University of Oulu

Heini Turtinen, Millamari Sarja, Jussi Hyvärinen, Paavo Pirhonen, Paula Pesonen, Pertti Pirttiniemi & Anna-Sofia Silvola (2021) Associations between Bolton ratio and overjet deviations in a Finnish adult population, Acta Odontologica Scandinavica, 79:8, 593-599, DOI: https://doi.org/10.1080/00016357.2021.1918348

Associations between Bolton ratio and overjet deviations in a Finnish adult population

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Author: Turtinen, Heini1; Sarja, Millamari1; Hyvärinen, Jussi1;
Organizations: 1Department of Oral Development and Orthodontics, Oral Health Sciences, Faculty of Medicine, University of Oulu, Finland
2Infrastructure for Population Studies, Faculty of Medicine, University of Oulu, Finland
3Department of Oral Development and Orthodontics, Oral Health Sciences, Faculty of Medicine, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.3 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2021120959734
Language: English
Published: Informa, 2021
Publish Date: 2021-12-09
Description:

Abstract

Objective: To determine the anterior Bolton ratio for a Finnish adult population and to investigate its associations with overjet.

Material and methods: This study is part of the Northern Finland Birth Cohort 1966. Clinical oral investigations, including three-dimensional intraoral scanning and registration of occlusion, were performed in connection with the 46-year follow-up for 1,961 subjects. Subjects with normal occlusion (n = 149), extreme overjet ≥ 8 mm (n = 49), large overjet 6–7 mm (n = 86), and negative overjet (n = 16) and no orthodontic treatment history were selected for further analysis. The mesiodistal widths were measured from canine to canine to evaluate the anterior Bolton ratio.

Results: A mean anterior Bolton ratio of 78.6 (SD 3.1) was found for the normal occlusion group. Subjects with extreme overjet had smaller Bolton ratios compared to the normal occlusion group and the negative overjet group (p = .005, p = .019, respectively). Overjet deviations were associated with upper canine and incisor widths.

Conclusions: The mean anterior Bolton ratio in subjects with normal occlusion was larger compared to the original Bolton ratio. Tooth size discrepancy was associated with extreme and negative overjet at population level.

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Series: Acta odontologica Scandinavica
ISSN: 0001-6357
ISSN-E: 1502-3850
ISSN-L: 0001-6357
Volume: 79
Issue: 8
Pages: 593 - 599
DOI: 10.1080/00016357.2021.1918348
OADOI: https://oadoi.org/10.1080/00016357.2021.1918348
Type of Publication: A1 Journal article – refereed
Field of Science: 313 Dentistry
3142 Public health care science, environmental and occupational health
Subjects:
Copyright information: © 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group on behalf of Acta Odontologica Scandinavica Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.
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