Effects of Low-Intensity Pulsed Ultrasound on Orthodontic Tooth Movement and Orthodontically Induced Inflammatory Root Resorption in Ovariectomized Osteoporotic Rats.

Autor:	Dahhas FY; Department of Orthodontics, School of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia., El-Bialy T; Department of Orthodontics and Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada., Afify AR; Department of Orthodontics, School of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia., Hassan AH; Department of Orthodontics, School of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia. Electronic address: aakbr@kau.edu.sa.
Jazyk:	angličtina
Zdroj:	Ultrasound in medicine & biology [Ultrasound Med Biol] 2016 Mar; Vol. 42 (3), pp. 808-14. Date of Electronic Publication: 2015 Dec 29.
DOI:	10.1016/j.ultrasmedbio.2015.11.018
Abstrakt:	This study investigated the effects of low-intensity pulsed ultrasound (LIPUS) on orthodontic tooth movement (OTM) and orthodontically induced inflammatory root resorption (OIRR) in ovariectomized osteoporotic rats. Forty-eight 28-d-old female Wistar rats were divided into ovariectomized and intact groups. In both groups, animals were left untreated; treated with 50 g mesially directed orthodontic force on the maxillary first molars using nickel-titanium closed-coil springs for 28 d; or treated with the same orthodontic protocol along with a 20-min LIPUS application on alternate days for 28 d. Extent of OTM and amount of OIRR of mesial roots were measured on three-dimensionally reconstructed micro-computed tomography images. Ovariectomy increased OIRR (p < 0.05). LIPUS reduced root volumetric loss regardless of ovariectomy status (p < 0.05); only ovariectomized animals had decreased OTM (p < 0.05). LIPUS normalizes OTM and attenuates OIRR in ovariectomized osteoporotic rats. It may therefore be beneficial in women with postmenopausal osteoporosis. (Copyright © 2016 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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