传统全景片和锥形束CT重建全景片测量牙轴近远中倾斜度的对比研究

发布时间：2018-10-19 18:55

【摘要】：目的比较传统全景片和锥形束CT(CBCT)重建全景片用于测量牙轴近远中倾斜度的准确性。方法收集15名个别正常志愿者的石膏模型,在模型上确定上下颌从左侧第一磨牙到右侧第一磨牙的牙体长轴和平面的标记点,制作放射显影装置,志愿者佩戴放射显影装置拍摄全景片和CBCT片。分别在石膏模型、全景片和CBCT重建全景片上测量牙轴近远中倾斜度。利用多元方差分析和Dunnett-t检验比较3种测量方法的差异。结果 3种测量方法间的差异有统计学意义(P=0.00)。与模型测量相比,全景片组中12个牙位有2个牙位(上下颌第二前磨牙)测量结果的差异有统计学意义(P=0.00),CBCT组12个牙位的差异均无统计学意义。结论评价牙轴近远中倾斜度时,传统全景片存在一定误差,CBCT重建全景片是一种更为有效的评价手段。
[Abstract]:Objective to compare the accuracy of traditional panoramic film and cone-beam CT (CBCT) reconstruction panoramic film in measuring the proximal and distal inclination of tooth axis. Methods the plaster models of 15 normal volunteers were collected, and the marking points of the long axis and plane of the upper and lower teeth from the left first molar to the right first molar were determined, and the radiography device was made. The volunteers wore radiographic devices to take panoramic and CBCT films. The angle of tooth axis was measured on gypsum model, panoramic film and CBCT reconstruction panorama respectively. Multivariate analysis of variance and Dunnett-t test were used to compare the differences of three measurement methods. Results the differences among the three methods were statistically significant (P < 0. 00). Compared with the model measurement, there were significant differences in 12 teeth positions (upper and lower second premolars) in panoramic film group (P 0. 00), CBCT group). There was no significant difference in 12 teeth positions in P0. 00), CBCT group. Conclusion there are some errors in traditional panoramic images when evaluating the proximal and distal inclination of tooth axis, and CBCT reconstruction is a more effective method.
【作者单位】：深圳华侨城医院口腔科;口腔疾病研究国家重点实验室华西口腔医院正畸科(四川大学);
【基金】：四川省科技厅科技支撑计划基金资助项目(2008SZ017-5) 四川省卫生厅科研基金资助项目(090304)
【分类号】：R783.5

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