[A biomechanical evaluation of the sacroiliac anatomy type bar-plate internal fixation system].
OBJECTIVE
To evaluate the biomechanical personality of the sacroiliac anatomy type Bar-plate system (SABP), which was of fixation usage to the fracture or dislocation of the sacroliliac joint.


METHODS
Twenty fresh and freeze cadaver pelvises were prepared with pelvic fracture model,compared with different internal fixation systems such as Galveston technique, transiliac rod fixation, reconstruction plate and sacroiliac joint screws using experimental stress analysis methods,and then the stability of the pelvic was obtained and evaluated.


RESULTS
Using new SABP system to treat pelvic sacroiliac joint fracture and dislocation was higher 10%, 11%, 16%, 21% in the strength; more 12%, 14%, 21%, 31% in rigidity; less 13%, 14%, 22%, 25% in straining;less 10%, 12%, 16%, 20% in shifting than the Galveston technique, transiliac rod fixation, reconstruction plate and sacroiliac joint screws, with remarkable statistic difference (P < 0.05), and it was even better than cadaver pelvis.


CONCLUSIONS
To treat pelvic facture, the fixation with new SABP system is of better strength, rigidity and stability, and the SABP system is an ideal new application.
Zheng
Qi
Q
Department of Orthopaedic, Red A cross Hospital, Hangzhou 310003, Zhejiang, China. drzhq007@sohu.com
Bi
Da-wei
DW
Shi
Shi-yuan
SY
Fei
Jun
J
Wei
Wei
W
Zu
Gang
G
Wang
Yi-fan
YF
Wang
Yi-jin
YJ
D000328:Adult; D001696:Biomechanical Phenomena; D001860:Bone Plates; D050723:Fractures, Bone / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D016268:Internal Fixators; D004204:Joint Dislocations / Q000503:physiopathology / Q000601:surgery*; D008875:Middle Aged; D012446:Sacroiliac Joint / Q000293:injuries* / Q000601:surgery*