However, these two-dimensional radiographs can be affected by tissue superimposition due to malocclusion deformity or other complex situations. Panoramic radiography and periapical radiography are important methods in dental implant planning. The distances measured by OPG were highly correlated with that measured by CBCT.

The magnification rates of OPG at these teeth are different. Compared with data obtained from CBCT, the mean vertical magnification rates were 11.38% and 12.95% vertically and 8.55% and 9.43% horizontally for the first molars in the right and left maxilla respectively 7.26% and 6.35% vertically and 5.33% and 4.96% horizontally for the first molars in the right and left mandible respectively and 5.55% and 4.84% vertically and 6.53% and 7.47% horizontally for the central incisors in the upper right and left jaws respectively. The correlation coefficients (R) between the paired samples obtained from OPG and CBCT were highly related ( PвЂ‰<вЂ‰0.05) with R values varying from 0.840 and 0.959 in vertical distances and R values varying from 0.703 and 0.904 in horizontal distances. The relationship between the data acquired from the two methods was analyzed Pearson correlation. The magnification rates at these positions were calculated. The distances between the two methods were compared using paired t-test. The distances derived from CBCT were used as reference. The horizontal distance in those loci were also measured. The vertical distance between the alveolar ridge crest of the maxillary first molar and the sinus bottom of the upper jaw, the distance between the alveolar ridge crest of the mandibular first molars and the top of nerviduct in the mandibular alveolar, and the distance between the alveolar ridge crest of the maxillary central incisors and the bottoms of the nasal cavities were measured. MethodsД®ighty-six patients demanding dental implanting were scanned by CBCT and OPG. This study investigated the magnification rate of OPG in measuring different maxillofacial loci compared with CBCT. Therefore, it is clinically meaningful to determine the magnification rate of OPG to obtain correct diagnosis. The doctors in local hospitals have to make reasonable dental planting using orthopantomography (OPG) to reduce risks. However, the local hospitals usually donвЂ™t have access to CBCT due to the cost and medical investment, especially in West of China. Cone beam computerized tomography (CBCT) has been widely used in dental implanting.

Panoramic radiograph scan cdr dicom