Biomechanical research on anterior double-plate fixation for vertically unstable sacroiliac dislocations.
OBJECTIVE
To determine the best method for anterior internal fixation by comparing the biomechanical characteristics of various anterior fixation methods for vertically unstable sacroiliac dislocations.


METHODS
Eight pelves with Tile C fracture with vertical loading were measured separately. Three- and two-hole anterior double plates were fixed at different angles and compared with sacroiliac screws.


RESULTS
For two-hole anterior double plates, with increasing angle, axial stability increases while lateral stability decreases. For three-hole plates with an angle of 60°, axial stability is clearly better when placed horizontally, while lateral stability shows no obvious differences.


CONCLUSIONS
For fixing sacroiliac dislocations, three-hole anterior double plates placed at about 60° produce excellent stability, which would be greatly increased if screws were added on the iliac side.
Department of Orthopaedics, Second Affiliated Hospital, Medical College of Zhejiang University, Hangzhou, China.
Wu
W
Chen
Zhi-jun
ZJ
Pan
Jian-song
JS
Chen
D000328:Adult; D001696:Biomechanical Phenomena; D001860:Bone Plates; D001863:Bone Screws; D002102:Cadaver; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D050723:Fractures, Bone / Q000150:complications / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D007085:Ilium / Q000293:injuries* / Q000601:surgery; D004204:Joint Dislocations / Q000209:etiology / Q000503:physiopathology* / Q000601:surgery; D010384:Pelvic Bones / Q000293:injuries* / Q000601:surgery; D011474:Prosthesis Design; D012446:Sacroiliac Joint / Q000293:injuries / Q000503:physiopathology* / Q000601:surgery