employee
Galaxy Beauty Institute (LLC «Arctur») (orthodontist)
employee
Moscow, Moscow, Russian Federation
First St. Petersburg State Medical University named after. acad. I. P. Pavlova (Department of Orthopedic Dentistry and Materials Science with a Course in Adult Orthodontics, Professor of the Department)
Saint Petersburg, St. Petersburg, Russian Federation
employee
First Saint Petersburg State Medical University named after academician I.P. Pavlov (Prosthodontics and Material Science Department with the Course of Orthodontics of adults, assistant)
employee
Veliky Novgorod, Nizhny Novgorod, Russian Federation
employee
Nizhny Novgorod, Nizhny Novgorod, Russian Federation
UDC 616.31
Relevance of the studying of principles of orthodontic braces positioning is determined by increased demands of patients on aesthetic treatment results. The research is aimed at studying the influence of the height of orthodontic braces positioning on the aesthetics of smile line, which is a significant aspect of modern orthodontics. The aim of the study was to evaluate the effect of various methods of braces positioning on the smile line. Materials and methods. The study involved 56 people aged 18 to 45 years with class I occlusion and normal overjet. The main diagnostic method was the analysis of photographs of patients' dentition and faces according to M. Fradeani, which help to determine the upper lip position relative to the upper front teeth. Results and discussion. The pairwise comparison of the values of extrusion and intrusion of the upper front teeth in groups 1 and 2 revealed a predominance of extrusion using TOM×TOM method in comparison with others. The degree of extrusion of the anterior teeth in groups 1 and 2 by MBT method was lower compared to patients who used the TOM×TOM method, but prevailed over the indicators with the Roth and Alexander methods. For individuals with complete overlap of the dental crowns and those with gum visualization of more than 2 mm (groups 3 and 4), extrusion of the anterior teeth was noted to a greater extent with TOM×TOM and MBT methods, but to a lesser extent with Roth and Alexander methods. In addition, the use of Roth and Alexander methods differ in the predominance of intrusion values: lateral incisor (Alexander method), central and lateral incisor (Roth method) in comparison with other methods, and therefore the use of these methods of braces fixation is recommended in patients of groups 3 and 4. Conclusion. To create an attractive smile line, it is necessary to use various methods of braces positioning, depending on the initial type of the patient's smile. The data obtained make a contribution to the development of orthodontics, suggesting an algorithm for fixing braces in patients with different types of smiles.
orthodontics, orthodontic bracket (bracket system), smile line, M. Fradeani smile analysis, bracket positioning methods
1. Dudnik O.V., Mamedov A.A., Dybov A.M., Harke V.V. Primenenie sistemy kriteriev ortodonticheskogo lecheniya (The American Board of orthodontics (ABO)) v kachestve antropometricheskogo issledovaniya. Zdorov'e i obrazovanie v XXI veke. 2016;18(12):17-22. [Dudnik O.V., Mamedov Ad.A., Dybov A.M., Kharke V.V. Application of criteria orthodontic treatment (The American Board of orthodontics (ABO)) by way of anthropometric research. Health & education millennium. 2016;18(12):17-22. (In Russ.)]. https://elibrary.ru/item.asp?id=27663158
2. Proffit U.R. Sovremennaya ortodontiya. 4-e izd. Moskva: MEDpress-inform; 2017. 560 s. [Proffit W.R. Contemporary Orthodontics. 4th ed. Moscow: MEDpress-inform; 2017. 560 p. (In Russ.)].
3. Ivanov S.Yu., Tuturov N.S., Bulycheva E.A., Hromenkova K.V., Luk'yanova E.A., Bulycheva D.S. i dr. Analiz naklona okklyuzionnoy ploskosti u pacientov s distal'nym i mezial'nym prikusom. Institut stomatologii. 2022;(3):44-45. [Ivanov S.Yu., Tuturov N.S., Bulycheva E.A., Hromenkova K.V., Luk'yanova E.A., Bulycheva D.S. et al. Analysis of the occlusal plane inclination inpatients with class II and class III malocclusions. Institut stomatologii. 2022;(3):44-45. (In Russ.)]. https://elibrary.ru/item.asp?id=49483801
4. Tihonov A.V. Mify o sisteme Damon. Sankt-Peterburg; 2017. 25 s. [Tikhonov A.V. Myths about Damon System. Saint Petersburg; 2017. 25 p. (In Russ.)].
5. De Lima D.V., Freitas K.M.S. Vertical bracket positioning using the marginal ridge as reference. Journal of clinical orthodontics. 2020;52(5):284-293.
6. Hamdan A.M., Lewis S.M., Kelleher K.E., Elhady S.N., Lindauer S.J. Does overbite reduction affect smile esthetics? The Angle orthodontist. 2019;89(6):847-854. https://doi.org/10.2319/030819-177.1
7. Melo M., Ata-Ali J., Ata-Ali F., Bulsei M., Grella P., Cobo T. et al. Evaluation of the maxillary midline, curve of the upper lip, smile line and tooth shape: a prospective study of 140 Caucasian patients. BMC Oral Health. 2020;20(1):42. https://doi.org/10.1186/s12903-020-1031-y
8. Kishor F.K.K., Jain D., Pandit S.K., Kharbanda R., Trivedy P., Gupta E. Three Dimensional Evaluation of Accuracy of Bracket Positioning. Journal of Pharmacy and Bioallied Sciencesi. 2023;15(Suppl 2):S1188-S1191. https://doi.org/10.4103/jpbs.jpbs_167_23
9. Pitts T.R. Bracket Positioning for Smile Arc Protection. Journal of clinical orthodontics. 2017;51(3):142-156. https://www.jco-online.com/media/29860/2017_03_142_pitts.pdf
10. Thomas A.A., Sivakumar A. An evaluation of the accuracy of bracket positioning with and without loupes using 3Shape Ortho Analyzer software. Journal of Taibah University Medical Sciences. 2022;18(1):98-103. https://doi.org/10.1016/j.jtumed.2022.08.010
11. Aboujaoude R., Kmeid R., Gebrael C., Amm E. Comparison of the accuracy of bracket positioning between direct and digital indirect bonding techniques in the maxillary arch: a three-dimensional study. Progress in orthodontics. 2022;23(1):31. https://doi.org/10.1186/s40510-022-00426-3
