Bond Strength of Metallic or Ceramic Orthodontic Brackets to Enamel, Acrylic, or Porcelain Surfaces

Materials

Filipe Silva¹  Bruno Henriques¹  JúlioC. M. Souza¹  Óscar Carvalho¹  Mónica Pinho²  MariaC. Manso²  RicardoFaria Almeida³  Afonso Pinhão Ferreira³  Conchita Martin⁴ 

[1] Center for MicroElectromechanical Systems (CMEMS-UMINHO), University of Minho, 4800-058 Guimarães, Portugal;Faculty of Health Sciences (FCS), Universidade Fernando Pessoa (UFP), 4249-004 Porto, Portugal;School of Dentistry (FMDUP), University of Porto (UP), 4200-135 Porto, Portugal;School of Dentistry, University Complutense of Madrid (UCM), 28040 Madrid, Spain;

关键词: shear bond strength;    tensile bond strength;    orthodontic brackets;    adhesion;   

DOI  :  10.3390/ma13225197

来源: DOAJ

【 摘 要 】

Bonding strategies within different brackets and dental materials are still a challenge concerning adhesion and dental surface damage. This study compared the shear and tensile bond strength of orthodontic ceramic and metallic brackets to enamel, acrylic, and ceramic surfaces after thermal cycling. Dental surfaces were divided into three groups: enamel, ceramic, and acrylic. Each group received stainless-steel and ceramic brackets. After thermal cycling, specimens were randomly divided into two subgroups considering tensile (TBS) or shear bond strength (SBS) test. After the mechanical testing, scanning electron and optical microscopy were performed, and the adhesive remnant index (ARI) was determined. The two-way ANOVA full factorial design was used to compare TBS, SBS, and ARI on the surface and bracket type (α = 0.05). There were significant differences in TBS, SBS, and ARI values per surface (p < 0.001 and p = 0.009) and type of bracket (p = 0.025 and p = 0.001). The highest mean SBS values were recorded for a ceramic bracket bonded to an acrylic surface (8.4 ± 2.3 MPa). For TBS, a ceramic bracket bonded to acrylic showed the worst performance (5.2 ± 1.8 MPa) and the highest values were found on a metallic bracket bonded to enamel. The adhesion of metallic or ceramic brackets is enough for clinical practice although the damage of the enamel surface after debonding is irreversible and harmful for the aesthetic outcome of the teeth.

【 授权许可】

Unknown