RESULTS Comparison of retention of class-V adhesive restorations as a measure to determine clinical bonding effectiveness of adhesives revealed that glass-ionomers most effectively and durably bond to tooth tissue .
Three-step etch- and -rinse adhesives and two-step self-etch adhesives showed a clinical ly reliable and predictably good clinical performance .
The clinical effectiveness of two-step etch- and -rinse adhesives was less favourable , while an inefficient clinical performance was noted for the one-step self-etch adhesives .
SIGNIFICANCE Although there is a tendency towards adhesives with simplified application procedures , simplification so far appears to induce loss of effectiveness .
OBJECTIVES The purpose of this paper was to review current literature on the clinical effectiveness of contemporary adhesives when used to restore cervical non-carious class-V lesions .
Restoration retention in function of time was recorded in order to find out if adhesives with a simplified application procedure are as clinical ly effective as conventional three-step adhesives .
Relation between water content in acetone/alcohol-based primer and interfacial ultrastructure.
OBJECTIVES This study investigated the ultrastructure of the resin-dentine interface when a two-bottle primer system containing NTG-GMA ( N(p-tolyl)glycine-glycidyl methacrylate ) and BPDM ( biphenyl dimethacrylate ) was used with different concentrations of water as a part of the primer solvent : ( I ) an experimental version of All-Bond 2 with no water in primer A ; ( II ) a commercial version of All-Bond 2 ( Bisco , Itasca , IL , USA ) with 5 % water in primer A ; and ( III ) a former version of All-Bond 2 with 17 % water in primer A. METHODS Thirty-six 1-mm thick dentine discs prepared from third permanent molar teeth were each conditioned with 10 % phosphoric acid for 20 s and rinsed for 20 s. They were r and omly divided into three groups : Group A , conditioned dentine surface air-dried for 30 s ; Group B , air-dried for 3 s ; and Group C , blot-dried so that the dentine surface remained visibly moist . The three categories of primers were applied to each disc in 8 - 10 coats , result ing in nine sub-groups . Discs in each sub-group were bonded together to form disc-pairs using a chemical cure resin , demineralized in ethylene diamine tetraacetic acid ( EDTA ) and prepared for transmission electron microscopic examination . RESULTS With the use of the water-free primer version , sub-optimal hybridization was observed whenever dentine was dried prior to bonding ( Groups IA and IB ) . In the 5 % water version , prolonged desiccation result ed in compromised hybridization ( Group IIA ) , while resin globules were observed on the surface of the hybrid layer when a moist technique was employed ( Group IIC ) . In the 17 % water version , surface blisters and globules characteristic of the ' overwet phenomenon ' were observed in Groups IIIB and IIIC . CONCLUSION Between the two extremes of a morphological spectrum of bonding conditions , the different primer versions exhibited different sensitivity ranges . There was a shift in the ' window of opportunity ' for optimal hybridization and tubular seal depending on the water content of the primer system investigated
RESULTS Comparison of retention of class-V adhesive restorations as a measure to determine clinical bonding effectiveness of adhesives revealed that glass-ionomers most effectively and durably bond to tooth tissue .
Three-step etch- and -rinse adhesives and two-step self-etch adhesives showed a clinical ly reliable and predictably good clinical performance .
The clinical effectiveness of two-step etch- and -rinse adhesives was less favourable , while an inefficient clinical performance was noted for the one-step self-etch adhesives .
SIGNIFICANCE Although there is a tendency towards adhesives with simplified application procedures , simplification so far appears to induce loss of effectiveness .
OBJECTIVES The purpose of this paper was to review current literature on the clinical effectiveness of contemporary adhesives when used to restore cervical non-carious class-V lesions .
Restoration retention in function of time was recorded in order to find out if adhesives with a simplified application procedure are as clinical ly effective as conventional three-step adhesives .