Inferior Alveolar Canal Course: A Digital Panoramic Study

Objectives:To describe the morphology and course of the inferior alveolar canal(IAC) as it appears in digital panoramic radiographs.Materials and Methods:Three hundred eighty-six digital rotational panoramic radiographs(OPG) were studied using the Clinview Software(6.1.3.7 vertion, Instrumentarium).Among the 386 radiographs,86 radiographs with 5mm-steel balls were used to calculate the magnification.Results:Average magnification of radiographs in this study was 7.24±7.55%.The course of IAC as seen in the panoramic radiograph may be classified into four types:1) Linear curve,12.75%,2) spoon-shape curve,29.25%,3) elliptic-arc curve,48.50%,and 4) turning curve,9.50%.On panoramic radiographs,the IAC appeared closest to the inferior border of the mandible in the region of the first molar.In relation to the teeth, on panoramic radiographs,the IAC appeared closest to the distal root tip of the third molar and furthest from the mesial root tip of the first molar.5 excellent implant cases were chosen as a clinical case report.Conclusion:In the OPG,there are four types of IAC:Linear,spoon-shape,elliptic-arc, and turning curve.The data found in the study may be useful for the dental implant, mandibule surgery and dental anesthesia.The limitations of the panoramic radiograph in depicting the true three-dimensional morphology of the IAC is recognised.