Bolton ratio in subjects with normal occlusion and malocclusion
Braz. j. oral sci
;
12(4): 357-361, Oct.-Dec. 2013. tab
Article
in English
| LILACS
| ID: lil-701327
ABSTRACT
AIM:
To verify the presence of Bolton anterior and total discrepancy in Brazilian individuals with natural normal occlusion and Angle's Class I and Class II, division 1 malocclusions.METHODS:
The sample was divided in three groups (n=35 each) natural normal occlusion; Class I malocclusion; Class II, division 1 malocclusion. Of the 105 Caucasian Brazilian individuals, 24 were boys and 81 were girls aged from 13 to 17 years and 4 months. The mesiodistal width of the maxillary and mandibular teeth, from the left first molar to the right first molar, was measured on each pre-treatment dental plaster cast using a digital caliper accurate to 0.01 mm resolution. Values were tabulated and the Bolton ratio was applied. The Kolmogorov-Smirnov test was used to verify if data were normally distributed (p>0.2). For comparison between the values obtained and those from the Bolton standard, Student's t test was used and one-way ANOVA was used for comparisons among the 3 groups, with a significance level of 5% (p<0.05).RESULTS:
For groups 1, 2 and 3, respectively, the total ratio found was 90.36% (SD 1.70), 91.17% (SD±2.58) and 90.76% (SD±2.45); and the anterior ratio was 77.73% (SD 2.39), 78.01% (SD 2.66) and 77.30% (SD 2.65).CONCLUSIONS:
There was no significant difference among the groups regarding the values indicated in the Bolton ratio.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Tooth Abnormalities
/
Malocclusion, Angle Class I
/
Malocclusion, Angle Class II
Limits:
Adolescent
/
Female
/
Humans
/
Male
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2013
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Federal University of Sergipe/BR
/
Methodist University of São Paulo/BR
/
Sacred Heart University/BR
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