- 期刊
Mandibular Incisive Canal on Dental CT Image in Taiwanese
台灣人下顎門齒神經管在電腦斷層影像的研究
摘要
背景：下齒槽神經(inferior alveolar nerve)經由下顎骨，於頦孔附近分爲二支分別爲頦神經(mental nerve)與門齒神經(incisive nerve)。由於人工牙根的普及，下顎骨前牙區的解剖構造有需要進一步的研究。因此本研究的目的是利用牙科電腦斷層影像來分析下顎門齒神經的構造。 材料與方法：138位牙科電腦斷層影像，男性與女性各69位：年齡爲46.31±12.01歲。牙科電腦斷層影像資料經Implant Max拿n體重組，定位頦孔(mental foramen)，前迴圈(anterior loop)。從前迴圈往近心側延伸即爲門齒神經管(incisive nerve canal)。進一步量測門齒神經管的長度並加以記錄。 結果：結果發現：（一）、大約有70%受檢者有下顎門齒神經管的影像存在：（二）、存在的影像顯示：右側門齒神經管長度爲6.76±6.15毫米：左側門齒神經管長度爲7.21±5.92毫米，（三）、左右兩側的門齒神經管長度並沒有統計上的差別(Pair t test, p=0.194)。 結論：下顎門齒神經的存在與否因人而異，且左右兩側的門齒神經管長度並沒有統計上的差別。希望藉由此研究可以提供人工植牙術前評估及診斷的參考。
並列摘要
Background: Mandibular incisive nerve is one of the branch of inferior alveolar nerve. It extends anteriorly in the mandible after separating from the mental nerve and forms a plexus to supply canines and incisors. The aim of this study was to investigate the existence of incisive nerve canal and extension from anterior loop of mental nerve using dental CT in Taiwanese population. Material and Methods: 138 mandibular dental CT images were selected from our data bank. There are 69 males and 69 females. The average age is 46.31±12.01 years old. Dental CT images were reformed using Implant Max® software. Mental foramen and anterior loop were located. The canal extension from medial side of anterior loop of mental foramen was recognized as incisive canal. The length of incisive nerve canal was measured. Results are (1) Around 70% cases did show incisive nerve canal; (2) The length of incisive nerve canal image on the right side is 6.76±6.15 mm and on the left side is 7.21±5.92 mm respectively; (3) The length of incisive nerve canal between right side and left side is not statistically significant (Pair t test, p=0.194). Conclusion: This study demonstrates that incisive nerve canal does exist in most cases. The length of incisive nerve canal is around 7 mm and no difference between right and left side.