular anterior body osteosynthesis the human skeleton for mandibular anterior body and marginal symphysis osteosynthesis the human skeleton for mandibular angle osteosynthesis the human skeleton for mandibular ridge osteosynthesis the human skeleton for mandibular posterior body osteosynthesis the human skeleton for mandibular posterior body and mandibular angle osteosynthesis to conform to and span the ramus to the contralateral parasymphysis to conform to and span the condyle to the contralateral parasymphysis and incorporate a prosthetic condylar head.
Claim 8
Dependent Claim
42 words
A bone stabilisation device comprising an osteosynthesis plate and a plurality of screws penetrating the plate for screwing the plate to bone, in which each screw has a head with a square recess for receiving and cooperating with a square headed screwdriver.
Claim 9
Dependent Claim
42 words
A bone stabilisation device comprising an osteosynthesis plate and a plurality of screws penetrating the plate for screwing the plate to bone, in which each screw has a head with a square recess for receiving and cooperating with a square headed screwdriver.
Claim 10
Dependent Claim
21 words
A bone stabilisation device according to claim 7, in which the screws are made of the same material as the plate.
Claim 11
Dependent Claim
91 words
A container for osteosynthesis plates and screws, comprising: a. a plurality of container walls forming the sides and bottom of the container b. a presentation face attached to the container walls shaped to simulate the portion of the skeleton to which the plates and screws in the container will be attached and to hold the plates and the screws in place on the face in a position corresponding to their intended position on the skeleton; and c. a cover removably attached to the container walls for accessing the plates and screws.
Claim 12
Dependent Claim
91 words
A container for osteosynthesis plates and screws, comprising: a. a plurality of container walls forming the sides and bottom of the container b. a presentation face attached to the container walls shaped to simulate the portion of the skeleton to which the plates and screws in the container will be attached and to hold the plates and the screws in place on the face in a position corresponding to their intended position on the skeleton; and c. a cover removably attached to the container walls for accessing the plates and screws.
Claim 13
Dependent Claim
141 words
A container according to claim 9, which is configured to package one of the following:- a frontal sinus fracture set of plates and screws a frontal sinus with nasofrontal separation set of plates and screws a right zygomatic set of plates and screws a left zygomatic set of plates and screws a right complex zygomatic set of plates and screws a left complex zygomatic set of plates and screws a Lefort maxillary set of plates and screws a maxillary with split palate set of plates and screws a right mandibular symphysis/body set of plates and screws a left mandibular symphysis/body set of plates and screws a right mandibular angle/body set of plates and screws a left mandibular angle/body set of plates and screws a right mandibular comminuted/complex set of plates and screws a left mandibular comminuted/complex set of plates and screws
Claim 14
Dependent Claim
71 words
A container for osteosynthesis plates and screws comprising:- a. a plurality of container walls forming the body of the container b. mounting means in the body for holding and presenting at least one osteosynthesis plate and at least one screw; and c. a cover removably sealed in a fluid-tight relationship with the body to allow the contents of the container to be sterilized and remain sterilized until the seal is broken.
Claim 15
Dependent Claim
71 words
A container for osteosynthesis plates and screws comprising:- a. a plurality of container walls forming the body of the container b. mounting means in the body for holding and presenting at least one osteosynthesis plate and at least one screw; and c. a cover removably sealed in a fluid-tight relationship with the body to allow the contents of the container to be sterilized and remain sterilized until the seal is broken.
Claim 16
Dependent Claim
82 words
A screw starter for square-headed screws, comprising: 1. a shaft 2. a handle attached to the shaft 3. a head attached to the end of the shaft opposite the handle, comprising:- a. a cavity for receiving the head of the screw to be started b. a square shaped protrusion in the cavity aligned coaxially with the shaft for insertion into the head of the screw; and c. a friction means connected to the cavity interior for retaining the screw in the cavity.
Claim 17
Dependent Claim
82 words
A screw starter for square-headed screws, comprising: 1. a shaft 2. a handle attached to the shaft 3. a head attached to the end of the shaft opposite the handle, comprising:- a. a cavity for receiving the head of the screw to be started b. a square shaped protrusion in the cavity aligned coaxially with the shaft for insertion into the head of the screw; and c. a friction means connected to the cavity interior for retaining the screw in the cavity.
Claim 18
Dependent Claim
58 words
A screw starter, comprising: a. a shortened cylindrical body forming a generally circular top and bottom connected by a cylindrical side wall b. an opening extending between the top and bottom c. a countersink formed in the top and aligned coaxially with the opening; and d. a tab attached to the side wall for grasping the screw starter.
Claim 19
Dependent Claim
58 words
A screw starter, comprising: a. a shortened cylindrical body forming a generally circular top and bottom connected by a cylindrical side wall b. an opening extending between the top and bottom c. a countersink formed in the top and aligned coaxially with the opening; and d. a tab attached to the side wall for grasping the screw starter.
Claim 20
Dependent Claim
48 words
A screw starter according to claim 13, and formed of a plastic material and further comprising a fault formed in the side wall to allow the screw starter to fail and be removed from the screw when the screw is forced against the countersink by a predetermined force.
Claim 21
Dependent Claim
88 words
A surgical parts dispenser comprising:- a. circular floor wall b. a cylindrical side wall whose bottom is connected to the floor wall c. a pedestal connected to the centre of the floor wall d. a plurality of section walls, each extending radially from the pedestal to the side wall to form a plurality of container sections e. a circular cover rotatably attached to the pedestal and containing an opening corresponding in shape to a container section; and f. mounting means for mounting the dispenser on a mounting surface
Claim 22
Dependent Claim
88 words
A surgical parts dispenser comprising:- a. circular floor wall b. a cylindrical side wall whose bottom is connected to the floor wall c. a pedestal connected to the centre of the floor wall d. a plurality of section walls, each extending radially from the pedestal to the side wall to form a plurality of container sections e. a circular cover rotatably attached to the pedestal and containing an opening corresponding in shape to a container section; and f. mounting means for mounting the dispenser on a mounting surface
References Cited (Backward Citations)
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