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    Smaglyuk L.V., Sheshukov D.V.

    SOME DIFFERENCES IN THE SIZE OF TEETH IN ADOLESCENTS OF DIFFERENT SOMATOTYPES


    About the author: Smaglyuk L.V., Sheshukov D.V.
    Heading CLINICAL MEDICINE
    Type of article Scentific article
    Annotation To restore optimal teeth configuration or dentition dental professionals should take into account the morphological parameters of the teeth, their interdependence in the shape of the dentition, the state of occlusion, as well as other constitutional parameters of the human body. Hence, the issues on developing aesthetic criteria in terms of size of teeth considering the constitutional characteristics of the body are remaining relevant. The purpose of this study was to identify the peculiarities of the size of the teeth in adolescents depending on their constitutional and typological parameters of the body structure. The clinical trial included 181 students (85 male and 96 female) aged 21-25 years, whose average age was 23.09 + 0.11 years. Using previously obtained anthropometric findings we evaluated constitutional type of the male and female participants by L.Rees-HJEisenk, 1945. Depending on the value of the index, all the subjects examined, regardless of sex, were divided into three somatotypes: hypersthenic type (index value is less than 96), normosthenic type (index value ranged from 96 to 106) and asthenic type (the index value is over 106). The status of occlusion was assessed according to E. Angle classification (1906). In all the examined individuals, the impressions were taken for making control and diagnostic models. Evaluating the measurements of control and diagnostic models, we paid special attention to mesiodistal dimensions of 12 teeth of the upper and lower jaws. The analysis of the quantitative parameters obtained during the examination of patients was carried out by using mathematical statistics methods with the calculation of the average sample values (M), dispersion (σ) and errors of mean values (m). The calculations were performed on a personal computer using Microsoft Excel 2007, NCSS 2004 and SPSS for Windows. Release 13.0. Normostenic type was found out as the most common type of body structure in 99 (54,69%) male and female individuals studied. The asthenic type was identified in 52 (28.74%) adolescents, and 30 (16.57%) individuals were found out to have the hypersensitivity type of the body structure. The comparative analysis of the size of the maxillary teeth has demonstrated that the canines in the individuals of the hypersthenic type are of a larger mesiodistal size than in the individuals of normosthenic type (p <0,05), and than in asthenics (p <0,001). The second left maxillary premolar (25) differed in mesio-distal dimensions. The analysis of the measurements of the size of 12 mandibular teeth has shown the mesio-distal dimensions of the left lower canine in the hypersthenic individuals are significantly higher than those in the adolescents of normal and asthenic physique (p <0,05). Regarding the right lower canine, its size was statistically significantly higher in the hypersthenic individuals than in the normosthenic adolescents, p <0.05. The second mandibular premolars were revealed to be larger by their mesiodistal dimensions in the asthenic adolescents than in the normosthenic individuals. Mesiodistal size of the 25th and 35th teeth (the second left upper and lower premolars), as well as of the 45th (second right lower) teeth in the asthenic individuals were significantly higher than in the normosthenic individuals. The size of the 25th tooth in the asthenic individuals also exceeded the size of this tooth in the individuals with normal physique. Having evaluated the peculiarities of the teeth size in the group of hypersthenic individuals, we have found out all canines (13, 23, 33, 43) have a larger mesiodistal dimension than those in the group of normosthenic individuals (p <0,001), and the teeth 13, 23, 33 are larger than in the asthenic individuals. The mesiodistal size of the 32nd tooth in the hypertesthenic individuals was larger than that of normostenic adolescents (p <0.05). We have identified some charasteristics of mesiodistal sizes of teeth in adolescents depending on their somatotypes that should be taken into account in further researches devoted to different bite anomalies and the approaches of their correction.
    Tags morphological parameters of the teeth, state of occlusion, teeth somatotypes, mesiodistal dimensions, asthenic type, hypertesthenic, normostenic adolescents
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    Publication of the article «World of Medicine and Biology» №2(64), 2018 year, 078-080 pages, index UDK 611.314-022.5-021.272-053.81-056
    DOI 10.26724/2079-8334-2018-2-64-78-80