论文部分内容阅读
目的:采用三维重建技术,测量并比较成年女性骨性双颌前突患者和个别正常牙合的固有口腔容积的大小。方法:采用计算机辅助三维测量技术,对15名双颌前突成年女性和15名个别正常牙合成年女性的颌面部CT数据进行三维重建;在三维模型上划分固有口腔的界限并逐层分离出固有口腔后,利用系统自带软件对固有口腔的体积以及相关指标进行测量分析。结果:骨性双颌前突成年女性和个别正常牙合女性的固有口腔容积分别为(68.3±9.30)cm3和(62.99±10.10)cm3(P<0.05);双颌前突患者的固有口腔在矢状向上的投影面积、长度、高度均显著大于正常牙合(P<0.05),下颌骨长度显著小于正常牙合(P<0.05),但固有口腔的宽度两者无显著性差异(P>0.05)。结论:三维测量固有口腔是一种确实可行的测量方法;通过测量双颌前突固有口腔的容积,可为后续研究提供理论依据。
OBJECTIVE: To measure and compare the size of the natural oral cavity in adult female patients with bimaxillary protrusion and individual normal occlusion by three-dimensional reconstruction. Methods: The maxillofacial CT data of 15 adult female patients with bimaxillary protrusion and 15 normal adult female teeth were reconstructed using computer-aided three-dimensional measurement technique. The three-dimensional model was used to divide the inherent oral cavity boundaries and separate them layer by layer After the inherent oral cavity, using the system comes with the software on the inherent volume of oral cavity and related indicators for measurement and analysis. Results: The intrinsic oral volumes of adult female and normal occlusion women were (68.3 ± 9.30) cm3 and (62.99 ± 10.10) cm3 respectively (P <0.05). The intrinsic oral cavity in patients with bimaxillary protrusion The projected area, length and height of the sagittal plane were significantly larger than those of the normal occlusion (P <0.05), and the length of the mandible was significantly smaller than that of the normal occlusion (P <0.05). However, there was no significant difference in the width of the oral cavity between the two groups (P> 0.05). CONCLUSION: Three-dimensional measurement of the native oral cavity is a feasible measurement method. By measuring the volume of the oral cavity with bilateral maxillary protrusion, it can provide a theoretical basis for the follow-up study.