Effect of Ti:sapphire laser on shear bond strength of orthodontic brackets to ceramic surfaces

Abstract

Within the limitations of this in vitro study, Ti:sapphire laser- treated surfaces had the highest SBS values. Therefore, this technique may be useful for the pretreatment of ceramic surfaces as an alternative to 'conventional' techniques.

Evaluation of Different Types of Lasers in Surface Conditioning of Porcelains: A Review Article

“…Kara et al 35 and Dilber et al 38 demonstrated the efficacy of this laser at 10 W power and 20 Hz frequency for surface etching; the results showed the same level of surface modification as HF. Erdur et al 23 used Er:YAG with an output power of 1-6 W and frequency of 20 Hz and reported non-acceptable SBS; the surface roughness evaluated by electronic microscope was not acceptable as well. While in this study Er:YAG was not beneficial, titanium sapphire laser could deliver efficient changes at 0.45 W power.…”

Effects of femtosecond laser and other surface treatments on the bond strength of metallic and ceramic orthodontic brackets to zirconia

“…Zirconia flat plates were used so the shape and dimensions of the adherent surfaces could be standardized through the experiment, being reproducible, and so the results could be compared to similar researches [ 12 , 13 , 15 ]. Square shape was chosen rather than round since it was found to be more stable in the acrylic resin bases during testing.…”

“…SBS tests were conducted according to the standards used in the last published studies on bracket-to-ceramic adhesion [ 12 , 13 , 17 , 18 ]. All bonded specimens were mounted perpendicularly on acrylic resin bases and underwent shear loading using a knife edge system at a crosshead speed of 0.5 mm / min until they fractured, using a universal testing machine (AGS-X Autograph, Shimadzu Corporation, Kyoto, Japan).…”

“…Femtosecond lasers have been proposed as an alternative for treating zirconia surfaces in an attempt to improve the adhesion of dental cements and orthodontic brackets [ 12 – 15 ]. These lasers, consisting of a Titanium-Sapphire oscillator, provide ultrashort pulses in the femtosecond range, and cause no thermal damage to the irradiated surfaces [ 16 ].…”

“…Only two studies have analyzed the shear bond strength of brackets bonded to ceramic surfaces treated with femtosecond laser [ 12 , 13 ]. In both investigations, the authors used metallic brackets; no study has ever assayed the performance of ceramic brackets bonded to femtosecond laser-treated porcelain surfaces.…”