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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

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02.02.2018 | Original Article

Effect of EMD on the orthodontically induced root resorption repair process in rats

verfasst von: Qin Hu, Jianping Zhou, Xiaolin Xu, Hongwei Dai

Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie | Ausgabe 2/2018

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Abstract

Background

While different levels of root resorption may occur in orthodontic treatment, several preventive approaches have been reported. Nevertheless, little is known about the effect of enamel matrix derivative (EMD) on root repair during orthodontic tooth movement.

Objective

To evaluate the effect of EMD on root resorption repair following the application of orthodontic force.

Materials and methods

A force of 100 g was exerted for 14 days on the left maxillary first molars of twenty 10-week-old Sprague-Dawley rats divided into the EMD and control groups (n = 10 per group). In the EMD group, repeatedly injection of Emdogain® was administered after the appliance was removed, while phosphate-buffered saline was administered in the control group. In vivo microcomputed tomography (CT), haematoxylin and eosin (H&E) staining, and immunohistochemistry were then used to evaluate the effect of EMD on the process of root repair.

Results

In the EMD group, the observed decrease in root resorption crater volume and increase in both the bone volume fraction and trabecular thickness were significantly greater than those in the control group. H&E staining showed that the periodontal fibres were relatively regular in arrangement and that the surface of the cementum was smooth in the EMD group. Immunohistochemical analysis showed higher bone morphogenetic protein 2 (BMP-2) and bone sialoprotein (BSP) expression levels in the EMD group than in the control group. In addition, the osteoprotegerin (OPG) and receptor activator of NF-κB ligand (RANKL) expression levels were similar in both groups.

Conclusion

EMD enhanced the repair process following orthodontically induced root resorption in rats.

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Titel: Effect of EMD on the orthodontically induced root resorption repair process in rats
verfasst von: Qin Hu
Jianping Zhou
Xiaolin Xu
Hongwei Dai
Publikationsdatum: 02.02.2018
Verlag: Springer Medizin
Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie / Ausgabe 2/2018
Print ISSN: 1434-5293
Elektronische ISSN: 1615-6714
DOI: https://doi.org/10.1007/s00056-017-0119-8

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Effect of EMD on the orthodontically induced root resorption repair process in rats

Abstract

Background

Objective

Materials and methods

Results

Conclusion

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Abstract

Background

Objective

Materials and methods

Results

Conclusion

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