Artificial disc prosthesis

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(12) United States Patent

Navarro et al.

(io) Patent No.: (45) Date of Patent:

US 7,771,480 B2 Aug. 10, 2010

ARTIFICIAL DISC PROSTHESIS

Inventors: Richard R. Navarro, Strongsville, OH (US); Bharadwaj Ananthan, Akron, OH (US); Randall R. Theken, Coventry Township, OH (US)

Assignee: Theken Spine, LLC, Akron, OH (US)

Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 141 days.

Appl.No.: 11/361,880

Filed: Feb. 24, 2006

Prior Publication Data

US 2006/0149377 Al Jul. 6, 2006

Related U.S. Application Data

Continuation of application No. 10/552,094, filed as application No. PCT/US2004/10000 on Apr. 2, 2004.

Provisional application No. 60/460,613, filed on Apr. 4, 2003.

Int. CI.

A61F 2/44 (2006.01)

U.S. CI 623/17.15; 623/17.11

Field of Classification Search 606/61;

623/17.11-17.16 See application file for complete search history.

References Cited

U.S. PATENT DOCUMENTS

(Continued)
FOREIGN PATENT DOCUMENTS
EP 0747025 12/1996

(Continued)

OTHER PUBLICATIONS

Charles Elwood Carlson, Measurement of Pressure Distribution on the Human Hip Joint, Thesis submitted in partial fulfillment of the requirements for the Degree of Master of Science, May 1967, pp. i-vi and 1-49, Charles Elwood Carlson, U.S.A.

(Continued)

Primary Examiner—Eduardo C Robert

Assistant Examiner—Julianna N Harvey

(74) Attorney, Agent, or Firm—Middleton Reutlinger; Robert

H. Eichenberger; Eric L. Killmeier

A visco-elastic motion-limiting artificial intervertebral disc prosthesis is provided that mimics the physiologic function of a normal spinal disc. The disc comprises upper and lower endplates having therewithin channels or openings for optionally receiving one or more motion-limiting members fitted on each end with an enlarged portion. One or more compression stops is provided between the upper and lower endplates. Additionally, an elastomeric cushion is disposed between the endplates and surrounds the motion-limiting members. Also, force transducers and microelectronics can be utilized to provide data to the surgeon or the patient regarding the load state of the disc.

11 Claims, 30 Drawing Sheets

Page 3

OTHER PUBLICATIONS

Charles E. Carlson, An Instrumented Prosthesis for Measuring the Cartilage Surface Pressure Distribution in the Human Hip, Thesis submitted in partial fulfillment of the requirements for the Degree of Doctor of Science, May 5, 1972, pp. 1-185, Charles E. Carlson, U.S.A.

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* cited by examiner