• 1. 华北理工大学(河北唐山, 063000)公共卫生学院;
  • 2. School of Graduate, 3 School of Public Health, North China University of Science and Technology, Tangshan Hebei, 063000, P. R. China;
  • 3. Department of Orthopaedics and Traumatology, the Second Hospital of Tangshan(North China University of Science and Technology Affiliated Orthopedic Hospital);
WUXiaobo, Email: drwuxiaobo@foxmail.com
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Objective To compare the biomechanical difference of 4 kinds of internal fixations for acetabular fracture in quadrilateral area. Methods The transverse fracture models were created in 16 hemipelves specimens from 8 adult males, and were randomly divided into 4 groups according to different internal fixation methods (n=4): infrapectineal buttress reconstruction plate (group A), infrapectineal buttress locking reconstruction plate (group B), reconstruction plate combined with trans-plate quadrilateral screws (group C), and anterior reconstruction plate-lag screw (group D). Then the horizontal displacement, longitudinal displacement of fractures, and axial stiffness were measured and counted to compare the stability after continuous vertical loading. Results Under the same loading, the horizontal and longitudinal displacements of groups A, B, C, and D were decreased gradually; when the loading reached 1 800 N, the longitudinal displacement of group A was more than 3.00 mm, indicating the failure criterion, while the axial stiffness increased gradually. Under 200 N loading, there was no significant difference (P>0.05) in horizontal displacement, longitudinal displacement, and axial stiffness among 4 groups. When the loading reached 600-1 800 N, significant differences were found in horizontal displacement, longitudinal displacement, and axial stiffness among 4 groups (P<0.05) except the horizontal displacement between groups C and D (P>0.05). Conclusion For acetabular fracture in the quadrilateral area, anterior reconstruction plate-lag screw for internal fixation has highest stability, followed by reconstruction plate combined with trans-plate quadrilateral screws, and they are better than infrapectineal buttress reconstruction plate and infrapectineal buttress locking reconstruction plate.

Citation: WANGLei, WUXiaobo, QIWei, WANGYongbin, HEQuanjie, XUFengsong, LIUHongyang. BIOMECHANICAL COMPARATIVE STUDY ON FOUR INTERNAL FIXATIONS FOR ACETABULAR FRACTURES IN QUADRILATERAL AREA. Chinese Journal of Reparative and Reconstructive Surgery, 2015, 29(10): 1235-1239. doi: 10.7507/1002-1892.20150268 Copy

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