Static Strength Evaluation of Sacroiliac Fracture-Separation Repairs |
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Authors: | ROBERT M RADASCH DVM MS DAVID F MERKLEY DVM MS DiplomateACVs WILLIAM D HOEFLE DVM MS DiplomateACVs JACK PETERSON BS MS |
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Institution: | Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames. |
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Abstract: | The relative static strengths of seven fixation configurations for the repair of sacroiliac fracture-separations were determined. The fixation techniques were two 3.5 mm screws, one 4.5 mm screw, one 4.5 mm screw and a pin, two 4.5 mm screws, one 6.5 mm screw, one 6.5 mm screw and a pin, and two 6.5 mm screws. Each configuration was subjected to a torsional, a bending, and a shear disruptive force while the maximum load tolerated before failure was measured. Two screws were stronger than a single screw of similar size, two small screws were stronger than a single larger screw, and a reduction pin added no significant strength to a single screw repair. It was concluded that use of the largest screws possible will maximize the strength of a sacroiliac fracture-separation repair. |
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