Mixed Dentition Space Analysis in Kodava Population: A Comparison of Two Methods
Aims: To evaluate the reliability of Tanaka and Johnston and Moyer’s (75th percentile) mixed dentition prediction methods in Kodava population sample, to formulate regression equations for predicting the mesiodistal widths of unerupted canines and premolars and to construct probability tables fo...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
JCDR Research and Publications Private Limited
2014-09-01
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| Series: | Journal of Clinical and Diagnostic Research |
| Subjects: | |
| Online Access: | https://jcdr.net/articles/PDF/4777/10001_CE(Ra)_F(Sh)_PF1(PAK)_PFA(AK)_PF2(AGAK).pdf |
| Summary: | Aims: To evaluate the reliability of Tanaka and Johnston and
Moyer’s (75th percentile) mixed dentition prediction methods in
Kodava population sample, to formulate regression equations
for predicting the mesiodistal widths of unerupted canines and
premolars and to construct probability tables for the Kodava
population.
Settings and Design: Data was obtained from Kodava subjects
visiting the clinics for routine dental check up.
Materials and Methods: Dental models of 30 male and 30
female Kodava subjects (age range is 16 - 23 yr) were used.
Teeth measured included mandibular permanent incisors,
maxillary and mandibular permanent canines, first and second
premolars. Digital caliper calibrated to 0.01mm was used to
record mesiodistal dimensions. The actual teeth measurements
were then statistically compared with the predicted values
derived from the Tanaka and Johnston’s equations and Moyers
probability tables at the 75th percentile.
Statistical Analysis Used: Descriptive statistics including
means, standard deviations were calculated for the actual
and predicted tooth sizes. Student’s t-tests were performed
to compare the differences between the measured mesiodistal
widths of canine, first and second premolars and the predicted
values derived from Moyers. Correlation and regression analysis
were performed to formulate standard regression equations.
Results: Tanaka and Johnston prediction equations
overestimated the mesiodistal widths of permanent canines
and premolars in both the arches. Moyers 75th percentile also
overestimated the actual measurements except for the maxillary
arch in female subjects. The percentage of overestimation was
more for Tanaka – Johnston prediction method than that of
Moyers (75th percentile). Correlation and regression analysis
were performed between the predicted and actual tooth size
and standard regression equations were developed for the
Kodava population. Probability tables were also constructed
from the data obtained.
Conclusion: The data from present study illustrates the limitation
of Tanaka and Johnston regression equations and Moyer’s (75th
percentile) chart when applied to Kodava population. From this
data, regression equations and probability tables were derived
for tooth size prediction for Kodava population. This would
be more accurate when applied to local children of Kodava
community. |
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| ISSN: | 2249-782X 0973-709X |