The relation between pulp chamber roof and cemento-enamel junction of mandibular first molar based on cone beam computed tomography in Chinese Han population
LIU Yan
NIU Zhong-ying
WANG Rui
YAN Shu
ZHANG Jian-zhong
SHI Su-meng
GUO Yi-xin
Abstract：AIM:To investigate the relationship between pulp chamber roof and cemento-enamel junction of mandibular first molar in Chinese Han population by using cone-beam computed tomography (CBCT).METHODS:CBCT images of 420 mandibular first molars in Chinese Han population (210 males and 210 females) were collected and divided into 6 age groups based on 10-year interval as following:15-24,25-34,35-44,45-54,55-64 and 65-74 years.The images were measured by Galileo software of CBCT;the distance between the lowest position of pulp chamber top and enamel-dentinal junction of the molar pulp was measured in vertical direction and then statistically analysed.RESULTS:On M-D plan,the vertical distance between the lowest position of pulp chamber top and enamel-dentinal junction of mandibular first permanent molar pulp was (-0.82 ± 0.63) mm in males and (-0.78 ± 0.60) mm in females (P＞0.05) respectivety.On B-L plan,the figure was (-0.72 ±0.63)mm in males and (-0.61 ±0.62)mm in females(P ＜ 0.05),respectively.There was negative correlation between the distance and age (P ＜ 0.05).CONCLUSION:In Chinese Han population,the roof of mandibular first molar pulp chamber is located within 1 mm below the cemento-enamel junction.There is no gender difference between genders in the distance.But age is negatively related with distance.
Keywords：CBCTmandibular first molarroof of pulp chambercemento-enamel junction
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 28-31 )