Document Type


Date of Award

Fall 10-31-1994

Degree Name

Master of Science in Biomedical Engineering - (M.S.)


Biomedical Engineering Committee

First Advisor

Clarence W. Mayott

Second Advisor

J. Russell Parsons

Third Advisor

Mark Zimmerman


The purpose of this study is to prove the effectiveness of the newly designed and patented Cervical Spine Bone Anchoring System (CSBAS). It is a posterior fixation device intended to be used with spine bone-plate systems. Its purposes are to substitute for conventional bone screws, significantly decrease the neurological and vascular risks associated with screws, and have comparable bone purchase strength.

Three CSBAS sizes (10mm, 12mm, and 14mm) were compared to four conventional bone screws in six human cadaveric cervical spines (C2-C7). Post-implantation axial pullout tests of each device using an MTS servohydraulic testing machine yielded bone purchase strength.

In conclusion, analysis of test results shows that in the majority of cases the CSBAS is statistically comparable in bone purchase strength to the four typical bone screws. It is also clinically safer than screws as the CSBAS device does not encroach upon vital neural and vascular structures.



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