| Summary: | 碩士 === 高雄醫學大學 === 牙醫學研究所 === 99 === Objective: The cone-beam computed tomography (CBCT) provides precise images and has been widely used in preoperative implant planning. The aim of the study is to analyze the visibility and to trace the course of the mandibular incisive canals (MIC) by application of CBCT.
Material and Method: 35 subjects received mandibular CBCT (Picasso-Trio, Vatech, Korea) as pre-implant examination. Two inspectors define and locate each mandibular incisive canal’s visibility on the CBCT images through the Picasso Ezimplant 3D software. Average lengths from center of MIC to vertical inferior, horizontal buccal and lingual border of mandible body were recorded. The average MICs’ diameters and lengths of mesial extension were also measured. Statistical analysis were carried out to study MIC differences between age, bilateral side, and edentulous factors.
Result: The incisive canal was visible in 85.71% of the scans, the mean extension is 14.9±3.09mm(SD) and the diameter ranged from 0.8 to 2.42mm. MIC proceeds from the buccal plate towards the lingual plate with slightly downward direction.
Conclusion: The high detection rate of the mandibular incisive canal at the anterior region of mandible indicated the potential high preoperative value of CBCT scan for surgical procedure in the anterior mandible. Although the differences between sides of mandibular incisive canal were not statistically significant, the variance still exist and even higher among individuals.
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