Neves Frederico Sampaio, Nascimento Monikelly Carmo Chagas, Oliveira Matheus Lima, Almeida Solange Maria, Bóscolo Frab Norberto
Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Av. Limeira, 901, P.O. BOX 52, 13414-903, Piracicaba, Sao Paulo, Brazil,
Oral Maxillofac Surg. 2014 Dec;18(4):419-24. doi: 10.1007/s10006-013-0428-z. Epub 2013 Aug 24.
The objective of this study is to compare the ability of panoramic radiography and cone beam computed tomography (CBCT) in detecting anatomical variations of the mandibular canal and mental foramen.
One hundred twenty-seven preoperative panoramic and CBCT images were evaluated. Two oral and maxillofacial radiologists investigated the presence of bifid mandibular canals and/or additional mental foramina on the right, left, or both sides of the mandible. Intra- and interobserver reliability was determined using Cohen's kappa coefficient. McNemar's test compared the prevalence of mandibular anatomical variations between panoramic radiography and CBCT. The significance level was set at 0.05.
Additional mental foramen and bifid mandibular canal were detected in 1.2 and 7.4 % of the panoramic radiographs and 7.4 and 9.8 % of the CBCT images, respectively. The incidence of anatomical variations on the mandibular canal was not significantly different between both imaging modalities (P > 0.05).
Although CBCT provides better viewing of anatomical structures, including location, shape, and relationship with the surrounding area, panoramic radiography is a conventional imaging modality that can be used in the study of the bifid mandibular canals.
本研究的目的是比较全景X线片和锥形束计算机断层扫描（CBCT）检测下颌管和颏孔解剖变异的能力。
对127例术前全景X线片和CBCT图像进行评估。两名口腔颌面放射科医生检查下颌骨右侧、左侧或双侧是否存在双下颌管和/或额外的颏孔。使用Cohen's kappa系数确定观察者内和观察者间的可靠性。McNemar检验比较全景X线片和CBCT之间下颌骨解剖变异的患病率。显著性水平设定为0.05。
全景X线片和CBCT图像中分别有1.2%和7.4%检测到额外的颏孔，7.4%和9.8%检测到双下颌管。两种成像方式在下颌管解剖变异的发生率上无显著差异（P>0.05）。
尽管CBCT能更好地观察解剖结构，包括位置、形状以及与周围区域的关系，但全景X线片是一种可用于双下颌管研究的传统成像方式。
