04863476 is referenced by 829 patents and cites 3 patents.

A apinal implant has an elongate body which is divided into two portions with mutually opposed contact surfaces and is for insertion into the joint space between two adjacent vertebrae. A cam device or cam devices are movable between the contact surfaces to expand or increase the spacing between the body portions so as to increase the spacing between the adjacent vertebrae.

The implant has a porous external surface to facilitate bore and cartilage tissue growth therein. Alternatively, the external surface is smooth and coated with a bioactive material such as a hydroxyapatite, for example, tricalcium phospahte. In both instances bone, cartilage tissue and external surfaces of the implant are fused together to prevent migration of the implant. Advantageously, insertion of the implant requires a minimum incision in skin and cartilage tissue.

Title
Spinal implant
Application Number
7/90610
Publication Number
4863476
Application Date
August 28, 1987
Publication Date
September 5, 1989
Inventor
John A N Shepperd
Hemingfold, Telham, Near Battle, East Sussex
GB
Agent
Ladas & Parry
IPC
A61F 2/44
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