Title:
【発明の名称】脊椎骨間円板用人工器官
Document Type and Number:
Japanese Patent JP3017371
Kind Code:
B2
Abstract:
Intervertebral disc endoprosthesis having two prosthesis plates (1, 2) to be connected with the end plates of the associated vertebral bodies, and a prosthetic core (3) interacting with at least one prosthesis plate via an articular surface (6) permitting a rotary movement about the upward axis. In order to permit a rotary movement about the upward axis (9) while at the same time opposing this movement with a resistance, the articular surface forms curvatures of different mean radius in the median section and in the frontal section. The radius of curvature in the sagittal section is expediently smaller than that in the frontal section. In order to avoid excessive twisting, stops may be provided on the prosthesis plates and the prosthesis core. These are designed, for example, as ribs and grooves extending in the median plane.
Inventors:
Karin Buttner-Yants
Jean-Philippe Lemer
Arnold Keller
Jean-Philippe Lemer
Arnold Keller
Application Number:
JP5207093A
Publication Date:
March 06, 2000
Filing Date:
March 12, 1993
Export Citation:
Assignee:
Valdemar Link Gesellschaft Mitt Beschlenktel Haftung und Company
International Classes:
A61F2/44; A61F2/00; A61F2/30; (IPC1-7): A61F2/44
Domestic Patent References:
| JP61122859A | ||||
| JP1136655A | ||||
| JP4505574A |
Other References:
【文献】西独国特許出願公開2804936(DE,A1)
【文献】西独国特許出願公開3023353(DE,A1)
【文献】西独国特許出願公開3023353(DE,A1)
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)