摘要
目的比较锥形束计算机体层摄影术(CBCT)生成的半颅头颅侧位定位片与传统X线头颅侧位定位片的差异,探讨CBCT生成的半颅头颅侧位定位片对骨性Ⅲ类错患者的诊断和评价作用。方法选取30例骨性Ⅲ类错手术患者。每位患者分别在术前和术后拍摄CBCT和X线头颅侧位定位片,并通过CBCT生成相应的半颅头颅侧位定位片。对两种头侧片分别进行测量,用Winceph8.0软件对测量值进行比较。用Mimics10.01软件对CBCT生成的三维模型进行测量。通过算式将CBCT生成的半颅头颅侧位定位片线距测量值进行校正,将校正值与相应CBCT三维测量值进行比较。结果传统头颅侧位定位片的SNA、SNB、下颌平面角、下颌升支长与CBCT生成相应值间的差异有统计学意义,其余差异无统计学意义。CBCT生成的半颅头颅侧位定位片线距测量值与相应CBCT三维测量值存在差异,但校正后两者间差异无统计学意义。结论 CBCT生成的半颅头颅侧位定位片在骨性Ⅲ类错患者诊断和评价方面更准确,可以代替传统的X线头颅侧位定位片。
Objective To compare the difference of cephalometric measurements obtained from conventional cephalograms and cone-beam computed tomography （CBCT） synthesized half-skull cephalograms, and to investigate specific applications of CBCT synthesized half-skull cephalograms in diagnosis and treatment of patients with skeletal Class Ⅲ malocclusion. Methods 30 patients who were diagnosed as skeletal Class Ⅲ malocclusion and underwent surgical-orthodontic treatment were selected. The patients took CBCT and conventional cephalograms before and after surgical treatment. Conventional and CBCT-synthesized cephalograms （right and left） were measured through Wineeph8.0 and compared, and the three-dimensional models reconstructed by CBCT were evaluated using Mimies10.01. Convert the measurements derived from CBCT-synthesized cephalograms into new quantitative values using algorithm, and compare the difference between the equivalent values and the three-dimensional measurements obtained from CBCT. Results Significant differences in SNA,SNB,FMA,Co-Go were shown in conventional and CBCT-synthesized cephalograms, while no significant differences were shown in other measurements. All measurements of the CBCT-synthesized cephalograms were significantly different from the corresponding measurements derived from the three-dimensional models reconstructed by CBCT. When the algorithm was used to correct the two-dimensional measurements, however, no statistical differences were shown between the CBCT group and the algorithm group. Conclusions CBCT- synthesized cephalograms can successfully replace conventional cephalograms and provide greater accuracy in diagnosis and treatment of patients with skeletal Class Ⅲ malocclusion.
出处
《中华口腔医学研究杂志（电子版）》
CAS
2012年第3期50-54,共5页
Chinese Journal of Stomatological Research(Electronic Edition)
基金
广东省科技计划(2010B080701101)
