The effect of intrusive orthodontic force on dental pulp of adults versus adolescents

Abtahi, M. and Eslami, N. and Abadi, R. Z. M. and Rezaei, S. P. (2016) The effect of intrusive orthodontic force on dental pulp of adults versus adolescents. Dental Research Journal, 13 (4). pp. 367-372.

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Background: There is no conclusive evidence on the effect of orthodontic force application on dental pulp tissue. The aim of this study was to compare early and delayed histological effects of intrusive forces on dental pulp of adolescents and adults. Materials and Methods: Patients referred to the Department of Orthodontics of Mashhad University of Medical Sciences participated in this study. They were assigned to adult (25-32-year-old) and adolescent (13-18-year-old) Groups. A cantilever spring made of 16 × 22 steel wire was used to apply intrusive force to upper first premolars (11 teeth in adolescents and 11 teeth in adults) and the opposing teeth were considered as control group. In each group, 6 pairs of teeth were extracted after one week, and the remaining 5 pairs were extracted after one month of intrusion. Histologic changes were compared between the control and intrusive groups and also between the adults and adolescents after 7 days and 1 month. Statistical analysis was performed using Statistical Package for the Social Sciences and Wilcoxon and Mann-Whitney U-tests. P ≤ 0.05 was set as statistically significant. Results: Significant difference was not found in any histological parameters between intrusive and control groups 1 week and 1 month after intrusion in adolescents and adults (P > 0.05). One month after intrusion, inflammatory cell response intensity (P = 0.032) and frequency of chronic inflammation (P = 0.032) were significantly higher in adults compared to adolescents. Conclusion: Mild intrusive force in closed apex teeth causes no significant histologic changes in adolescents and adults. However, it seems that inflammatory-related histologic pulpal changes are more severe in adults after one month of intrusion. © 2016 Dental Research Journal | Published by Wolters Kluwer - Medknow.

Item Type: Article
Additional Information: Cited By :4 Export Date: 16 February 2020 Correspondence Address: Eslami, N.; Department of Orthodontics, Dental Research Center, Faculty of Dentistry, Mashhad University of Medical SciencesIran; email:
Uncontrolled Keywords: Dental pulp histology intrusion
Subjects: WU Dentistry. Oral surgery
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib4 lib4
Date Deposited: 03 Mar 2020 10:14
Last Modified: 03 Mar 2020 10:14

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