Bond strength of brackets bonded with an adhesion promoter

Abstract

Materials and methods Enhance-L.C. was used with one of the manufacturer's recommended adhesives, Light-Bond, and with a second from another manufacturer, Transbond-XT. One hundred premolars were divided into four groups of 25 premolars: 1)Transbond-XT, 2) Transbond-XT/Enhance-L.C., 3) Light-Bond, 4) Light-Bond/Enhance-L.C. Main outcome measures Shear bond strength was evaluated with a universal test machine and the adhesive remaining after debonding was determined using image analysis equipment. Results Enhance-L.C. did not significantly increase the bond strength of either of the two systems (P > 0.008). However, LightBond/Enhance-L.C. provided a bond strength significantly greater (P < 0.008) than Transbond-XT and Transbond-XT/Enhance-L.C. Light-Bond also left significantly (P < 0.05) less adhesive remaining on the enamel than Transbond-XT, whether or not either of the systems were used with Enhance-L.C. Conclusions The use of Enhance-L.C with Light-Bond is to be recommended whenever extra bond strength is needed.Bracket bond failure is one of the most frustrating ocurrences in orthodontic practice. The consequences include an increase in treatment time, additional costs in both materials and personnel, and additional patient visits.

Effect of water contamination on the shear bond strength of five orthodontic adhesives

“…However, controversy over the results obtained with these products persists. Some studies have observed bond strength values similar to those achieved using the traditional acid-etch technique (5). Others have found that the bond strength of self-etching primers was lower (6) than when conventional procedures were followed.…”

Considerations in Orthodontic Bracket Adhesion to Hypomineralized Enamel

“…27,28,30 Self etching primer systems have also been reported to produce good ARI scores as compared to traditional acid-etch technique. [46][47][48] The removal of the residual adhesive can be accomplished via debonding pliers, ultrasonic scaler, high-speed tungsten carbide bur or by low-speed tungsten carbide bur Debonding pliers cause the least enamel loss, however more residual adhesive remained. 48 The least enamel loss was reported to occur with self-etching primer and after enamel clean-up with a slow-speed tungsten carbide bur with water.…”

“…The use of conventional etching and priming is discouraged since phosphoric acid, may cause more enamel loss than self etching primers. 47,48 This might reduce adhesion to hypomineralized enamel, because of inadequate micro-tag formation, consequential to the formation of little intercrystal porosity. 19 Other possible effects of severe enamel loss are: increased micro leakage around brackets with potential connection between enamel surface and the subsurface opacities, which might produce either an objectionable color change following extrinsic staining or a higher risk for demineralization and postoperative sensitivity.…”

Influence of Self-etchant Application Time on Bracket Shear Bond Strength

“…[12][13][14] While these conditioners were initially developed for use on dentin, researchers have determined that adhesive systems combining conditioning and priming can be successfully used to bond orthodontic brackets to enamel. [15][16][17] It has been demonstrated that SBSs of brackets bonded using different self-etch primers (SEPs) were not significantly different from brackets bonded with the conventional acid-etch technique. 15,17 As each SEP is unique in formulation and conditioning aggressiveness, the manufacturers of these products typically recommend using a specific conditioning time and method to achieve optimal results.…”

“…[15][16][17] It has been demonstrated that SBSs of brackets bonded using different self-etch primers (SEPs) were not significantly different from brackets bonded with the conventional acid-etch technique. 15,17 As each SEP is unique in formulation and conditioning aggressiveness, the manufacturers of these products typically recommend using a specific conditioning time and method to achieve optimal results. While the recommended protocols usually provide satisfactory results, it was reported that significantly less leakage was found in class V restorations when an SEP was used for twice the manufacturer's recommended application time.…”