AI Article Synopsis
- The study investigated the effects of orthodontic intrusion on human pulpal tissue over a 21-day period through histological examination.
- A sample of 17 young individuals had 34 premolars evaluated, with subjected teeth experiencing a force of 60 g while the control group received no force.
- Results showed significant increases in fibrous tissue and pulpal nodules in the teeth that underwent intrusion, along with observed vascular changes, but no difference in the number of blood vessels was noted between the experimental and control groups.
Article Abstract
Introduction: The forces applied during orthodontic treatment bring about effects on the teeth and surrounding tissues. The aim of this study was to evaluate the possible changes in the human pulpal tissue resulting from orthodontic intrusion in a 21-day period using histologic examination.
Methods: The sample consisted of 17 young individuals of both sexes between the ages of 12 and 19 years. A total of 34 premolars were evaluated with orthodontic indication of extraction. Because it is a split-mouth study, in each patient, intrusion force of 60 g was applied randomly on 1 of the dental elements experimental group for 21 days. The counterpart control group received no force. After extractions, these dental elements were fixed in 10% formaldehyde, processed automatically, submitted to histotechnical preparation, and stained with hematoxylin-eosin for analysis under optical microscope.
Results: The paired Fisher exact test (P ≤ .05) showed a significant increase of fibrous tissue in the experimental group. The nonparametric paired Wilcoxon test (P ≤ .05) showed a significant increase in the number of pulpal nodules in the elements of the experimental group and showed no difference in the number of blood vessels between the groups. Large-caliber vessels and congested elements were observed in 8 of the experimental group elements.
Conclusions: The orthodontic intrusion force, in these conditions, caused vascular changes in the pulpal tissue and also increased the presence of fibrosis and the number of pulp calcifications in the experimental elements.
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| http://dx.doi.org/10.1016/j.joen.2013.10.039 | DOI Listing |
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