The objective of this study is to determine a selection criterion that is applicable for the treatment of patients with dental arch asymmetry caused by loss of a premolar on one side of the mouth. Material and methods. Fifty-seven patients (first maturity level) who had some teeth extracted for orthodontic treatment were included in the study. The patients were divided into basic and control groups. We proposed to shape the extraction socket immediately after the extraction of a permanent tooth. In the basic group the extraction sockets were filled with osteoplastic material. Patients in the control group refused any surgical interventions. Results. According to a given criterion, the correlation between tooth size and dental arch parameters has been determined. When applying this criterion for finding the correlation, the frontal distal diagonal size of the dental arch was multiplied by 1.14 coefficient. The sum of the mesiodistal diameters of seven teeth in the half-arc was subtracted from the obtained value. The value which was equal to 0±1.0mm indicated the correlation between tooth size and dental arch parameters. Conclusion. If there is a correlation between tooth size and dental arch parameters, it is advisable to provide treatment associated with having the post-extraction socket opened and implant therapy performed (most commonly with the use of intraosseous dental implants).
Ivanova О.P., Dmitrienko S.V., Jaradajkina М.N., Dmitrienko D.S. Kovalev M.O., Mukhina N.M. Treatment planning for patients with dental arch asymmetry caused by loss of a premolar on one side of the mouth // Saratov Journal of Medical Scientific Research, Vol. 9, Issue 3, 2013, pp. 400-403

The objective of the study is to develop an algorithm for determining the correlation between tooth size, dental arch parameters and the craniofacial complex. Material and methods. 178 patients with physiological occlusion of permanent teeth and neutral type of jaw growth were examined to determine the correlation between tooth size, dental arch parameters and craniofacial complex. Correlation between tooth size and dental arch parameters was determined based on the relationship of the major dental arch parameters and the size of 12 teeth including first molars, premo-lars, canines and incisors, as well as the width of the face between zygomatic points and the distance between lateral surfaces of the wings of the nose. Results. The algorithm is based on the dentofacial index (D. F. I.), calculated as the percentage ratio of the sum of four incisors to facial width. Conclusions. In patients with mesodontism and physiologic occlusion of permanent teeth the dentofacial indexwas23.5%±1.5%. An increase in the dentofacial index up to 25.1% was indicative of individual macrodontia of four upper anterior teeth. The value below 21.9% indicated individual micro-dontia of four upper anterior teeth. The correlation between individual teeth of different types and compared the size of teeth in certain segments and dental arch parameters has been evaluated.
Dmitrienko S.V., Ivanova О.P., Dmitrienko D.S., Jaradajkina М.N., Soykher М.G. Algorithm for detecting correlations between tooth size and dental arch parameters // Saratov Journal of Medical Scientific Research, Vol. 9, Issue 3, 2013, pp. 380-383