Plagmann H C, Holtorf S, Kocher T
University of Kiel, Department of Periodontology, Germany.
J Clin Periodontol. 2000 Dec;27(12):926-31. doi: 10.1034/j.1600-051x.2000.027012926.x.
BACKGROUND, AIMS: The form of the molar roots and their furcated region influence both the pathogenesis of periodontal destruction and therapeutic attempts.
Using a specially-constructed measuring device, 359 1st and 2nd molars, both upper and lower, were analysed 3-dimensionally. The parameters measured were horizontal furcation concavity, height of root trunk, degree of root taper, the distance between the root prominences adjacent to the furcation entrances and the angle of root separation.
The mean horizontal furcation concavity in lower molars was 0.5 mm at a distance of 1 mm apical to the cemento-enamel-junction (CEJ) and 3 mm at the distance of 4 mm apical to the CEJ. The angle of root separation was between 16 degrees (lower jaw molars lingual) and 29 degrees (upper jaw molars distal). The vertical distance from root separation to CEJ averaged 3.3 mm in lower jaw molars and 4.8 mm in upper jaw molars.
Our findings underline the variability of furcation morphology.
背景、目的：磨牙牙根的形态及其分叉区域既影响牙周破坏的发病机制，也影响治疗效果。
使用特制的测量装置，对359颗上下颌第一和第二磨牙进行三维分析。测量的参数包括水平分叉凹陷、牙根干高度、牙根锥度、分叉入口相邻牙根突出部之间的距离以及牙根分离角度。
下颌磨牙在牙骨质-釉质界（CEJ）根尖1mm处的平均水平分叉凹陷为0.5mm，在CEJ根尖4mm处为3mm。牙根分离角度在16度（下颌磨牙舌侧）至29度（上颌磨牙远中侧）之间。下颌磨牙从牙根分离到CEJ的垂直距离平均为3.3mm，上颌磨牙为4.8mm。
我们的研究结果强调了分叉形态的变异性。
