Optimal strategies for the application of an adhesive differ between enamel and dentin because differences in their composition. The development systems has mainly focused on bonding dentin, rather than enamel, by etching with phosphoric acid (PA). Dental technologies continue to rapidly advance, various have been developed since study Buonocore 1955. He introduced acid-etch technique. Then, et...

BACKGROUND AND AIM: According to the effect of the adhesive and substrate type on the bond strength, examination of the adhesive is required in all aspects. The aim of this study was to evaluate the shear bond strength of different adhesive systems to normal dentin (ND) and caries affected dentin (CAD) in permanent teeth. METHODS: Thirty extracted molars with small occlusal caries were selected...

UNLABELLED A widely used artificial aging methodology is thermo-cycling. The ISO TR 11450 standard (1994) recommends 500 cycles in water between 5 and 55 degrees C. Recent literature revealed that more cycles are needed to mimic long-term bonding effectiveness. Furthermore, the artificial aging effect induced by thermo-cycling is not clearly established. Two underlying mechanisms can be advance...

PURPOSE The purpose of this prospective randomized controlled clinical study was to evaluate the clinical performance of a "mild" two-step self-etching adhesive, Clearfil SE, in Class V restorations after 5 years of clinical functioning. MATERIALS AND METHODS Twenty-nine patients received two or four restorations following two randomly assigned experimental protocols: (1) a mild self-etching ...

OBJECTIVE Recently, self-etching fissure sealants have been introduced to reduce technical sensitivity; however, their efficacy should be assessed. The aim of this study was to assess of the microshear bond strength of self-etching and conventional fissure sealants. MATERIALS AND METHODS Thirty non-carious third molars were randomly divided into three groups (N=10). Microcylinders of Concise ...

Background and Aim: Microleakage is a drawback of composite restorations and it is more noticeable in dentinal walls. Despite advances in dentin bonding agents, no adhesive can completely eliminate microleakage and provide a hermetic seal. This study aimed to compare microleakage of three resin bonding agents namely a universal adhesive, two-step self-etch system and two-step total-etch system....

Alloying base contacts directly through an InGaP emitter layer provides excellent passivation of the GaAs base in HBTs. Processes which utilize this ledge formation scheme and a self-aligned, wet-chemical basecollector etch can suffer degradation in DC performance. Layouts with a hexagonal emitter can circumvent any DC performance degradation because the base electrode can be used as the etch m...