Clinical study of stress shielding after mini-plate internal fixation for mandibular fractures

VernacularTitle:下颌骨骨折内固定术后应力遮挡效应的临床研究
Author: Shi-Jun LIU ¹ ; Li-Jun WANG ; Xiao-Ming GU ; Wei WU ; Peng XU ; Zu-Xian CHEN
Author Information

1. 武警总医院
Keywords: Mandibular fractures; Fracture fixation,internal; Stress shielding
From: Chinese Journal of Stomatology 2010;45(8):474-476
CountryChina
Language:Chinese
Abstract: Objective To investigate the stress shielding after mini-plate internal fixation for mandibular fractures. Methods Eighteen patients with mandibular fractures were selected. X-rays were taken before operation and 3,4, 6 months after operation when the plates were removed. The bone density of the mini plate area was examined and compared among different time interval groups. Results The bone density before operation ( 125.41 ± 2. 47 ) and 3 months after operation ( 120. 19 ± 3.52 ) was not significantly different, but became lower 4 and 6 months after operation than before operation. Conclusions There appeared stress shielding after internal fixation for 4 and 6 months in mandibular fracture,and the mini plate should be removed at those times.