PURPOSE: Dental CT software program can provide reformatted cross-sectional and panoramic images that cannot be obtained with conventional axial & direct coronal CT scan. The purpose of this study is to describe the method of the technique and to identify the precise anatomy of jaw. MATERIALS AND METHODS:We evaluated 13 mandibles & 7 maxillae of 15 subjects without bony disease who were being considered for endosseous dental implants. Reformatted images obtained by the use of bone algorithm performed on GE HiSpeed Advantage CT scanner were retrospectively reviewed for detailed anatomy of RESULTS: Anatomy related to neurovascular bundle(mandibular foramen, inferior alveolar canal, mental foramen, canal for incisive artery, nutrient canal, lingual foramen and mylohyoid groove), muscular insertion(mylohyoid line, superior & inferior genial tubercle and digastric fossa) and other anatomy(submandibular fossa, sublingual fossa, contour of alveolar process, oblique line, retromolar fossa, temporal crest & retromolar triangle) were well delineated in mandible. In maxilla, anatomy related to neurovascular bundle(greater palatine foramen & groove, nasopalatine canal and incisive foramen) and other anatomy(alveolar process, maxillary sinus & nasal fossa) were also well delineated. CONCLUSION: Reformatted images using dental CT software program provided excellent delineation of the jaw anatomy. Therefore, dental CT noftware program can play an important role in the preoperative assessment of mandible and maxilla for dental implants and other surgical conditions.