Mbajiorgu E F
Department of Anatomy, Faculty of Medicine, University of Zimbabwe, P O Box MP 167, Mount Pleasant, Harare, Zimbabwe.
Cent Afr J Med. 2000 Jul;46(7):184-90. doi: 10.4314/cajm.v46i7.8554.
To determine the position of the mandibular foramen on dry adult mandibles and hence provide valuable information for dental and other health practitioners for successful inferior alveolar nerve anaesthesia.
A cross sectional study.
Department of Anatomy, Faculty of Medicine, University of Zimbabwe, Mount Pleasant, Harare, Zimbabwe.
38 dry mandibles from adult black Zimbabweans.
The anterior and posterior rameal widths, upper and lower rameal heights and the height of the lingula were measured with respect to the position of the mandibular foramen. The distribution of the foramen in relation to the occlusal plane was determined.
The results showed that the position of the mandibular foramen was highly individualistic but on average lies at about 2.56 mm (right) and 2.08 mm (left) behind the midpoint of rameal width and at approximately 3 mm superior to the midpoint of rameal height on both sides. The mean anterior and posterior rameal widths were respectively 18.95 +/- 0.41 and 14.30 +/- 0.35 while the mean rameal heights were respectively 22.50 +/- 0.50 (upper) and 28.44 +/- 0.65 (lower). The distribution of the foramen in relation to the occlusal plane was 47.1% at the same level with the occlusal plane, 29.4% above, and 23.5% below the plane. There was no side variation in the position of the foramen in relation to the occlusal plane, in the dimensions of the ramus and in the size of the mandibular foramen but individual variations exist. The height of the lingula however showed great variation. The mean height was 8.40 +/- 0.39 (right) and 8.36 +/- 0.38 (left).
The study has shown similarities and differences between the rameal dimensions and the position of the mandibular foramen in adult black Zimbabwean mandibles and those of other subpopulations. The clinical significance of accurately locating the mandibular foramen during a local anesthetic block of the inferior alveolar nerve is discussed.
确定干燥成人下颌骨上下颌孔的位置，从而为牙科及其他医疗从业者成功实施下牙槽神经麻醉提供有价值的信息。
横断面研究。
津巴布韦大学医学院解剖学系，位于津巴布韦哈拉雷芒特普莱森特。
38具成年津巴布韦黑人的干燥下颌骨。
测量下颌孔位置的下颌支前后宽度、上下高度以及舌骨高度。确定下颌孔相对于咬合平面的分布情况。
结果显示，下颌孔的位置高度因人而异，但平均而言，位于下颌支宽度中点后方约2.56毫米（右侧）和2.08毫米（左侧）处，且两侧均位于下颌支高度中点上方约3毫米处。下颌支前后平均宽度分别为18.95±0.41和14.30±0.335，而下颌支平均高度分别为22.50±0.50（上部）和28.44±0.65（下部）。下颌孔相对于咬合平面的分布情况为：与咬合平面处于同一水平的占47.1%，高于平面的占29.4%，低于平面的占23.5%。下颌孔相对于咬合平面的位置、下颌支尺寸以及下颌孔大小均无左右差异，但存在个体差异。然而，舌骨高度显示出很大差异。平均高度为8.40±0.39（右侧）和8.36±0.38（左侧）。
该研究显示了成年津巴布韦黑人下颌骨与其他亚人群在下颌支尺寸和下颌孔位置上的异同。讨论了在下牙槽神经局部麻醉阻滞期间准确定位下颌孔的临床意义。
