objective: repair of an indirect restoration is usually preferred over its replacement. this study aimed to evaluate the effect of silane in different surface preparation techniques on the bond strength of direct to indirect composite resin.   methods: for this in vitro experimental study, 48 indirect composite cubes were fabricated, divided into 4 groups of 12 and subjected to the following pr...

objective: considering the use of triple antibiotic paste (tap) for root canal treatment of open apex teeth, this study aimed to assess the effect of tap and calcium hydroxide (ch) on bond strength of composite to dentin.   methods: this in-vitro study was conducted on 32 extracted human premolar teeth. after disinfection with 2% thymol solution, the enamel on the buccal surface of specimens wa...

introduction: the aim of this study was to evaluate the effect of various concentrations of naocl on shear bond strength of composite resin to dentin of primary teeth, prepared with laser and bur. methods: in this in vitro study, 48 primary molars were sectioned at mesiodistal direction and were randomly divided into 6 groups; g1: bur, g2: bur + naocl 2.5%, g3: bur + naocl 5.25%, g4: laser, g5:...

introduction: the aim of this in vitro study was to evaluate the effect of various irrigants on the push-out bond strength of calcium-enriched mixture (cem) cement and mineral trioxide aggregate (mta). methods and materials: a total of 140 dentin disks with a thickness of 1.5±0.2 mm and lumen size of 1.3 mm, were randomly divided into 12 groups ( n =10) and 4 control groups ( n =5). the lumen o...

the bond strength of adhesives in irrigated dentin behaves differently over time. the aim of this study was to evaluate the influence of long-term water storage and thermocycling on the microtensile bond strength of adhesive systems to dentin irrigated with endodontic solutions.sixty human molars were used after removal of the occlusal portion and exposure of the dentin by grinding. the specime...

introdouction: esthetic demands of patients have led to the introduction of tooth-colored restorations wherecomposite resins are bonded to the enamel using acid etch techniques. total etch adhesion systems are still considered as the gold standard among bonding systems. however, clinicians have a tendency to use adhesive systems with simpler application procedures. the aim of the present study ...

introduction: this study was performed to determine the shear bond strength of rebonded mechanically retentive ceramic brackets after recycling with erbium-doped yttrium aluminum garnet (er:yag) laser or sandblasting. methods: twenty-eight debonded ceramic brackets plus 14 intact new ceramic brackets were used in this study. debonded brackets were randomly divided into 2 groups of 14. one group...