Abstract
Background
The aim of this study was to evaluate the extent of root resorption, the prevalence
of infraocclusion, and the correlation between these variables in orthodontic patients
with mandibular deciduous second molars without succedaneous permanent teeth from
childhood to 30 years of age.
Methods
One hundred fifty-eight patients were stratified into four groups, by age: group 1,
patients ranging from 5 to <10 years of age; group 2, from 10 to <15; group 3, from
15 to <20; and group 4, from 20 to 30 years. Panoramic radiographs and dental casts
were examined to verify the presence of infraocclusion and to classify the extent
of root resorption using scores from 1 (no resorption) to 5 (absent tooth).
Results
Group 1 (age 5–<10 years) had a significantly lesser extent of root resorption than
did the other groups, but the intergroup difference in the prevalence of infraocclusion
was not significant. In the overall cohort, 25% of the teeth had infraocclusion, with
a positive significant correlation between root resorption and infraocclusion.
Conclusions
The results of this study suggest that root resorption tends to increase from the
first to the second decade of life and to remain stable until the third decade. Furthermore,
one-fourth of these patients with second premolar agenesis showed infraocclusion of
deciduous molars, and the amount of root resorption was positively correlated with
infraocclusion.
Keywords
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Article info
Publication history
Published online: August 30, 2014
Accepted:
June 27,
2014
Received in revised form:
June 13,
2014
Received:
February 26,
2014
Identification
Copyright
© 2014 World Federation of Orthodontists. Published by Elsevier Inc. All rights reserved.
