Static strength evaluation of sacroiliac fracture-separation repairs.
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.
Radasch
R M
RM
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames.
Merkley
D F
DF
Hoefle
W D
WD
Peterson
J
J
D000818:Animals; D001858:Bone Nails / Q000662:veterinary; D001863:Bone Screws / Q000662:veterinary; D004285:Dogs / Q000293:injuries* / Q000601:surgery; D005593:Fracture Fixation, Internal / Q000662:veterinary*; D012446:Sacroiliac Joint / Q000293:injuries* / Q000601:surgery