The Journal
Table 3 : Comparing anterior ratio of Punjabi and Caucasian subjects
The mean Punjabi OR is 92.5% as compared to
the Caucasian OR which is 91.3% while the
mean AR for Punjabi was 79.84% and 77.2% for
Caucasian.
Discussion
To attain an optimum inter arch dental
relationship, the maxillary tooth material should
be in approximate desirable ratios to the
mandibular tooth material. The importance of
tooth size discrepancies in orthodontic
diagnosis has been widely reported in the
literature and accepted by the orthodontic
community because the relationship between
the upper and lower anterior dentitions is
related to orthodontic finishing excellence.
In the present study, the mean tooth size ratios
using Punjabi subject was different from
Bolton’s measurements using Caucasian
subject. This study contained a large dispersion
of the OR and AR for Punjabi subjects. The
difference in these studies could be accounted
to the samples involved as Bolton study used a
sample of 55 subjects and this present study
had a sample size of 100 subjects, or this could
imply small degree of variation among
Caucasian tooth sizes.
The overall ratio and anterior ratio using Punjabi
subjects was different from Bolton’s
measurements. This can be possibly explained
by variations in mesiodistal dimensions of
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specific teeth, the maxillary teeth showing
greater variability than the mandibular
teeth.The mesiodistal dimension of maxillary
lateral incisor, second premolar, first molar was
less and that of mandibular second premolar
was more in Punjabi subjects as compared to
Caucasian subjects of a study by Judica
Balders- Dizon13 on Bolton tooth size analysis
of Filipinos. The clinical importance of this
finding is the non applicability of Bolton’s values
for Punjabi population. Similar results were
seen in a study done by Singh and Goyal 14 on
North Indian population who showed AR - 78%
and OR - 96.53% which are more than Bolton’s
values. In another study done by Uysal and
Sari 12 on Turkish population the OR - 89.88%
and AR - 78.26% which were significantly
different form that of Bolton’s population. In a
study done on Nepalese population, Qu Hong
et al15 found out that the AR - 78.04% is
different and OR - 91.22% is similar to that of
Bolton’s values.
Smith et al 5 compared 3 populations of
Whites, Blacks and Hispanics which showed
that OR and AR the three populations (except
AR of White females) differed significantly from
Bolton’s values. On the basis of the foregoing, it
is clear that the Bolton’s ratios are not
applicable across all populations. Separate
standards for different populations are needed.
Vol. 13
12 No. 1
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May-August
Sept-Dec 2017
Jan-April
2016
2016