Effect of repair systems on dentin bonding performance

Abstract

The purpose of this study was to investigate the influence of phosphoric acid etching, metal primer or silane coupling agent application on dentin bonding performance of a 2-step self-etch adhesive system. Human dentin surfaces were prepared and divided into four groups depending on the pre-treatment method: no pretreatment (Clearfil SE Bond 2, CONTROL); 40% phosphoric acid (K-Etchant GEL, K); metal primer (Alloy Primer, AP); or silane coupling agent (Porcelain Bond Activator, PB). The specimens were sectioned into beams, separated into 2 subgroups (n=20): no thermocyling or thermocycled (TC), and subjected to a µTBS test and an acid-base challenge for SEM observation. Statistically lower results were observed between K and AP groups, PB and CONTROL, and PB with/ without TC (p<0.05). SEM images at the dentin-adhesive interface revealed that all groups produced an acid-base resistant zone (ABRZ), with a funnel-shaped erosion under the ABRZ for the K group.

Evaluation of Different Surface Treatment Effects and Micromorphology on the Repair Bond Strength of the Aged Nanohybrid and Microhybrid Composites

“…This effect is seen in a clinical setting when the restoration is being repaired and enamel and dentine are sliced. The study assessed the relevance of this impact since it only employed composite blocks rather than composite restorations inside of teeth [16].…”

Acid-Base Resistant Zone in Teeth with the Direct Restoration Using Different Adhesive System Generations: A Systematic Review

“…The studies included in the systematic review evaluated the structure of the acid-base resistant zone (ABRZ) as in dentin [4,10,[13][14][15][16][17][18][20][21][22]24], so it is in enamel [8,16,19,23] (Table 1). Various adhesive systems and etching protocols were used in experimental tests, which are presented…”

“…Nikaido et al [16] Presence: in all groups The studies selected for the review examined the effect of the following 2-SEA on the formation of ABRZ: Clearfil SE Bond [8,14,15,17,18,[20][21][22], Optibond XTR [15] and three other studies used experimental 2-SEA [10,21,23]. In all samples of 2-SEA groups, the ABRZ was formed on the dentin and enamel.…”

“…Among the studies included in the review, the molecule of MDP is contained in the 1-SEA [4,[13][14][15]16,19] and the 2-SEA [8,10,14,15,17,18,[20][21][22][23]. The MDP-containing adhesives formed thicker ABRZ, both on enamel and on dentin, in comparison with adhesives that do not contain MDP.…”