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BioMed Research International
Volume 2017 (2017), Article ID 8390575, 7 pages
Research Article

Enamel Thickness before and after Orthodontic Treatment Analysed in Optical Coherence Tomography

1Division of Orthodontics, Technical University Dresden, Dresden, Germany
2Division of Orthodontics, Pomeranian Medical University, Szczecin, Poland
3Department of Biomedical Computer Systems, University of Silesia, Faculty of Computer Science and Materials Science, Institute of Computer Science, Katowice, Poland
4Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Szczecin, Poland

Correspondence should be addressed to Monika Machoy

Received 12 October 2016; Accepted 15 December 2016; Published 24 January 2017

Academic Editor: Satoshi Imazato

Copyright © 2017 Julia Seeliger et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Despite the continuous development of materials and techniques of adhesive bonding, the basic procedure remains relatively constant. The technique is based on three components: etching substance, adhesive system, and composite material. The use of etchants during bonding orthodontic brackets carries the risk of damage to the enamel. Therefore, the article examines the effect of the manner of enamel etching on its thickness before and after orthodontic treatment. The study was carried out in vitro on a group of 80 teeth. It was divided into two subgroups of 40 teeth each. The procedure of enamel etching was performed under laboratory conditions. In the first subgroup, the classic method of enamel etching and the fifth-generation bonding system were used. In the second subgroup, the seventh-generation (self-etching) bonding system was used. In both groups, metal orthodontic brackets were fixed and the enamel was cleaned with a cutter fixed on the micromotor after their removal. Before and after the treatment, two-dimensional optical coherence tomography scans were performed. The enamel thickness was assessed on the two-dimensional scans. The average enamel thickness in both subgroups was not statistically significant.