Department of Diagnosis and Surgery, Araraquara Dental School, UNESP, Araraquara, SP, Brazil.
J Appl Oral Sci. 2012 Feb;20(1):76-81. doi: 10.1590/s1678-77572012000100014.
Furcation involvement in periodontal disease has been a challenge for the dentist.
The aim of this study was to investigate root dimensions in the furcation area of 233 mandibular first molars.
Digital photomicrographs were used to obtain the following measurements on the buccal and lingual surfaces of each tooth: root trunk height (RT), horizontal interadicular distance obtained 1 mm (D1) and 2 mm (D2) below the fornix and interadicular angle (IA).
Mean ± standard deviation of buccal and lingual furcation measurements were, respectively, 1.37 ± 0.78 mm and 2.04 ± 0.89 mm for RT; 0.86 ± 0.39 mm and 0.71 ± 0.42 mm for D1; 1.50 ± 0.48 mm and 1.38 ± 0.48 mm for D2; 41.68 ± 13.20° and 37.78 ± 13.18° for IA. Statistically significant differences were found between all measured parameters for buccal and lingual sides (p<0.05, paired t test).
In conclusion, the lingual furcation of mandibular first molars presented narrower entrance and longer root trunk than the buccal furcation, suggesting more limitation for instrumentation and worse prognosis to lingual furcation involvements in comparison to buccal lesions.
本研究旨在调查 233 颗下颌第一磨牙分叉区的牙根尺寸。
使用数字显微照片获取每颗牙齿颊面和舌面的以下测量值：根干高度（RT）、在游离龈下 1mm（D1）和 2mm（D2）处获得的水平根间距离以及根间角（IA）。
与颊侧病变相比，下颌第一磨牙的舌侧分叉口更窄，根干更长，器械进入和预后更差。
