Bond Strength of Orthodontic Brackets to Temporary Crowns: In Vitro Effects of Surface Treatment
Table 1
Specimens grouping according surface treatment and treatment procedures.
Group (n)
Surface treatment
Control (15)
No treatment
G1 (15)
Blue, medium grit grinding
Each specimen was subjected to 5 strokes in the same direction at the center of the surface by one well-trained investigator using diamond burs (Jota diamond bur, Switzerland) with three different grit sizes: medium, coarse, and supercoarse.
G2 (15)
Green, coarse grit grinding
G3 (15)
Black, supercoarse grinding
G4 (15)
Sandblasting
Specimens were sandblasted (50 mg alumina particles) for 10 seconds from a distance of 10 mm by the application of 0.55 MPa of propulsion pressure using Wassermann Dental-Machine, CEMAT-NT3, GMBH, Hamburg, Germany. Specimens were rinsed with a steady stream of water for 30 seconds and then dried with compressed air.
