Asymmetric Changes in Shape of Anterior Teeth - Dental Esthetics
Authors:
P. Kowalski; M. Kamínek
Authors place of work:
Klinika zubního lékařství LF UP a FN, Olomouc
Published in the journal:
Česká stomatologie / Praktické zubní lékařství, ročník 113, 2013, 3, s. 32-40
Category:
Original Article – Analytical Study
Věnováno odb. as. MUDr. Magdaleně Koťové, Ph.D., k životnímu jubileu
Summary
Introduction, Aim:
The esthetic dentition is a substantial part contributing to the overall face esthetics. The shape of anterior teeth which are visible in a smile is an important aspect of the esthetic perception. The aim of the presented study was to determine the impact of the shape and size of particular anterior teeth on dental esthetics.
Methods:
A photograph of a young woman‘s mouth 9×13 cm (base) with an attractive smile and regular dentition was modified in the software Adobe Photoshop CS5. With this software different varieties of the same smile were produced, involving only a one-sided adjustment of shape and size of crowns of upper central and lateral incisors and upper canines. One shape was selected for central incisor, lateral incisor and canine. There were prepared 23 photographs with asymmetrical changes. The photographs were evaluated by three groups of evaluators: dentists, orthodontists and laymen. Each evaluator filled in a questionnaire in which expressed his/her perceived level of attractiveness for each photograph by marking a point in a linear scale between „0 = least” and „5 = most attractive”. The distance from 0 to the mark was recorded and then expressed in per cents.
Results:
The average evaluation of the smile in all 25 photographs was 32% in case of dentists (SD 22), 42% in case of orthodontists (SD 27) and 50% in case of laymen (SD 28). The least esthetic shape evaluation was a square shape with a flat incisal edge of central incisors widened by 2 mm, by 1.5 mm and narrowed by 2 mm opposite to the initial. The most esthetic shape of central incisor is considered a harmonious shape with rounded angles. In case of lateral incisors the least esthetic shape was widened by 2 mm, narrowed by 2 mm. The most esthetic is shape of sharp mesial angle, rounded distal part, widened by 0.5 mm, by 1 mm and narrowed by 0.5 mm.
Conclusion:
All evaluators considered the harmonious shape with rounded angles and the shape of sharp mesial angle, rounded distal part in the lateral incisor as a most esthetic. The shape of lateral incisors widened by 0.5 mm or by 1 mm is considered esthetic. The shape widened by 2 mm was considered as an unaesthetic. When planning an orthodontic treatment it is necessary to consider the shape of teeth and their possible adjustment (recountouring, prosthetic adjustment with veneer/crown).
Key words:
dental esthetics – shape of upper incisors – size of upper incisors – shape of upper canines
Zdroje
1. Anderson, K. M., Behrents, R. G., McKinney, T., Buschang, P. H.: Tooth shape preferences in a esthetics smile. Am. J. Orthod. Dentofacial Orthop., roč. 128, 2005, č. 4, s. 458–465.
2. Bell, R. A: The geometric theory of selection of artificial teeth. J. Am. Dent. Assoc., roč. 94, 1978, č. 4, s. 637–640.
3. Brisman, A. S: Esthetics: a comparison of dentist’s and patient’s concepts. J. Am. Dent. Assoc., roč. 100, 2000, s. 345–-352.
4. Brodbelt, R. H. W., Walker, G. F., Nelson, D., Seluk, L. W.: A comparison of face shape with tooth form. J. Prosthet. Dent., roč. 52, 1984, s. 588–592.
5. Frush, J. P., Fischer, R. D.: Introduction to dentogenetic restorations. J. Prosthet. Dent., roč. 5, 1955, s. 586–595.
6. Heravi, F., Rashed, R., Abachizadeh, H.: Esthetic preferences for the shape of anterior teeth in a posed smile. Am. J. Orthod. Dentofacial Orthop., roč. 139, 2011, č. 6, s. 806–814.
7. Johnston, C. D., et al.: The influence of dental to facial midline discrepancies on dental attractiveness ratings. Eur. J. Orthod., roč. 21, 1999, č. 5, s. 517–522.
8. Kokich, V. G., Spear, F. M. , Kokich, V. O. jr.: Poprawa estetyki zębów przednich: podejście interdyscyplinarne. Ortodoncja Współczesna, roč. 5, 2003, č. 1, s. 4–13.
9. Kokich, V. O., Kiyak, H. A., Shapiro, P. A.: Comparing the perception of dentists and lay people to altered dental esthetics. J. Esth. Dent., roč. 11, 1999, č. 6, s. 311–324. Cit in: Musilová, L.: Vnímání některých odchylek v estetice frontálního úseku laiky. Ortodoncie, roč. 15, 2006, č. 4, s. 39–49.
10. Kowalski, P., Kamínek, M.: Vliv tvaru frontálních zubů na estetiku chrupu. Ortodoncie, roč. 21, 2012, č. 1, s. 28–36.
11. Krug, J.: Hodnocení estetiky náhrady horních frontálních zubů s využitím objektivních kritérií. LKS, roč. 21, 2011, č. 12, s. 246–-257.
12. Lombardi, R. E.: The principles of visual perception and their clinical application to denture esthetics. J. Prosth. Dent., roč. 29, 1973, s. 358–382.
13. Mack, M. R.: Vertical dimension : A dynamic concept based on facial form and oropharyngeal function. J. Prosth. Dent. roč. 66, 1991, s. 478–485.
14. Marunick, M. T., Chamberlain, B. B.; Robin, C. A.: Denture esthetics: an evolution of layman’s preferences. J. Oral Rehabil., roč. 10, 1993, s. 399–406.
15. Młynarska, U.: Projektowanie uśmiechu. Nowoczesny technik dentystyczny. 2010, č. 6, s. 49–51.
16. Musilová, L.: Vnímání některých odchylek v estetice frontálního úseku laiky. Ortodoncie, roč. 15, 2006, č. 4, s. 39–49.
17. Nanda, R., Burstone, C. J.: JCO interviews: part 1. Facial esthetics. J. Clin. Orthod., roč. 41, 2007, s. 79–87.
18. Nelson, S., Ash, M.: Wheeler’s dental anatomy, physiology, and occlusion. 9th ed. Philadelphia, Saunders, 2010.
19. Peck, S., Peck, L., Kataja, M.: Some vertical lineaments of lip position. Am. J. Orthod., roč. 101, 1992, č. 6, s. 519–524.
20. Pound, E.: Applying harmony in selecting and arranging teeth. Dent. Clin. North Am., 1962, s. 241–258.
21. Sarver, D. M.: The importance of incisor positioning in the esthetic smile: the smile arc. Am. J. Orthod. Dentofacial Orthop., roč. 120, 2001, č. 2, s. 98–111.
22. Sarver, D.bM.: Principles of cosmetic dentistry in orthodontics : part 1. Shape and proportionality of anterior teeth. Amer. J. Orthodont. Dentofacial Orthop., roč. 126, 2004, č. 6, s. 749–753.
23. Seluk, L., Brodbelt, R., Walker, G.: A biometric comparison of face shape with denture form. J. Oral Rehabil., roč. 14, 1987, s. 139–145.
24. Shaw, W. C., Rees, G., Dawe, M., Charles, C. R.: The influence of dentofacial appearance on the social attractiveness of young adults. Am. J. Orthod., roč. 87, 1985, č. 1, s. 21–26.
25. Tjan, A. H., Miller, G. D.: The JGP: some esthetic factors in a smile. J. Prosth. Dent., roč. 51, 1984, s. 24–28.
26. Vig, R. G., Brundo, G. C.: The kinetics of anterior tooth display. J. Prosth. Dent., roč. 39, 1978, s. 502–504.
27. Vinklárková, M., Kotas, M.: Poměr šířek horních frontálních zubů – pravidlo zlatého řezu? Ortodoncie, roč. 19, 2010, č. 2, s. 36–46.
28. Williams, J. L.: A new classification of human tooth forms with special reference to a new system of artificial teeth. Dent. Cosmos, roč. 56, 1914, s. 627–628.
29. Zachrisson, B. U.: Esthetic factors involved in anterior tooth display and the smile: vertical dimension. J. Clin. Orthod., roč. 32, 1998, č. 7, s. 432–445.
Štítky
Maxillofacial surgery Orthodontics Dental medicineČlánok vyšiel v časopise
Czech Dental Journal
2013 Číslo 3
- What Effect Can Be Expected from Limosilactobacillus reuteri in Mucositis and Peri-Implantitis?
- The Importance of Limosilactobacillus reuteri in Administration to Diabetics with Gingivitis
Najčítanejšie v tomto čísle
- Negative Pressure in the Treatment of Odontogenic Inflammation
- Asymmetric Changes in Shape of Anterior Teeth - Dental Esthetics
- An Overview of Recent Possibilities in Pharmacotherapy of Diseases of the Oral Mucosa, Salivary Glands, and Periodontal Tissue
- Study of Cytokine Production in a Tisssue Culture of Human Macrophages Stimulated by Metal Ions