Microleakage of ceramic inlays luted with different resin cements and dentin adhesives.
BACKGROUND
Despite recent advances in adhesive dentistry, resin cement/dentin adhesive combinations are not able to prevent microleakage in ceramic inlays. Marginal quality of tooth-colored restorations in large Class II cavities is satisfactory in enamel margins, but microleakage in dentin margins remains a concern.


OBJECTIVE
The purpose of this study was to evaluate the microleakage of all-ceramic inlays luted with 2 dual-polymerizing resin cements or 1 autopolymerizing resin cement in combination with different dentin adhesives.


METHODS
One hundred and twenty extracted human mandibular third molars were used in this study. Teeth were prepared to receive Class II MOD inlays with enamel gingival margins on 1 proximal surface and dentin gingival margins on the other surface. One hundred and twenty prepared teeth were divided into 3 groups of 40; 1 group for each resin cement: RelyX ARC, Variolink II, or Panavia 21. Each of the 3 groups were further divided into 4 dentin adhesive groups; Single Bond, ExciTE DSC, ED Primer, or Admira Bond. Each of the resin cements were used in combination with the 4 dentin adhesives, and IPS Empress ceramic inlays were placed with 12 different cement/adhesive combinations. After 1000 thermal cycles in a 5 degrees -55 degrees C water bath with a dwell time of 30 seconds, all specimens were subjected to cyclic axial mechanical loading. Then the restored teeth were stored in 0.5% basic fuchsin solution for 24 hours. The extent of dye penetration along the margins was measured with a stereomicroscope at x40 magnification. The data were evaluated statistically using repeated-measures ANOVA and Duncan tests (alpha=.05).


RESULTS
Microleakage at dentin margins was greater than that at enamel margins (P<.05) for all groups. Variolink II and RelyX ARC resin cements showed significantly lower microleakage results than Panavia 21 with all dentin adhesives in enamel margins. For dentin margins, Variolink II/Admira Bond combination showed the lowest microleakage value in dentin (P<.05).


CONCLUSIONS
The overall microleakage at the enamel margins was significantly less than at the dentin margins (P<.05). Panavia 21 showed higher microleakage values than Variolink II and RelyX ARC in enamel margins.
Uludag
Bulent
B
Department of Prosthodontics, University of Ankara, Faculty of Dentistry, Gazi University, Ankara, Turkey. bculudag@gmail.com
Ozturk
Ozge
O
Ozturk
A Nilgun
AN
D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry / Q000494:pharmacology; D003738:Dental Cements / Q000737:chemistry / Q000145:classification / Q000494:pharmacology; D003743:Dental Enamel / Q000187:drug effects; D003763:Dental Leakage / Q000517:prevention & control*; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents / Q000737:chemistry* / Q000145:classification / Q000494:pharmacology; D006801:Humans; D007284:Inlays / Q000379:methods*; D008334:Mandible; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry / Q000494:pharmacology; D008964:Molar, Third; D010710:Phosphates / Q000737:chemistry / Q000494:pharmacology; D011092:Polyethylene Glycols / Q000737:chemistry / Q000494:pharmacology; D011109:Polymethacrylic Acids / Q000737:chemistry / Q000494:pharmacology; D019279:Resin Cements / Q000737:chemistry* / Q000494:pharmacology; D018709:Statistics, Nonparametric; D013314:Stress, Mechanical
D003738:Dental Cements; D017220:Dentin-Bonding Agents; C500742:ED Primer II; C420130:Excite cement; D008689:Methacrylates; C093719:Panavia TPN-S; D010710:Phosphates; D011109:Polymethacrylic Acids; C462240:RelyX ARC; D019279:Resin Cements; C479085:admira bond; C115612:single bond; D003776:Dental Porcelain; C103502:Variolink; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate