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目的探讨并建立颌骨前突畸形三维解剖测量方法与诊断标准。方法通过计算机编程建立颌骨前突畸形的三维解剖测量方法;对14例志愿者二维X线头影测量与计算机辅助三维解剖测量的结果对比分析。结果①建立了正中矢状面上鼻根点与上齿槽座点连线(NA)、鼻根点与下齿槽座点连线(NB)与眼耳平面(FH)的α角、β角来反映上颌骨、下颌骨对于颅部位置关系;并建立正常诊断范围:α:88°~93°;β:87°~90°。②统计结果提示二维测量与三维测量对正常颌骨无显著性差异,对于异常颌骨有显著性差异。结论计算机辅助颌骨前突畸形的三维解剖测量方法是可行的,体现三维解剖的空间立体关系,提高诊断的准确度,为颌骨畸形诊断和治疗提供了客观依据。
Objective To explore and establish a three-dimensional anatomical measurement of mandibular protrusion deformity and diagnostic criteria. Methods Three-dimensional anatomical measurement of maxillary protraction was established by computer programming. The results of two-dimensional X-ray and computer-aided three-dimensional anatomical measurements of 14 volunteers were compared and analyzed. Results ① The angle (α) between the nasal root point and the upper alveolar locus (NA), the angle α between the nasal root point and the lower alveolar locus (NB) and the eye-ear plane (FH), β Angle to reflect the maxilla, mandible for the cranial position; and the establishment of normal diagnostic range: α: 88 ° ~ 93 °; β: 87 ° ~ 90 °. ② Statistical results suggest that two-dimensional and three-dimensional measurements of the normal jaw no significant difference in the jaw for the significant difference. Conclusions Computer-assisted 3D anatomical measurement of maxillary protrusion is feasible, reflecting the spatial three-dimensional relationship between the three-dimensional anatomy and improving the accuracy of diagnosis, providing an objective basis for the diagnosis and treatment of jaw deformity.