Osteosynthesis plate system

Details Osteosynthesis plate system Osteosynthesis plate system

1995-06-06

1997-04-01

Hafer, Robert A.

Surgery

Instruments

Orthopedic instrumentation

606 69, A61B 1770, A61B 1780

Patent

active

056161441

ABSTRACT:
An osteosynthesis plate system is particularly well adapted to securely fuse adjacent cervical vertebrae. The plates are for mounting upon the anterior or posterior surfaces of the vertebrae. Plates for mounting on the anterior vertebral surfaces have a concave bone contacting surface and a bone screw locking mechanism integral with each screw hole. Moreover, the bone contacting surface of the plate has a plurality of bone penetrating protrusions to more securely affix the plate to bone. Plates for mounting on the posterior vertebral surfaces also have bone penetrating protections on their bone contacting surfaces. Such plates are formed so as to have a curved bone contacting surface that is concave in the transverse axis of the plate and convex in the longitudinal axis of the plate. The screw holes of such plates are constructed so as to guide a bone screw along a desired angle to improve the anchoring of the screws in bone.

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Page 1/2 and 2/2--sheets of drawings from Canadian Patent #1112803.
"Techniques of Screw Fixation of the Cervical Spine", Dickman et al., BNI Quarterly 8:2 (Spring 1992), pp. 9-26.
"Anatomic and Biomechanical Study of Posterior Cervical Spine Plate Arthrodesis: An Evaluation of Two Different Techniques of Screw Placement", Montesano et al., J. Spinal Disorders 5:3 (1992), pp. 301-305.
"Lateral Mass Posterior Plating and Facet Fusion for Cervical Spinal Instability", Cherny, et al., BNI Quarterly 7:2 (Spring 1991), pp. 2-11.

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