In this work, we describe the boundary percentile scope values of transversal characteristics of the dental arch of boys and girls of Podillia, with diagnosed orthognathic bite. The study group consists of individuals with different forms of head and face. Our findings are that, in girls, unlike boys, set differences exist in the transversal dimensions of the upper and lower jaw, both in the distribution of the shape of the head, and the type of face. In boys with different head shape, larger values of transversal size of dental arch are evidenced when contrasted with the corresponding groups of girls, regarding the maxilla in 46.7% of all cases and the mandible in 22.2% of all cases, as well as with different types of faces in 66.7% of cases regarding the maxilla and 55.6% in the mandible.
Ethnic, sexual and age features of the incisors positions point to the need for the development of techniques that allow to determine their individual characteristics, since commonly accepted standards recommended for optimal positioning of incisors can only be used as indicative. The purpose of the study – by studying teleroentgenographic indices and conducting direct stepwise regression analysis in young men and young women of Ukraine with orthognathic bite, to develop and analyze the mathematical models of individual characteristics of the position of the lower medial incisors. With the Veraviewepocs 3D device, Morita (Japan) in 38 young men (17 to 21 years of age) and 55 young women (aged from 16 to 20 years) with occlusion close to orthognathic bite and balanced faces received side teleroentgenograms. Cephalometric analysis was performed using OnyxCeph3TM software. Cephalometric points and measurements were performed according to the recommendations of A.M. Schwarz, J. McNamara, W.B. Downs, R.A. Holdway, P.F. Schmuth, C.C. Steiner and C.H. Tweed. According to the above methods, in the licensed package “Statistica 6.0” using direct straight line regression analysis, the teleroentgenographic characteristics of the position of the lower medial incisors (distance 1l_NB, distance 1l_APog, angle 1l_DOP, IMPA angle, Mand1_NB angle, FMIA angle and Mand1_MeIm angle) were performed. In young men with orthognathic bite of 7 possible models of teleroentgenographic characteristics of the lower medial incisors, 5 were constructed with determination coefficient R2 from 0.694 to 0.849, and in young women, all 7 possible models with determination coefficient R2 from 0.595 to 0.794. In young men most often the regression equations included - the angle ANB and facial vertical index GL_SN_S (by 11.5%); lower face height ANS_ME, face angle NBA_PTGN and distance S_E (by 7.7%). In young women most often the regression equations included – the angle of N_POG (16.7%); Wits indicator (13.9%); inclination angle I (8.3%); H-angle, maxillo-mandibular angle MM and angle of facial axis NBA_PTGN (by 5.6%). Thus, in the work with the help of the method of stepwise regression with inclusion, among Ukrainians of juvenile age, on the basis of features teleroentgenographic indicators, the analysis of reliable models of individual teleroentgenographic characteristics of the position of the lower medial incisors was developed and carried out.
The lack of the ability to determine the individual standard angle characteristics of the position of the teeth and the technical provision of their control often does not lead to the expected result and in each case requires individualization, the vision of which is based, as a rule, on the experience and intuition of the doctor. In order to solve such a situation, in addition to improving the positioning protocols of the non-removable equipment, the physician should be able to clearly identify the individual angular characteristics of the tooth-jaw system. The purpose of the study – by studying computer tomography and cephalometric indices and conducting direct stepwise regression analysis to develop in Ukrainian adolescents with orthognathic bite mathematical models of individual angular positions of teeth. Using the Veraviewepocs 3D device, Morita (Japan) at 38 young men (aged from 17 to 21) and 55 young women (aged from 16 to 20 years) with normal occlusion close to orthognathic bite received and analyzed dental tomograms and lateral teleroentgenograms. Cephalometric points and measurements were performed according to recommendations of A. M. Schwarz, J. McNamara, W. B. Downs, R. A. Holdway, G. P. F. Schmuth, C. C. Steiner and C. H. Tweed. Anatomical points were determined taking into account the recommendations of A. E. Athanasiou and S. I. Doroshenko and Y. A. Kulginsky. The simulation of CT indexes describing the position of individual teeth relative to each other, to the bone cranial structures and the profile of adolescents with orthognathic bite, depending on the metric characteristics of the skull, which are usually unchanged during surgical and orthodontic treatment, as well as the width, lengths, angles and positions of the upper and lower jaws that may be altered by orthodontic surgery done. The statistical processing of the obtained results was carried out in the license package “Statistica 6.0” using a direct stepwise regression analysis. It was found that in young men of 40 possible models, 23 were constructed with a determination coefficient R2 of 0.557 to 0.832, while in young women, only 8 models with a determination coefficient R2 of 0.581 to 0.832. Moreover, in the young men – of 10 possible 9 models of vestibular-tongue inclination of corresponding teeth (R2 from 0.557 to 0.832) were constructed; out of 10 possible 5 models of mesio-distal inclination of corresponding teeth (R2 from 0.558 to 0.769) constructed; of the possible 14 constructed 6 models of rotation of the corresponding teeth (R2 from 0.579 to 0.737); and in young women - there are only 5 models of vestibular-tongue inclination of the corresponding teeth (R2 from 0.603 to 0.665). In addition, in both young men and young women, models of the size of the inter-incision angle (R2 0.748 in young men and 0.581 in young women) were constructed, the magnitude of the angle of inclination of the lower canine in the jet plane (R2 respectively 0.729 and 0.793), and the magnitude of the inclination of the closure planes relative to the palatal plane (R2 respectively 0.808 and 0.832). In the analysis it was found that in young men, most frequently models included - indicator WITS (7.0%); angle GL_SNPOG (5.4%); distance S_E, angle ММ, angle NSBA (by 4.7%); angle AB_NPOG, angle N_POG_, distance N_SE, coefficient N_SP_SP, angle P_OR_N (by 3.9%). In young women, most frequently models included – angle N_POG_ (14.3%); angle AB_NPOG (10.2%); indicator WITS (8.2%); angle ММ, angle ANB, length of the branch of the mandible R_ASC (by 6.1%). Thus, in the work with the help of the method of step-by-step regression with inclusion, among Ukrainian adolescence, on the basis of peculiarities of computer-tomographic and teleroentgenography indices, reliable models of computer-tomographic individual linear angular characteristics of the position of teeth necessary for constructing the correct three-dimensional geometry of dental arches are developed and analyzed.
The study of the parameters of the upper respiratory tract has become one of the leading directions of medical research, due to the connection of this structure with the occurrence and course of many diseases of both childhood and adulthood. The study of normative indicators of this structure and its relationship with craniometric indicators should be the first step before further research of samples with pathologies. The purpose of the study is to establish correlations of cephalometric parameters of the upper respiratory tract in Ukrainian young men and young women with an orthognathic bite, regardless of the type of face. Primary lateral radiographs of 49 Ukrainian young men (aged 17 to 21 years) and 76 Ukrainian young women (aged 16 to 20 years) with an orthognathic bite and the absence of upper respiratory tract pathology taken from the database of the research center and the Department of Pediatric Dentistry age of National Pirogov Memorial Medical University, Vinnytsia, with the help of the licensed medical software OnyxCeph3™, version 3DPro (Image Instruments GmbH, Germany) and the diagnostic program “UniqCeph”, a cephalometric analysis of the upper respiratory tract was performed. In the “Statistica 6.0” license package, correlations between cephalometric indicators of the upper respiratory tract were assessed using non-parametric Spearman statistics. In Ukrainian young men, multiple, mostly direct, medium-strength (r= from 0.32 to 0.48) and strong (r= from 0.65 to 0.83) correlations were established between most of the characteristics of the upper respiratory tract or tongue; in young women, there are also predominantly direct, medium-strength (r= from 0.33 to 0.57) and strong (r= from 0.62 to 0.85) correlations between most of the characteristics of the upper respiratory tract or tongue, as well as medium-strength inverse (r= -0.30 and -0.40) and direct (r= 0.45 and 0.85) correlations between most characteristics of the soft palate. In addition, in Ukrainian young men, multiple inverse correlations of mainly medium strength (r= from -0.33 to -0.49) were established between the value of the PASmin distance and the UAA section with the value of the SPT distance and the SPA section, and between the value of the NL/PM-U angle and most of the characteristics the tongue, as well as multiple direct, mostly medium strength (r= from 0.30 to 0.55), connections between the characteristics of the upper respiratory tract itself and the hyoid bone or tongue and between the characteristics of the hyoid bone and the tongue; in young women, there are mainly straight lines of medium strength (r= from 0.33 to 0.55) between the value of the AH-CV distance and most of the characteristics of the upper respiratory tract itself, between the value of the AH-FH distance and all characteristics of the tongue, and between the value of the PM-U distance and by the distance VT and the section TA. Thus, the most pronounced manifestations of sexual dimorphism of connections are established between the characteristics of the soft palate, between the characteristics of the upper respiratory tract itself and the soft palate or tongue, as well as between the characteristics of the soft palate and the hyoid bone.
Using a constitutional approach to predict the onset of a disease can be key not only to solving the problem of late-stage lifestyle modification therapy but also to understanding the deep, seemingly incomprehensible links between organs and body structure. The aim of the study was to establish and analyze the differences in total, longitudinal and transverse body sizes between healthy and/or psoriatic men of different somatotypes depending on the severity of the disease. Anthropo-somatotypological examination was performed on Ukrainian men (aged 22 to 35 years) with psoriasis (n=100, including 32 with mild and 68 with severe). A clinical assessment of the severity and area of psoriatic lesions was performed using the PASI index. Anthropometric data of 82 practically healthy men of the same age group was taken from the data bank of the research center of National Pirogov Memorial Medical University, Vinnytsya. Statistical processing of the obtained results was performed in the license package “Statistica 5.5” using non-parametric evaluation methods. In patients with mild and severe psoriasis, men of mesomorphic and endo-mesomorphic somatotypes in comparison with healthy men of the corresponding somatotypes, higher values of almost all total (in the endo-mesomorphs with severe disease), transverse (except for shoulder width) and lateral body size (except endo-mesomorphs with severe disease) was found. In patients with psoriasis, men of endo-mesomorphic somatotype with a mild course of the disease found greater than in patients with a similar course men of mesomorphic somatotype, body weight, length and surface area, height of acromial and finger anthropometric points, and transverse middle thoracic diameters and anteroposterior middle thoracic diameter; and in patients with psoriasis men of endo-mesomorphic somatotype with a severe course of the disease – only greater values than in patients with a similar course of the disease men of mesomorphic somatotype, interspinous distance. When comparing the total, longitudinal and transverse dimensions of the body between men with psoriasis of the corresponding somatotypes, in representatives of the mesomorphic somatotype with a mild course of the disease found greater than with severe course, body length values and lower – posterior middle thoracic diameter. The revealed differences in total, longitudinal and transverse body sizes between healthy and/or patients with mild or severe psoriasis Ukrainian men of mesomorphic and endo-mesomorphic somatotypes provide an opportunity to increase the effectiveness of the use of body structure and size to identify risk groups psoriasis.
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