Microleakage in ceramic inlays luted with different resin cements.
OBJECTIVE
The objective of this in vitro study was to evaluate the microleakage in ceramic inlays using different resin cements with margins in enamel and cementum/dentin interfaces.


METHODS
Standard Class II MOD inlay cavities were prepared in 32 noncarious human premolars. The cavities were randomly divided into 4 groups (n = 8):


METHODS
cavities were treated with Single Bond and incrementally filled with a composite resin (P60); Enforce group: feldspathic ceramic inlays were luted using Prime & Bond 2.1 and Enforce; RelyX group: inlays were cemented with Single Bond and RelyX ARC; Resin Cement group: ceramic inlays were bonded using Single Bond and Resin Cement. Ceramic inlays were previously treated with 10% hydrofluoric acid for 2 min, followed by silane application. After 7 days of storage in distilled water, teeth were submitted to thermocycling. After applying nail varnish, specimens were immersed in 2% aqueous solution of methylene blue for 8 h. After washing, teeth were cut into three sections through the restorations, and the leakage was assessed using a standardized score.


RESULTS
Data were submitted to statistical analysis using nonparametric tests (Mann-Whitney and Kruskal-Wallis). Dye leakage at margins in enamel was statistically lower (p < 0.01) than at cementum/dentin interfaces. RelyX ARC performed better (p < 0.05) than resin cement (enamel) and composite restorations (cementum/dentin). No other statistical differences were observed.


CONCLUSIONS
Both the material and the substrate interface influenced microleakage of the ceramic inlays.
Mota
Cristiane Soares
CS
Brazilian Navy, Rio Grande, RS, Brazil.
Demarco
Flávio Fernando
FF
Camacho
Guilherme Brião
GB
Powers
John M
JM
D000134:Acid Etching, Dental; D000538:Aluminum Silicates / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry*; D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry; D003737:Dental Cavity Preparation; D003739:Dental Cementum / Q000648:ultrastructure; D003743:Dental Enamel / Q000648:ultrastructure; D003763:Dental Leakage / Q000145:classification*; D018772:Dental Marginal Adaptation; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D007284:Inlays; D008422:Materials Testing; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D017680:Potassium Compounds / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry; D018709:Statistics, Nonparametric; D013499:Surface Properties; D013997:Time Factors
D000538:Aluminum Silicates; D004396:Coloring Agents; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C103503:EnForce-Sure Cure; D011109:Polymethacrylic Acids; D017680:Potassium Compounds; C425843:Prime and Bond NT; C462240:RelyX ARC; D019279:Resin Cements; D012821:Silanes; C115612:single bond; C016447:feldspar; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate