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18 November 2018 : Animal Research

[Retracted] Dynamic Evaluation of Orthodontically-Induced Tooth Movement, Root Resorption, and Alveolar Bone Remodeling in Rats by in Vivo Micro-Computed Tomography

Jianping Zhou123ABCDEF, Fengxue Yang123BC, Xiaolin Xu123BC, Gang Feng123A, Jun Chen123B, Jinglin Song143A, Hongwei Dai123ADG*

DOI: 10.12659/MSM.912470

Med Sci Monit 2018; 24: ANS8306-8314

This publication has been retracted by the Editor due to the identification of non-original figure images and manuscript content that raise concerns regarding the credibility and originality of the study and the manuscript. Reference: Jianping Zhou, Fengxue Yang, Xiaolin Xu, Gang Feng, Jun Chen, Jinglin Song, Hongwei Dai. Dynamic Evaluation of Orthodontically-Induced Tooth Movement, Root Resorption, and Alveolar Bone Remodeling in Rats by in Vivo Micro-Computed Tomography. Med Sci Monit, 2018; 24: 8306-8314. DOI: 10.12659/MSM.912470

Abstract

BACKGROUND: The aim of this study was to dynamically evaluate tooth movement, root resorption, and remodeling of alveolar bone using different forces to cause tooth movement in rats.

MATERIAL AND METHODS: 12-week-old male Sprague-Dawley rats were selected. Nickel-titanium (Ni-Ti) coil springs (20 g, 50 g, and 100 g forces) were placed for mesial movement of the left first maxillary molar teeth. Tooth movement, root resorption, and microarchitectural parameters of the trabecular bone were evaluated by in vivo micro-CT. Histological examination was used to observe the root resorption, alveolar bone remodeling, and changes in osteoclasts from day 0 to day 14.

RESULTS: The tooth movement distance increased significantly over the initial 3 days in the 3 groups. The 20 g force group showed more tooth movement than in the 50 and 100 g force groups after 14 days (P<0.05). From days 7 to 10, root resorption lacunae appeared in the 3 groups and then stabilized, and the 100 g force group produced more lacunar resorption than in the anther 2 groups (P<0.05). Compared to day 0, the trabecular thickness and bone volume fraction on the pressure side gradually decreased from day 7 to day 14. The structure model index increased significantly from day 3 to day 14. Histological examination showed remarkable root resorption craters and osteoclasts positive for tartrate-resistant acid phosphatase in the root resorption lacunae in the 50 g and 100 g groups from day 7 to day 14.

CONCLUSIONS: A 100 g heavy force can be used to establish a root resorption model in rats.

Keywords: Retracted Publication

Retraction note

Med Sci Monit 2021; 27:e935851     https://medscimonit.com/abstract/index/idArt/935851
 
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