Metacarpal bone reconstruction plate single-segment fixation in the repair of atlas fracture:biomechanical analysis of in vitro three-dimensional motion / 中国组织工程研究

ABSTRACT

BACKGROUND:To achieve the stability of the fracture reduction and try to keep the integrity of the cervical vertebra activity, domestic and foreign scholars have carried out the clinical and experimental research on the limited internal fixation of single segment, and achieved good clinical curative effect. There was no obvious discomfort symptoms caused by the instability of the atlantoaxial joint. OBJECTIVE:To perform biomechanical analysis of fixed atlas fractures by single phase with three-dimensional motion experiment. METHODS:Six fresh upper cervical spine specimens (C0-C5) were used, and made into models of double fracture of the anterior arch of the atlas. Single segment fixation was conducted with metacarpal bone reconstruction plate system simulation. Data of each specimen in intact state, fracture state and internal fixation state were measured. The neutral zones in fracture state, internal fixation state and intact state were compared, and the difference of three-dimensional motion range and intact state were compared. RESULTS AND CONCLUSION:(1) There was statistical y significant difference between the neutral zones and range of motion with those of fracture status and intact status (al P0.05). (2) Results verify that simulation of single-segment fixation of unstable atlas fractures with metacarpal bone reconstruction plate system can obtain good stability, restore the stability of the upper cervical spine, and simultaneously ful y avoid adverse effects of fusion.