Effect of Rebonding on the Bond Strength of Orthodontic Tubes: A Comparison of Light Cure Adhesive and Resin-Modified Glass Ionomer Cement In Vitro

Abstract

The purpose of this study was to determine the impact of different enamel preparation procedures and compare light cure composite (LCC) and resin-modified glass ionomer (RMGI) on the bond strength of orthodontic metal tubes rebonded to the enamel. Twenty human molars were divided into two groups (n = 10). Tubes were bonded using LCC (Transbond XT) in group 1 and RMGI (Fuji Ortho LC) in group 2. The tubes in each group were bonded following manufacturers' instructions (experiment I) and then debonded using testing machine. Then, the same brackets were sandblasted and rebonded twice. Before the first rebonding, the enamel was cleaned using carbide bur (experiment II) and before second rebonding, it was cleaned using carbide bur and soda blasted (experiment III). Mann–Whitney and Wilcoxon signed-rank tests showed no significant difference between RMGI and LCC bond strengths in case of normal bonding and rebonding, when enamel was cleaned using carbide bur before rebonding. Enamel soda blasting before rebonding significantly increased RMGI tensile bond strength value compared to LLC (p < 0.05). LCC and RMGI (especially RMGI) provide sufficient bond strengths for rebonding of molar tubes, when residual adhesive from previous bonding is removed and enamel soda blasted.

The Effect of Peri-Bracket Excess Adhesive on Shear Bond Strength and Enamel–Adhesive Interface Morphology With Confocal Laser Scanning Microscopy: An In Vitro Comparative Study

“…This finding was not statistically significant and these teeth were not amongst the highest-scored SBS value nor did they score a value exceeding 20 to 25 MPa, the force at which enamel fracture may occur during debonding. 27 Also, although all the samples were inspected for any cracks or deficiency before testing, these samples may have failed in this manner because of preexisting deficiencies or because the sample became desiccated during testing.…”

Comparison of shear bond strength of rebonded stainless steel brackets with three different enamel surface conditioning methods

“…[ 7 ] It can be attributed to the remaining adhesives on the enamel and thereby reducing the bond strength during rebond. [ 8 9 ] However, some studies reported similar rates of SBS for bond and rebond;[ 10 ] even some reported higher rates for rebond. [ 11 12 ] Hence, rebonding requires appropriate surface conditioning to remove remaining adhesive to achieve an acceptable level of SBS.…”

Fourier-transform infrared spectroscopy/attenuated total reflectance analysis for the degree of conversion and shear bond strength of Transbond XT adhesive system

“…LED technology is used for the polymerization of light-initiated dental materials 2. LEDs use junctions of doped semiconductors to generate light.…”