NDLI: Extracorporeal shockwave treatment impedes tooth movement in rats

Content Provider	Springer Nature : BioMed Central
Author	Atsawasuwan, Phimon Chen, Yinghua Ganjawalla, Karan Kelling, Albert L. Evans, Carla A.
Abstract	Background Accelerated tooth movement has been a topic of interest for orthodontic research recently. Surgically facilitated orthodontic treatment has been shown to be an effective approach to accelerate tooth movement; however, it remains invasive, requires additional surgery, and may increase post-operative complications. In this study, we evaluate the effects of extracorporeal shockwave treatment (ESWT), a non-invasive approach to regenerate alveolar bone, on orthodontic tooth movement in rats. Materials and methods Seventy-two male rats, aged 10 weeks old, were subjected to 10-cN closed-coil nickel-titanium springs for unilateral maxillary first molar tooth movement. One group of rats received a single treatment of extracorporeal shockwave treatment at 500 impulses at energy flux density 0.1 mJ/mm2, with a pulse rate of 5 pulses per second immediately after spring installation while the non-ESWT-treated group served as a control group. The rats were sacrificed at day 3, 7, 14, 21 and 28 for tooth movement evaluation and sample analyses. Faxitron radiography, histological, double bone labeling and gene expression analyses were performed. Serum biochemistry was evaluated at day 3, 7 and 28 of the study. Kruskal-Wallis analysis of variance was used to determine the mean difference among groups, and multiple comparisons were analyzed by Mann-Whitney-U tests with a significance level = 0.05. Results The results demonstrated that tooth movement in the ESWT-treated rats (0.11 ± 0.07 mm) was impeded compared to the tooth movement in the non-ESWT-treated rats (0.44 ± 0.09 mm). ESWT up-regulated several osteoblastic and osteoclastic gene markers and cytokines; however, the effects on osteoclasts were only transient. Double-fluorescence bone labeling demonstrated that osteoblastic activity increased after ESWT treatment. There was no difference in systemic RANKL/OPG ratio between groups. Conclusions ESWT at 500 impulse at energy flux density 0.1 mJ/mm2 increased osteoblast and osteoclast activities and imbalanced bone remodeling resulting in impeded tooth movement in rats.
Related Links	https://head-face-med.biomedcentral.com/counter/pdf/10.1186/s13005-018-0181-5.pdf
Ending Page	8
Page Count	8
Starting Page	1
File Format	HTM / HTML
DOI	10.1186/s13005-018-0181-5
Journal	Head & Face Medicine
Issue Number	1
Volume Number	14
Language	English
Publisher	BioMed Central
Publisher Date	2018-11-12
Access Restriction	Open
Subject Keyword	Otorhinolaryngology Oral and Maxillofacial Surgery Dentistry Head and Neck Surgery Tooth movement ESWT Shockwave Orthodontic Rat
Content Type	Text
Resource Type	Article
Subject	Otorhinolaryngology Neurology (clinical) Dentistry
Journal Impact Factor	2.4/2023
5-Year Journal Impact Factor	2.9/2023

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