Tooth-size discrepancy and Bolton's ratios: a literature review

Journal of Orthodontics
Siti Othman, Nigel Harradine

Abstract

To review the literature on Bolton's tooth-size discrepancies (TSD) with specific attention to the prevalence of TSD, and the possible influence of different classes of malocclusion, gender and racial group. Also examined were the validity of the standard deviations from Bolton's samples as an indicator of significant TSD, methods of measurement of TSD and their reproducibility. Based on the review, suggestions are made as to how future work could be improved. Studies have reported from 20 to 30% of people with significant tooth-size anterior discrepancies and 5-14% for overall TSD. Bolton's original sample was appropriate for indicating what ratio is most likely to be associated with an excellent occlusion, but was not suited to indicating the size or prevalence of significant TSD. Most studies use samples that are not likely to be representative of orthodontic patients in the UK or, indeed, elsewhere. Although some statistically significant differences have been reported, gender and racial group seem unlikely to have a clinically significant influence on Bolton's tooth-size ratios. Class III malocclusions may have larger average ratios. Computerized methods of measurement are significantly more rapid. Most studies performed o...Continue Reading

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Citations

Jul 8, 2008·European Journal of Orthodontics·Iyad K Al-OmariAhmed M Hamdan
Apr 3, 2009·European Journal of Orthodontics·Mihovil StrujićMladen Slaj
Sep 5, 2009·European Journal of Orthodontics·Hüsamettin Oktay, Esengül Ulukaya
Dec 19, 2009·European Journal of Orthodontics·Barbara Wedrychowska-SzulcPiotr Stepień
Nov 5, 2008·Journal of Periodontology·Liran LevinEli E Machtei
Jul 4, 2007·The Angle Orthodontist·Siti Othman, Nigel Harradine
Oct 13, 2010·The Angle Orthodontist·Gerard O'MahonyMichael S Cronin
Dec 2, 2011·Journal of Indian Prosthodontic Society·C L Satish BabuM S Rani
Sep 13, 2016·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Andrew Hanna, Edward Ellis
May 4, 2011·Brazilian Oral Research·Somchai Manopatanakul, Narumon Watanawirun
Jan 8, 2008·Brazilian Dental Journal·Sheila Medina FreireMarco Antonio Almeida
Apr 19, 2018·The Angle Orthodontist·Yu HikitaRyosuke Kimura
Nov 14, 2019·Journal of Orthodontics·Vanessa MachadoAna Delgado
Aug 8, 2019·Dental press journal of orthodontics·Telma Martins de Araújo, Luciana Duarte Caldas
Jun 13, 2015·The Journal of Contemporary Dental Practice·Mohammad Khursheed AlamMohammed Saifuddin
Apr 27, 2021·Acta Odontologica Scandinavica·Heini TurtinenAnna-Sofia Silvola

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