Oblong acetabular component instrumentation
First Claim
1. A reaming system for forming a second cavity in relation to a first cavity, comprising:
- an elongate handle having a proximal end and a distal end;
a bearing plate having a first portion coupled to the handle and a second portion, the bearing plate further including a proximal surface and a distal surface;
at least one locator member removably and replaceably mountable to the bearing plate;
an elongate drive member coupled to the second portion of the bearing plate, the drive member having a distal reamer mating end and a proximal end for coupling with a drive mechanism to rotate the drive member, the distal reamer mating end being axially movable toward and away from the distal surface of the bearing plate; and
a mounting plate disposed at the distal end of the drive member, the mounting plate being matable with the reamer.
2 Assignments
0 Petitions
Accused Products
Abstract
A system for reaming a cavity in bone for implantation of a prosthetic component, such as an oblong acetabular cup having an outer surface formed by adjacent hemispheres. In one embodiment, the reaming system is useful to form a second cavity in relation to an already formed first cavity. The reaming system includes an instrument with an elongate handle and a drive member coupled to a bearing plate with a locator member removably and replaceably mountable to the bearing plate. The drive member has a distal reamer mating end and a proximal end for coupling with a drill mechanism. The distal reamer mating end is axially movable toward and away from the bearing plate to ream the cavity corresponding to the secondary hemisphere of the acetabular cup to be implanted. In another embodiment, the reaming system includes a plurality of reamers each having different outer dimensions and being matable to the drive member. In a further embodiment, the system includes a plurality of locator members for positioning a respective one of the reamers to form the second cavity at a desired location.
222 Citations
30 Claims
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1. A reaming system for forming a second cavity in relation to a first cavity, comprising:
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an elongate handle having a proximal end and a distal end; a bearing plate having a first portion coupled to the handle and a second portion, the bearing plate further including a proximal surface and a distal surface; at least one locator member removably and replaceably mountable to the bearing plate; an elongate drive member coupled to the second portion of the bearing plate, the drive member having a distal reamer mating end and a proximal end for coupling with a drive mechanism to rotate the drive member, the distal reamer mating end being axially movable toward and away from the distal surface of the bearing plate; and a mounting plate disposed at the distal end of the drive member, the mounting plate being matable with the reamer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A reaming system for forming a second cavity in relation to an already formed first cavity, comprising:
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an elongate drive member having a proximal end for coupling with a drive mechanism and a distal end having a mounting plate, the mounting plate being matable with each of a plurality of reamers for forming the second cavity, wherein each reamer forms a different sized cavity; a bearing plate having proximal and distal surfaces with an aperture extending therebetween, the bearing plate further including first and second portions angled with respect to each other, wherein a portion of the drive member is secured within the bore to position the drive member with respect to the bearing plate; a handle having a proximal end for manipulation by a user and a distal end secured to the bearing plate; and at least one locator member selectively matable to the second portion of the bearing plate, the locator member providing a reference point for positioning the reamer in relation to the first cavity. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification