Effect of low-level laser therapy on orthodontic tooth movement into bone-grafted alveolar defects.

Abstract

INTRODUCTION:

The objective of this study was to investigate the effect of low-level laser therapy (LLLT) on the rate of orthodontic tooth movement (OTM) into bone-grafted alveolar defects based on different healing states.

METHODS:

Ten male beagles were randomly allocated to 3 groups: group C, OTM alone as a control; group G, OTM into the grafted defects; group GL, OTM into the grafted defects with LLLT. The maxillary second premolars were protracted into the defects for 6 weeks, immediately (G-0 and GL-0) and at 2 weeks (G-2 and GL-2) after surgery. The defects were irradiated with a diode laser (dose, 4.5 J/cm(2)) every other day for 2 weeks. The rates of OTM and alveolar bone apposition, and maturational states of the defects were analyzed by histomorphometry, microcomputed tomography, and histology.

RESULTS:

The total amounts of OTM and new bone apposition rates were decreased by LLLT, with increased bone mineral density and trabecular maturation in the defects. Group GL-2 had the slowest movement with root resorption in relation to less woven bone in the hypermatured defect.

CONCLUSIONS:

LLLT significantly decreased the rate of OTM into the bone-grafted surgical defects by accelerating defect healing and maturation, particularly when the start of postoperative OTM was delayed.

• Authors: Kyung-A Kim, Eun-Kyung Choi, Joo-Young Ohe, Hyo-Won Ahn, Su-Jung Kim
• Journal: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics (Am J Orthod Dentofacial Orthop) Vol. 148 Issue 4 Pg. 608-17 (Oct 2015) ISSN: 1097-6752 [Electronic] United States
• PMID: 26432316 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2015 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.

Chemical References

• Bone Substitutes
• Fluorescent Dyes

Topics

• Alveolar Process (radiation effects, surgery)
• Animals
• Bone Density (radiation effects)
• Bone Matrix (transplantation)
• Bone Regeneration (radiation effects)
• Bone Remodeling (radiation effects)
• Bone Substitutes (therapeutic use)
• Bone Transplantation (methods)
• Dogs
• Fluorescent Dyes
• Lasers, Semiconductor (therapeutic use)
• Low-Level Light Therapy (methods)
• Male
• Maxillary Diseases (radiotherapy, surgery)
• Osteogenesis (radiation effects)
• Random Allocation
• Tooth Movement Techniques (methods)
• Tooth Socket (radiation effects, surgery)
• X-Ray Microtomography (methods)