Effects of different primers on indirect orthodontic bonding: Shear bond strength, color change, and enamel roughness.
10.4041/kjod.2018.48.4.245
- Author:
Mirella Lemos QUEIRÓZ TAVARES
1
;
Carlos Nelson ELIAS
;
Lincoln Issamu NOJIMA
Author Information
1. Department of Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. linojima@gmail.com
- Publication Type:Original Article
- Keywords:
Bonding;
Shear strength;
Enamel roughness;
Color change
- MeSH:
Adhesives;
Aluminum Oxide;
Coffee;
Dental Enamel*;
Incisor;
Shear Strength;
Tooth;
Tungsten
- From:The Korean Journal of Orthodontics
2018;48(4):245-252
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: We aimed to perform in-vitro evaluation to compare 1) shear bond strength (SBS), adhesive remnant index (ARI), and color change between self-etched and acid-etched primers; 2) the SBS, ARI and color change between direct and indirect bonding; and 3) the enamel roughness (ER) between 12-blade bur and aluminum oxide polisher debonding methods. METHODS: Seventy bovine incisors were distributed in seven groups: control (no bonding), direct (DTBX), and 5 indirect bonding (ITBX, IZ350, ISONDHI, ISEP, and ITBXp). Transbond XT Primer was used in the DTBX, ITBX, and ITBXp groups, flow resin Z350 in the IZ350 group, Sondhi in the ISONDHI group, and SEP primer in the ISEP group. SBS, ARI, and ER were evaluated. The adhesive remnant was removed using a low-speed tungsten bur in all groups except the ITBXp, in which an aluminum oxide polisher was used. After coffee staining, color evaluations were performed using a spectrophotometer immediately after staining and prior to bonding. RESULTS: ISONDHI and ISEP showed significantly lower SBS (p < 0.01). DTBX had a greater number of teeth with all the adhesive on the enamel (70%), compared with the indirect bonding groups (0–30%). The ER in the ITBX and ITBXp groups was found to be greater because of both clean-up techniques used. CONCLUSIONS: Direct and indirect bonding have similar results and all the primers used show satisfactory adhesion strength. Use of burs and polishers increases the ER, but polishers ensure greater integrity of the initial roughness. Resin tags do not change the color of the teeth.
