title: Enamel Quality after Debonding: Evaluation by Optical Coherence Tomography.
abstract: The aims of this study were to evaluate quantitatively the enamel fractures, adhesive remnants and bracket fragments on enamel after debonding of metal and ceramic brackets, and to quantify the layer of adhesive remnants in depth after two different cleanup procedures. Metal and ceramic brackets were bonded on 120 human incisors and then debonded using two different techniques with Side Cutter (SC) and Anterior Bracket Removal plier (ABR). After this, a high-speed tungsten carbide finishing bur or a low-speed tungsten carbide finishing bur was used. The debonded samples were submitted to enamel assessment with optical coherence tomography (OCT). In sequence, two different methods of removing the remaining adhesive (tungsten carbide burs at high and low speed) were performed and at the end of these procedures, the remaining adhesive layer was measured with OCT. The results demonstrated that enamel fractures were observed only in the samples bonded with ceramic brackets, and the type of pliers did not influence the incidence and extent of enamel damage. Moreover, the type of debonding technique (with side-cutting pliers or anterior bracket removal pliers) and the type of bracket did not influence the amount of adhesive remaining after debonding. The burs at low speed removed the remaining adhesive more effectively during cleanup procedures.
authors: Dentistry Post-graduation Program in Orthodontics, School of Health and Biosciences, Pontifícia Universidade Católica do Paraná, Curitiba, PR, BR.
authors: Jorge César Borges
authors: JC
authors: Leão Filho
authors: Biomedical Engineering Post-graduation Program, Universidade Federal de Pernambuco, Recife, PE, BR.
authors: Ana Karla Souza
authors: AK
authors: Braz
authors: Dentistry Post-graduation Program in Orthodontics, School of Health and Biosciences, Pontifícia Universidade Católica do Paraná, Curitiba, PR, BR.
authors: Renato Evangelista
authors: RE
authors: de Araujo
authors: Dentistry Post-graduation Program in Orthodontics, School of Health and Biosciences, Pontifícia Universidade Católica do Paraná, Curitiba, PR, BR.
authors: Orlando Motohiro
authors: OM
authors: Tanaka
authors: Department of Health, Universidade Estadual do Sudoeste da Bahia, Jequié, BA, BR.
authors: Matheus Melo
authors: MM
authors: Pithon
mesh_terms: D017005:Dental Debonding; D003743:Dental Enamel; D006801:Humans; D041623:Tomography, Optical Coherence