Applicability of bolton’s tooth size ratios in mediterranean, japanese and japanese-brazilian populations
Objective: The aim of this study was to determine if Bolton’s tooth size ratios can be applied to Mediterranean, Japanese and Japanese-Brazilian populations. Materials and methods: The sample comprised 90 pairs of dental casts of untreated individuals with normal occlusion, divided into 3 groups according to ethnical characteristics: White (30 Mediterranean descendant subjects, with a mean age of 13.64 years), Japanese (30 subjects with Japanese ancestry, with a mean age of 15.63 years) and Japanese-Brazilian (30 Japanese-Brazilian subjects, with a mean age of 13.96 years). A digital caliper was used to measure the maxillary and mandibular mesiodistal widths from first molar to first molar on each dental cast. The anterior and overall tooth size ratios were calculated. T test was applied for comparisons between Bolton standards and the ethnical groups for anterior and overall ratios. Results: Only the Japanese-Brazilian group showed significantly greater ratios than Bolton standards. Conclusion: It was concluded that Bolton’s ratios are not applicable to the Japanese-Brazilian population. Therefore, it is suggested that Bolton’s ratios may not be suitable for different populations.
Tadesse P, Zhang H, Long X, Chen L. A clinical analysis of tooth size discrepancy (Bolton index) among orthodontic patients in Wuhan of Central China. J Huazhong Univ Sci Technolog Med Sci. 2008 Aug;28(4):491-4. doi: 10.1007/s11596-008-0427-8.
Bolton WA. The clinical application of a tooth-size analysis. Am J Orthod. 1962 Jul;48(7):504-29.
Freeman JE, Maskeroni AJ, Lorton L. Frequency of Bolton tooth-size discrepancies among orthodontic patients. Am J Orthod Dentofacial Orthop. 1996 Jul;110(1):24-7.
Bailey E, Nelson G, Miller AJ, Andrews L, Johnson E. Predicting tooth-size discrepancy: A new formula utilizing revised landmarks and 3-dimensional laser scanning technology. Am J Orthod Dentofacial Orthop. 2013 Apr;143(4):574-85. doi: 10.1016/j.ajodo.2012.09.022.
Pizzol KEDC, Gonçalves JR, Santos-Pinti A, Peixoto AP. Bolton analysis: an alternative proposal for simplification of its use. Dental Press J Orthod. 2011 Nov-Dec;16(6):68-77. doi: 10.1590/S217694512011000600012.
Smith SS, Buschang PH, Watanabe E. Interarch tooth size relationships of 3 populations: "does Bolton's analysis apply?". Am J Orthod Dentofacial Orthop. 2000 Feb;117(2):169-74.
Endo T, Shundo I, R. A, Ishida K, Yoshino S, Shimooka S. Applicability of Bolton’s tooth size ratios to a Japanese orthodontic population. Odontology. 2007 Jul;95(1):57-60.
Paredes V, Williams FD, Cibrian R, Williams FE, Meneses A, Gandia JL. Mesiodistal sizes and intermaxillary tooth-size ratios of two populations; Spanish and Peruvian. A comparative study. Med Oral Patol Oral Cir Bucal. 2011 Jul 1;16(4):e593-9.
Fernandes TM, Sathler R, Natalicio GL, Henriques JF, Pinzan A. Comparison of mesiodistal tooth widths in Caucasian, African and Japanese individuals with Brazilian ancestry and normal occlusion. Dental Press J Orthod. 2013 May-Jun;18(3):130-5.
Nourallah AW, Splieth CH, Schwahn C, Khurdaji M. Standardizing interarch tooth-size harmony in a Syrian population. Angle Orthod. 2015 Jul-Sep;4(3):77-82. doi: 10.4103/2278-0203.160240.
Abdalla Hashim AH, Eldin AH, Hashim HA. Bolton tooth size ratio among Sudanese Population sample: A preliminary study. J Orthod Sci. 2015 Jul-Sep;4(3):77-82. doi: 10.4103/2278-0203.160240.
Uysal T, Sari Z. Intermaxillary tooth size discrepancy and mesiodistal crown dimensions for a Turkish population. Am J Orthod Dentofacial Orthop. 2005 Aug;128(2):226-30.
Subbarao VV, Regalla RR, Santi V, Anita G, Kattimani VS. Interarch tooth size relationship of Indian population: does Bolton's analysis apply? J Contemp Dent Pract. 2014 Jan;15(1):103-7.
Burhan AS, Nawaya FR. Prediction of unerupted canines and premolars in a Syrian sample. Prog Orthod. 2014 Jan 6;15:4. doi: 10.1186/21961042-15-4.
Wedrychowska-Szulc B, Janiszewska-Olszowska J, Stepien P. Overall and anterior Bolton ratio in Class I, II, and III orthodontic patients. Eur J Orthod. 2010 Jun;32(3):313-8. doi: 10.1093/ejo/cjp114.
Kachoei M, Ahangar-Atashi MH, Pourkhamneh S. Bolton's intermaxillary tooth size ratios among Iranian schoolchildren. Med Oral Patol Oral Cir Bucal. 2011 Jul;16(4):e568-72.
Kumar P, Singh V, Sharma P, Sharma R. Effects of premolar extractions on Bolton overall ratios and tooth-size discrepancies in a north Indian population. J Orthod Sci. 2013 Jan;2(1):23-7. doi: 10.4103/22780203.110329.
Alam MK, Shahid F, Purmal K, Ahmad B, Khamis MF. Bolton tooth size ratio and its relation with arch widths, arch length and arch perimeter: a cone beam computed tomography (CBCT) study. Acta Odontol Scand. 2014 Nov;72(8):1047-53. doi: 10.3109/00016357.2014.946967.
Alam MK, Iida J. Overjet, overbite and dental midline shift as predictors of tooth size discrepancy in a Bangladeshi population and a graphical overview of global tooth size ratios. 2013 Nov;71(6):1520-31. doi: 10.3109/00016357.2013.775336.
Tsai PL, Hsu JW, Lin LM, Liu KM. Logistic analysis of the effects of shovel trait on Carabelli's trait in a Mongoloid population. Am J Phys Anthropol. 1996 Aug;100(4):523-30.
Kimura R, Yamaguchi T, Takeda M, Kondo O, Toma T, Haneji K, et al. A common variation in EDAR is a genetic determinant of shovel-shaped incisors. Am J Hum Genet. 2009 Oct;85(4):528-35. doi: 10.1016/j. ajhg.2009.09.006.
Rudolph DJ, Dominguez PD, Ahn K, Thinh T. The use of tooth thickness in predicting intermaxillary tooth-size discrepancies. Angle Orthod. 1998 Apr;68(2):133-8; discussion 139-40.
Halazonetis DJ. The Bolton ratio studied with the use of spreadsheets. Am J Orthod Dentofacial Orthop. 1996 Feb;109(2):215-9.
Bernabe E, Major PW, Flores-Mir C. Tooth-width ratio discrepancies in a sample of Peruvian adolescents. Am J Orthod Dentofacial Orthop. 2004 Mar;125(3):361-5.
Singh S, Hlongwa P, Khan MI. Bolton ratios in a sample of black South Africans. SADJ. 2011 Aug;66(7):336-9.
The Brazilian Journal of Oral Sciences uses the Creative Commons license (CC), thus preserving the integrity of the articles in an open access environment.