Dimensions of hard dental tissues and pulp cavity of the crown in first mandibular molar measured with computerized...

In spite of the numerous studies (carried out by different authors and with various methods) to determine the dimensions of teeth, the size of the enamel and the dentin in different topographic regions of the tooth crown have not yet been established. The present study aimed at developing a mathematical model of the first mandibular molar by measuring the thickness of its enamel, dentin and pulp cavity. The study was conducted upon 15 first mandibular molars in 18-year-old high-school students with intact dentition using computerized tomography (SY-3000). The hard dental tissues dimensions in different topographic regions of first mandibular molar were determined by densoprofile measuring of four 1-mm-wide sections oriented in relation to the frontal plane and axis of the tooth. The obtained data are presented in a tabular form. The basic values for the crown height, the mediodistal and vestibulo-oral dimensions do not differ significantly from the values that are currently widely-known in the literature. The thickness of the enamel and dentin in different topographic regions are determined in details, which gives a clear picture of the safety zones location around the pulp cavity. On the basis of the obtained results it is possible to develop a mathematical model of the first mandibular molar.