Wu Wei, Zhou Jiang, Xu Chong-Tao, Zhang Jie, Jin Yan-Jiao, Sun Geng-Lin
Department of stomatology, Tianjin medical university general hospital, Tianjin, China.
Dent Traumatol. 2014 Dec;30(6):447-54. doi: 10.1111/edt.12120. Epub 2014 Aug 22.
The aim of this study was to apply biomechanical analysis model to evaluate the effects of bioabsorbable internal fixation devices on maxillary Lefort Ι fracture. CT scan technology and the finite element software (ansys) were used to establish three-dimensional finite element models of five resorbable internal fixation devices in maxillary Lefort Ι fractures. We used the model to calculate the stress of the upper jaw and internal fixation. We further analyzed the stability of fixation under four occlusions. The fixation using two bioabsorbable plates was not stable. The zygomaticomaxillary pillars fixation is more stable than other fixations. The stability of fracture fixation was influenced with the molar occlusion. The current study developed a functional three-dimensional finite element model of bioabsorbable internal fixation and compared the stability of five fixation methods for maxillary Lefort Ι fractures. The results would facilitate the application of bioabsorbable materials in dental clinic.
本研究的目的是应用生物力学分析模型来评估生物可吸收内固定装置对上颌Le FortⅠ型骨折的影响。采用CT扫描技术和有限元软件（ANSYS）建立上颌Le FortⅠ型骨折五种可吸收内固定装置的三维有限元模型。利用该模型计算上颌骨和内固定的应力。进一步分析了四种咬合情况下固定的稳定性。使用两块生物可吸收接骨板的固定不稳定。颧骨支柱固定比其他固定更稳定。骨折固定的稳定性受磨牙咬合的影响。本研究建立了生物可吸收内固定的功能性三维有限元模型，并比较了上颌Le FortⅠ型骨折五种固定方法的稳定性。研究结果将有助于生物可吸收材料在口腔临床的应用。
