The effects of different adhesive agents on the shear bond strength of a self-adhesive resin cement.
OBJECTIVE
To compare the clinical success of a self-adhesive resin cement used in combination with different adhesive bonding systems with that of a conventional dual-cure resin cement.


METHODS
The study was performed with 136 freshly extracted molars embedded in acrylic resin blocks and 136 IPS e.max Press discs. Teeth and discs were randomly divided into four equal groups and cemented together using either RelyX ARC (ARC), RelyX Unicem (Unicem), RelyX Unicem + Adper-Prompt L-pop (L-pop), or RelyX and Unicem + Total-etch (Total-etch). Shear bond strength measurements were obtained before and after thermocycling. Following bond testing, the surfaces of one sample per subgroup (thermocycled and non-thermocycled), were assessed using scanning electron microscopy (SEM).


RESULTS
Among the non-thermocylced subgroups, ARC exhibited the highest bond strength values, followed by Total Etch, Unicem and L-pop. ARC also exhibited the highest bond strength values among the thermocycled subgroups, followed by Unicem, Total-etch, and L-pop. SEM analysis clearly revealed the negative effects of thermo-cycling on the mechanical properties of adhesive agents.


CONCLUSIONS
RelyX Unicem may be preferable in many cases because of its simplified application and reduced technique-sensitivity.
Department of Prosthodontics, Faculty of Dentistry, Ankara University, Ankara, Turkey.
Tolga
T
Pekperdahci
Yuksel
Y
Turkoz
Oguz
O
Ozan
Emre
E
Seker
D000179:Acrylates / Q000737:chemistry; D000269:Adhesives / Q000737:chemistry*; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002484:Cementation; D003793:Dental Restoration, Permanent; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D013696:Temperature
D000179:Acrylates; D000269:Adhesives; D017220:Dentin-Bonding Agents; D011109:Polymethacrylic Acids; C408584:Prompt L-Pop; C483701:Rely X Unicem; C462240:RelyX ARC; D019279:Resin Cements; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; C036658:acrylic acid