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Bolton ratios in Portuguese subjects among different malocclusion groups

2018-09Journal article Open access
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dc.contributor.authorMachado, Vanessa
dc.contributor.authorBotelho, João
dc.contributor.authorPereira, Dinis
dc.contributor.authorVasques, Mariana
dc.contributor.authorFernandes-Retto, Paulo
dc.contributor.authorProença, Luís
dc.contributor.authorMendes, José João
dc.contributor.authorDelgado, Ana
dc.date.accessioned2019-11-18T12:41:29Z
dc.date.available2019-11-18T12:41:29Z
dc.date.issued2018-09
dc.description.abstractBACKGROUND: Several methods have been described to estimate inter-arch tooth size relationship, such as Bolton's ratios. The aims of this study were to verify the validity of Bolton indexes in a sample of untreated Portuguese subjects based on Angle classification and to evaluate the gender difference. MATERIAL AND METHODS: 168 pre-treatment dental casts of orthodontics Portuguese subjects (59 males and 109 females) with different occlusions were used, which were selected randomly from 541 consecutively treated orthodontic patients. The mesiodistal widths from first molar to first molar were measured on each pre-treatment cast to the nearest 0.01 mm using digital caliper, and Bolton's anterior and overall ratios were calculated. Descriptive statistics as mean, standard deviation and range were calculated. Moreover, the results were compared to Bolton's ratios and differences based on gender and occlusion groups were evaluated by statistical inference methods. RESULTS: The results reveal that the mean values, standard deviation and range were larger than Bolton's in normal occlusion group (78.3±3.5% in anterior ratio and 92.1±2.2% in overall ratio) and there were no differences between genders (p >0.05). Class I (anterior and overall ratios, p=0.001 and p<0.001, respectively), Class II/2 (anterior ratio, p=0.032) and Class III (overall ratio, p=0.041) were significantly different from Bolton's reference data. CONCLUSIONS: The results showed no differences between gender and no difference between normal occlusion and malocclusion groups. Moreover, in normal occlusion group, the anterior and overall tooth size ratios was equivalent to the original Bolton's ratios, although the mean and standard deviation were large.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMachado V, Botelho J, Pereira D, Vasques M, Fernandes-Retto P, Proença L, Mendes JJ, Delgado A. Bolton ratios in Portuguese subjects among different malocclusion groups. J Clin Exp Dent. 2018 September 1;10(9):e864-e868. doi: 10.4317/jced.54977pt_PT
dc.identifier.doi10.4317/jced.54977pt_PT
dc.identifier.issn1989-5488
dc.identifier.urihttp://hdl.handle.net/10400.26/30178
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMedicina Oralpt_PT
dc.relation.publisherversionhttp://dx.doi.org/10.4317/jced.54977pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectBolton anterior and overall ratiospt_PT
dc.subjectNormal occlusionpt_PT
dc.subjectMalocclusionpt_PT
dc.subjectPortuguese populationpt_PT
dc.titleBolton ratios in Portuguese subjects among different malocclusion groupspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPagee868pt_PT
oaire.citation.startPagee864pt_PT
oaire.citation.titleJournal of Clinical and Experimental Dentistrypt_PT
oaire.citation.volume10(9)pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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