Determination of Normal Cephalometric Parameters by J. McNamara Method for Ukrainian Boys and Girls

Гунас, И. В.; Dmitriev, М.О.; Tykholaz, V. O.; Shinkaruk-Dykovytska, М. М.; Пастухова, В. А.; Melnik, Marina; Rudiy, Yu. I.

doi:10.26724/2079-8334-2018-1-63-19-22

Cited by 11 publications

(9 citation statements)

References 6 publications

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“…Unfortunately, the work of domestic scientists on this subject is rather small [13,16,17,22,23]. This greatly №32, Page 56-62 complicates the use of techniques of cephalometric analysis of lateral teleroentgenograms and in particular the Ricketts method, which in turn impairs the provision of orthodontic care to the Ukrainian population.…”

Section: Discussionmentioning

confidence: 99%

Regression models of individual cephalometric indicators used in the method of R. M. Ricketts

Черныш

2018

Biomed. and Biosoc. Anthrop.

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It is proved that in the analysis of lateral teleroentgenograms according to different methods distances and angles have their normative indices which differ for persons of different ethnic, gender and age belongings. Therefore, for a full use in the orthodontics R.M. Ricketts method, similar studies are needed in Ukraine. The purpose of the work -in boys and girls with normal occlusion close to the orthognathic bite and harmonious face construct and analyze the regression models of teleroentgenographic indicators used in the method of R. M. Ricketts. Primary lateral teleroentgenograms of 38 young men (aged 17-21 years) and 55 young women (aged from 16 to 20 years) with normal occlusion close to orthognathic bite and harmonic face, obtained from the Veraviewepocs 3D device, Morita (Japan), taken from the bank data of research center of National Pirogov Memorial Medical University, Vinnytsya. Cephalometric measurements were performed according to the recommendations of R. M. Ricketts. All indicators were divided into three groups: 1 -metric characteristics of the skull, which usually do not change during surgical and orthodontic treatment; 2 -tooth-jaw indicators, the definition of which most often guided by performing orthodontic manipulations of patients in children and adolescents, as well as those with already formed bone skeleton when orthodontic surgery can change the width, length, angles and position of the bones of the upper and lower jaws; 3 -indicators that characterize the position of each individual tooth relative to each other, to the bony cranial structures and face profile. The regression models of individual teleroentgenographic indicators used in the R.M. Ricketts methodology are constructed using the "Statistica 6.0" licensing package. Constructed all 2 reliable models of the indicators included in the second group (distance Go-CF and Xi-Pm), depending on the indicators of the first group (in young men R 2 = 0.884 and 0.928, and in young women -0.735 and 0.719); as well as in young men, 7 out of 8 possible reliable models (R 2 = 0.568 to 0.887) of the indicators included in the third group (the magnitude of the distances 6u-6l, Overjet, Overbite, 6u-PTV, 1l-APog, 1u-APog and Xi-OcP ) depending on the indicators of the first and second groups; and only 5 models for young women (6u-PTV, 1l-APog, 1u-APog and Xi-OcP distances, and the magnitude of the Max1-APog angle). In the analysis of entering into the regression models of the relevant predictors, it was found that in young men, among the teleroentgenographic indicators of the first group included in the two models of the second group, is the distance P-PTV, and in young women the front length of the base of the skull N-CC and the back of the skull base Ar-Pt It was also found that among young men among the teleroentgenographic indicators of the first and second groups, which were included in the models of the third group, the most frequent is the value of the distance B-Pog (11.1%); while in young women -distance B-Pog (15.6%) and an angle DC-X...

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Section: Discussionmentioning

confidence: 99%

Regression models of individual cephalometric indicators used in the method of R. M. Ricketts

Черныш

2018

Biomed. and Biosoc. Anthrop.

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“…It should be noted that according to our research, most of the cephalometric parameters obtained in Podillia young men and women with orthognathic bite didn't have significant differences with the data of the parameters obtained by G. Shmut [5], C. Stiner [8] and A.M. Schwartz [6]. Numerous differences in the cephalometric parameters used in Charles H. Tweed International Foundation analysis with the results obtained in Ukrainian young men and women with orthognathic bite have been set for angles (regardless of sex, the smaller angles of FMA and POr_OcP and larger IMRA angles values), so and for linear dimensions (larger PFH distances for young men and smaller AFH distances for young women and AFH_PFH ratios for young men and women) [15], as well as almost half of the cephalometric parameters obtained in young men and women from Podillia with orthognathic bite with marked differences in the magnitude of these parameters derived by J. McNamara [14].…”

Section: Discussionmentioning

confidence: 99%

Determination of standard cephalometric parameters using the Downs method for Ukrainian adolescents

Dmitriev

2018

Rep. of Morph.

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The difference in the characteristics of craniofacial structures in different races and ethnicities established in many studies requires the creation of a normative basis for teleroentgenographic indices and indices characteristic for a particular ethnic group. The purpose of the work is to set the cephalometric parameters by W. Downs for young men and women from Podillya region of Ukraine with orthognathic bite and compare the results with the data proposed by the author of the technique. With the device Veraviewepocs 3D device, Morita (Japan), 38 young men (17 to 21 years of age) and 55 young women (aged from 16 to 20 years) with orthognathic bite (normal occlusion close to orthognathic bite) received and analyzed lateral teleroentgenograms. Cephalometric points and measurements were performed in accordance with the recommendations of W. Downs (1948). Anatomical points were determined taking into account recommendations A.E. Athanasiou (1997), S.I. Doroshenko and Y.A. Kulginsky (2007). The statistical processing of the obtained results was carried out in the licensed package “Statistica 6.0” using nonparametric methods for evaluating the obtained results. As a result of the research, virtually no sex differences in cephalometric parameters by W. Downs between adolescents from Podillya with orthognathic bite were found. When comparing the cephalometric parameters obtained by W. Downs from similar figures obtained in Ukrainian young men and women with orthognathic bite, regardless of gender, established significantly lower values of Cant Occlusal Plane (angle POr-DOP) and angle II, as well as significantly higher values were established for angle 1l-DOP, angle 1l-MeGo and distance 1u-APog in Ukrainian young men and women of Podillya. The obtained results indicate the need to create a normative base for cephalometric standards by W. Downs for the population of different regions of Ukraine, taking into account gender and age belonging.

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“…But do there exist unified standards and standards for the planning of profile metric characteristics? With the development of science, more and more researches has been accumulated that proves the existence of statistically significant ethnic, sex [11,24], age and constitutional differences in facial characteristics [1,6,8,[13][14][15]30].…”

Section: Introductionmentioning

confidence: 99%

Determination of individual teleroentgenographic characteristics of the face profile in ukrainian young men and girls with orthognathic bite

Dmitriev

2018

Biomed. and Biosoc. Anthrop.

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Modern dentistry requires the definition of individualized values of teleroentgenographic indicators. To solve such problems, methods of regression and correlation analysis are increasingly used, which help to establish not only the existence of various relationships between the anatomical structures of the head and the parameters of the dento-jaw system, but also allow more accurately predict the change in the contour of soft facial tissue in response to orthodontic treatment. The purpose of the study is to develop mathematical models for the determination of individual teleroentgenographic characteristics of the facial soft tissues by studying the cephalometric indices of young men and women of Ukraine with normal occlusion and balanced faces and conducting a direct stepwise regression analysis. With the use of Veraviewepocs 3D device, Morita (Japan) from 38 young men (17 to 21 years of age) and 55 young women (aged from 16 to 20 years) with occlusal close to the orthognathic bite and balanced faces received side teleroentgenograms. The cephalometric analysis was performed using OnyxCeph³™ licensed software. Cephalometric points and measurements were made according to the recommendations of Downs W. B., Holdway R. A., McNamara J., Schwarz A. M., Schmuth G. P. F., Steiner C. C. and Tweed C. H. With the help of direct stepwise regression analysis, in the licensed package “Statistica 6.0”, regression models of individual teleroentgenographic characteristics of the profile of soft facial tissues were constructed. In young men with normal occlusion close to the orthognathic bite of 19 possible models, 11 were constructed with a determination coefficient from 0.638 to 0.930, and in young women – 12 models with a determination coefficient from 0.541 to 0.927. The conducted analysis of models showed that in young men most often the regression equations included – angle N_POG, parameters of which indicate a linear interjaw relation in the anterior-posterior direction (14.0%); angle GL_SNPOG, or index of convexity of the soft tissue profile (8.8%); MAX maxillary length (7.0%), and GL_SN_S index, which defines vertical correlations in the facial profile (5.3%). The young women most often models included – the angle N_POG (12.5%); angle GL_SNPOG (7.5%); soft tissue front angle P_OR_N (6.25%); the reference angle ML_NL and the profile angle T (by 5.0%); the angle AB_NPOG, the angle NBA_PTGN, which defines the direction of development of the mandible and the distance PN_A (3.75%). Thus, in the work with the help of the method of stepwise regression with inclusion, among Ukrainians of adolescence age, based on the characteristics of teleroentgenographic indicators, reliable models of individual teleroentgenographic characteristics of the profile of soft facial tissues were developed and analyzed.

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Determination of Normal Cephalometric Parameters by J. McNamara Method for Ukrainian Boys and Girls

Cited by 11 publications

References 6 publications

Regression models of individual cephalometric indicators used in the method of R. M. Ricketts

Regression models of individual cephalometric indicators used in the method of R. M. Ricketts

Determination of standard cephalometric parameters using the Downs method for Ukrainian adolescents

Determination of individual teleroentgenographic characteristics of the face profile in ukrainian young men and girls with orthognathic bite

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