ANATOMICAL RELATIONSHIP OF THE MANDIBULAR CANAL TO ITS SURROUNDING STRUCTURES IN MATURE MANDIBLES
ANATOMICAL RELATIONSHIP OF THE MANDIBULAR CANAL TO ITS SURROUNDING STRUCTURES IN MATURE MANDIBLES
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DOI：
10.1016/s0099-2399(06)81411-1
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发表时间：
1992-04-01
影响因子：
4.2
通讯作者：
BAKLAND, LK
中科院分区：
文献类型：
--
作者：
DENIO, D;TORABINEJAD, M;BAKLAND, LK
关于下颌管与其周围结构（如根尖）的解剖关系，文献中缺乏一致意见。本研究的目的是研究干燥的人下颌骨中下颌管与后牙的空间关系。通过第一和第二前磨牙和磨牙的根尖切片22个成熟的干燥下颌骨。第二前磨牙和第二磨牙与根管的距离最近，平均值分别为4.7 mm和3.7 mm。第一磨牙近中牙根尖距根管最远，平均为6.9mm。31%的成年下颌骨根管通道呈S形曲线。在41%的病例中，它位于舌侧（19%），颊侧（17%）或直接位于后牙根尖下方（5%）。在28%的病例中，第二前磨牙和第一磨牙区域的根管不能清楚地识别。在典型的S形构型中，根管位于第二磨牙远中根的颊侧，在第二磨牙近中根下方与舌侧交叉，向舌侧延伸至第一磨牙，并交叉回到颊侧根尖至第二前磨牙的根尖。根据我们的结果，下颌第二前磨牙和第二磨牙似乎是最有可能在根管治疗期间意外损伤下颌管的牙齿。
A lack of agreement exists in the literature regarding the anatomical relationship of the mandibular canal to its surrounding structures such as the root apices. The purpose of this investigation was to study the spatial relationship of the mandibular canal to the posterior teeth in dried human mandibles. Twenty-two mature dried mandibles were sectioned through the root apices of the first and second premolars and molars. Second premolars and second molars had the closest distances to the canal with a mean of 4.7 mm and 3.7 mm, respectively. With a mean of 6.9 mm, the apices of the mesial roots of the first molars were farthest from the canal. The canal pathway in mature mandibles followed in S-shaped curve in 31% of the cases. In 41% of the cases it was located lingual (19%), buccal (17%), or directly inferior (5%) to the apices of the posterior teeth. In 28% of the cases the canal could not be identified clearly in the second premolar and first molar regions. In a typical S-shaped configuration the canal was located buccal to the distal root of the second molar, crossed to the lingual below the second molar mesial root, ran lingual to the first molar, and crossed back to the buccal apical to the apex of the second premolar. Based on our results it appears that the mandibular second premolar and second molar are the most likely teeth to be involved in accidental damage to the mandibular canal during root canal therapy.