CORRELATION BETWEEN DOMINANTING HAND AND SIZES OF PULP CHAMBERS OF THE FIRST MOLARS
Each adult has a functionally dominant side of chewing, which is manifested by a more pronounced change in the hard tissues of the teeth on the predominant side. Considering the fact that the number of left-handed people in a population can reach 30%, the possibility of establishing a dominanting handing in the late post-mortal period can significantly narrow the circle of identifiable individuals. In this work, the authors Install the correlation of the dominant hand and the size pulp chambers of the first molars. The study involved 99 males and females, aged 19 to 44 years, with an orthognathic bite. All participants were surveyed (questions and functional tests to determine the leading hand). The subject underwent a CT study of the maxillofacial region using a Gendex GX CB 500 conical beam computed tomography scanner (USA). The processing of the obtained images was carried out using i-CAT Vision software. The Dominant hand index (IVR) was calculated using the areas of the first molars of each segment according to the developed formula: IVR = (S16 + S46) / (S26 + S36). Statistical processing was performed using the R language (http://cran.r-project.org) version 3.4.3. The obtained differences in the sizes of the pulp chambers of the first molars were the basis for developing the index dominant hand, which can be used as a diagnostic criterion for determining the dominant hand. An index value of less than 1 indicates right-handedness; the index value is greater than 1 - left-handedness.