Bolton s intermaxillary tooth size ratios among Iranian schoolchildren

Kachoei, Mojgan; Ahangar-Atashi, Mohammad-Hosein; Pourkhamneh, Sohrab

doi:10.4317/medoral.16.e568

Cited by 13 publications

(13 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(12) A study by Kachoei et al in Tabriz in 2011 showed no significant difference between the teeth measurements on two sides of the dental arches (left and right). (13) In our study, symmetrical values were greater than asymmetrical values, which shows the slight difference in the dimensions of the teeth size ratios.…”

Section: Resultscontrasting

confidence: 42%

Evaluating the Symmetry of Permanent Teeth Dimensions on Two Sides of Dental Arches with Different Occlusions and Related Factors

Kaviani

Mackinejad

Takromi³

et al. 2018

J Res Dentomaxillofac Sci

View full text Add to dashboard Cite

Background and Aim:Considering the importance of teeth dimensions in their adequacies and aesthetics, their significant racial differences, and various statistics regarding the dimensions of symmetrical teeth in previous articles, we aimed to evaluate the dimensions of symmetrical permanent teeth on two sides of the maxillary and mandibular dental arches and related factors in different occlusions of students and patients of Islamic Azad Dental University of Tehran. Materials and Methods: This cross-sectional study was conducted on 210 people. A dental cast was made for each individual. The mesiodistal, labiolingual, and occlusogingival dimensions of the clinical crowns were measured using a caliper with the accuracy of 0.1 mm along with their adaptation and symmetry on two sides of the maxillary and mandibular dental arches and related factors. Data were analyzed using Chi-square test. Results: 67.1% of the patients were females and 32.9% were males. There were 69.3% symmetric and 30.7% asymmetric cases; there were no significant differences in terms of the dimensions, gender, and jaws (P<0.8). Regarding teeth types and variations in maxillary and mandibular central incisors, symmetrical values were 10.3%, while non-symmetrical values were 31.3%. Asymmetrical values in central incisors of both dental arches were significantly greater than symmetrical values. Conclusion: It seems that on the left and right sides of both dental arches of permanent teeth in both genders, symmetrical values are greater than asymmetrical values. Asymmetrical values in central incisors of both arches were significantly greater than symmetrical values.

show abstract

Section: Resultscontrasting

confidence: 42%

Evaluating the Symmetry of Permanent Teeth Dimensions on Two Sides of Dental Arches with Different Occlusions and Related Factors

Kaviani

Mackinejad

Takromi³

et al. 2018

J Res Dentomaxillofac Sci

View full text Add to dashboard Cite

show abstract

“…Moreover, two articles were excluded (Kachoei et al, 2011; Poosti and Jalali, 2007) due to abnormal SD values (10 and 100 times lower than the mean value of SD presented in the remaining studies, respectively) (Supplements S7–S10). These unusual SD values frame narrow confidence intervals (CIs) gaining unreasonable weight in the meta-analysis.…”

Section: Resultsmentioning

confidence: 99%

“…Strategies to minimise the potential sources of bias were not clearly described in most articles. Twelve articles fail to explain how they evaluated intra- and/or inter-examiner errors or random error determination (Anil and Monika, 2010; Devi et al, 2017; Kachoei et al, 2011; Kansal et al, 2012; Kumar et al, 2015; Lee et al, 2011; Mirzakouchaki et al, 2007; Mollabashi et al, 2019; Mulimani et al, 2018; Poosti and Jalali, 2007; Škrinjarić et al, 2018; Subbarao et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

A systematic review and meta-analysis on Bolton’s ratios: Normal occlusion and malocclusion

Machado¹,

Botelho²,

Mascarenhas³

et al. 2019

J Orthod

View full text Add to dashboard Cite

Introduction: The purpose of this study was to seek and summarise the Bolton overall index (OI) and anterior index (AI) regarding normal occlusion and Angle’s malocclusion according to gender, and to assess if these indices support Bolton’s standards as general references. Methods: PubMed, LILACS, Embase, CENTRAL and Google Scholar databases were searched up to June 2019 (CRD42018088438). Non-randomised clinical studies, published in English and assessing Bolton’s OI and/or AI in normal occlusion and Angle’s malocclusion groups, were included. OI and AI means, sample size and SDs were collected. The National Heart, Lung, and Blood Institute’s Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies was used to assess the risk of bias. Pairwise random-effects and multilevel Bayesian network meta-analyses were used to synthesise available data. Results: Fifty-three observational studies were included (11,411 participants; 3746 men, 4430 women; 15 studies lacked gender information). For normal occlusion, pooled estimates for OI and AI means were 91.78% (95% confidence interval [CI] = 91.42–92.14; I2 = 92.87%) and 78.25% (95% CI = 77.87–78.62; I2 = 90.67%), respectively. We could identify in Angle’s Class III patients meaningful OI and AI mean deviations from normal occlusion (0.76, 95% credible interval [CrI] = 0.55–0.98 and 0.61, 95% CrI = 0.35–0.87, respectively), while in Class II patients we found a meaningful mean deviation from normal occlusion only for OI (−0.28, 95% CrI = −0.52–−0.05). Concerning gender impact, male patients presented higher OI (0.30, 95% CI = 0.00–0.59) and AI (0.41, 95% CI = 0.00–0.83) mean values than female patients in Class I. Conclusion: Normal occlusion OI and AI mean values differ from Bolton’s original values. Class II division 2, for OI mean values, and Class III, for both OI and AI, are proportionally larger than normal occlusion patients. Gender had almost no impact on teeth mesiodistal proportion.

show abstract

“…The ABI and TBI among Tabrizian school children were 78.10± 0.28 and 92.24±0.21, respectively. There was no statistically significant difference with Bolton’s standard indices ( 11 ). Another study in an Iranian-Azari population stated the similar tooth size ratios to the original ratios of an American population, without any gender specificity ( 12 ).…”

Section: Introductionmentioning

confidence: 73%

“…Anterior and total Bolton index values are not similar in different populations ( 3 , 7 – 10 ). Some Iranian studies presented the mean values of Bolton indices for local populations ( 11 – 13 ). This study tried to provide the prevalence of clinically significant TSD beyond 2SDs of Bolton’s means for an Iranian population and also to establish a scientific approval of the reliability of the visual judgment of TSD, if possible.…”

Section: Discussionmentioning

confidence: 99%

Bolton discrepancy in an Iranian population and its relation with maxillary lateral incisors’ size

Ajami¹,

Fattahi²,

Zare³

et al. 2018

Electron Physician

View full text Add to dashboard Cite

BackgroundBolton’s two main ratios describing the proportional size of upper and lower teeth, could contribute to estimating the excess or deficiency of tooth size necessary to obtain an ideal occlusion. However, the mean Bolton values are not the same among different societies. Determining the prevalence of tooth size deviations from population-specific Bolton indices might help local orthodontists to have a more concise treatment plan.ObjectiveThe study aimed to define the prevalence of clinically significant tooth size discrepancies (TSD) in an Iranian population and to evaluate the influence of lateral incisors’ size on this discrepancy.MethodsThis cross-sectional study was conducted on study casts of orthodontic patients attending Imam Reza Dental Clinic from September 2008 to December 2016. The sample comprised of 150 randomly selected pre-treatment study casts (64 males and 86 females from 17 to 28). The mesiodistal diameter of all permanent teeth from the first molar on the right to the first molar on the left was measured using 2 similar digital calipers, and Bolton analysis was calculated. Subjective visual estimation of Bolton discrepancy was also performed. SPSS v18.0, Wilcoxon signed ranks test, Pearson correlation and Receiver Operating Characteristic (ROC) curve analysis were used for statistical analysis. A p<0.05 was considered statistically significant.ResultsIn the sample group, 34.7% had anterior Bolton index (ABI) and 20.7% had total Bolton index (TBI) greater than 2 Standard Deviations (2SDs) of Bolton’s means, and about half of them required correction of the ABI considering the actual size of discrepancies (mm). The sensitivity of estimating clinically significant tooth size discrepancy more than 2SDs of Bolton’s ABI and the visual judgment was 96.0% and a cut-off point of −0.12mm was obtained.ConclusionBolton’s analysis should be routinely performed in all orthodontic patients, and visual estimation of TSD would be suggested as a screening method in the first visit prior to measurements and set-ups.

show abstract

Bolton s intermaxillary tooth size ratios among Iranian schoolchildren

Cited by 13 publications

References 20 publications

Evaluating the Symmetry of Permanent Teeth Dimensions on Two Sides of Dental Arches with Different Occlusions and Related Factors

Evaluating the Symmetry of Permanent Teeth Dimensions on Two Sides of Dental Arches with Different Occlusions and Related Factors

A systematic review and meta-analysis on Bolton’s ratios: Normal occlusion and malocclusion

Bolton discrepancy in an Iranian population and its relation with maxillary lateral incisors’ size

Contact Info

Product

Resources

About