Mechanical properties of two canine iliac fracture fixation systems : a thesis /
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| Format: | Thesis Book |
| Language: | English |
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| Abstract: | ABSTRACT: This study compared the mechanical properties of two iliac fracture fixation systems. One system consisted of a 5-hole 3.5 mm bone plate and five 3.5 mm cortical bone screws. The other system consisted of three 4.0 mm cancellous bone screws placed in lag fashion. Forty-six hemipelves harvested from canine cadavers were used for in vitro testing of fixation systems. Mechanical testing was performed on intact hemipelves and on osteotomized hemipelves with implants. The osteotomy was standardized and oblique simulating a common clinical fracture. Forty specimens were tested once to failure (static testing). Ten specimens were tested in torsional loading. Ten specimens were tested in axial loading. Ten specimens were tested in combined axial and moderate bending loading, and ten specimens were tested in axial with severe bending loading. In each testing mode, 4 specimens were intact and 3 were tested with each fixation system. Measurements of stiffness and strength at failure were taken. Six hemipelves were tested in cyclic loading modes to determine fatigue characteristics (dynamic testing). Three specimens with each fixation system were tested. In all static testing modes stiffness and strength at failure values were greater for intact specimens than for implanted specimens. Also, lag screw implanted specimens had greater values of stiffness and strength at failure than plate implanted specimens. Dynamic testing indicated no evidence of failure or difference in serviceability of the two fixation systems after 100,000 cycles. |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Veterinary Medicine and Surgery." "Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of Master of Science August 1988." Approved as to style and content by: Don Hulse, Harry W. Boothe, James K. Nelson, John R. August. |
| Physical Description: | x, 160 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |