title: Microleakage of IPS empress 2 inlay restorations luted with self-adhesive resin cements.
abstract: OBJECTIVE
  To assess the microleakage of three self-adhesive and one etch-and-rinse resin cements when luting IPS Empress 2 (Ivoclar Vivadent, Liechtenstein) all-ceramic inlay restorations to the prepared cavities in extracted human molars.
  
  
  METHODS
  The cylindrical Class V cavities were prepared on the buccal surfaces of 40 extracted human third molars using diamond burs. The IPS Empress 2 ceramic inlays were placed with Multilink Sprint (Ivoclar Vivadent), RelyX Unicem (3M ESPE, USA), G-Cem (GC, Japan), or Variolink II (Ivoclar Vivadent) as the control group. After storage in distilled water at 37°C for 24 hours, samples were subjected to 1000 thermal cycles between baths of 5°C and 55°C, with a dwell time of 30 seconds. The microleakage scores were examined on the occlusal and gingival margins at 30× magnification after each sample was stained with 0.5% basic fuchsin and sectioned into three parts using a thin diamond blade (Isomet, Buehler, USA) (n=40). The extent of microleakage on both occlusal and gingival margins of the restorations was scored and recorded. The microleakage data were analyzed using Kruskall-Wallis and Mann-Whitney U-tests.
  
  
  RESULTS
  Statistically significant differences were observed between the groups in both margins according to the Kruskall-Wallis and Mann-Whitney U-tests (p<0.05). Microleakage scores on the occlusal margins were Variolink II < RelyX Unicem < G-Cem = Multilink Sprint. Microleakage scores on the gingival margins are Variolink II = RelyX Unicem < G-Cem < Multilink Sprint.
  
  
  CONCLUSIONS
  Self-adhesive resin cements displayed higher microleakage scores on the occlusal margins, whereas on the gingival margins RelyX Unicem showed comparable microleakage results with the control samples.
authors.affiliation: Ege University Bornova, Izmir, Turkey.
authors.forename: E
authors.initials: E
authors.lastname: Cal
authors.forename: E U
authors.initials: EU
authors.lastname: Celik
authors.forename: M
authors.initials: M
authors.lastname: Turkun
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D002484:Cementation / Q000379:methods*; D004396:Coloring Agents; D003737:Dental Cavity Preparation / Q000145:classification; D003743:Dental Enamel / Q000473:pathology; D003763:Dental Leakage / Q000145:classification*; D003776:Dental Porcelain / Q000737:chemistry*; D003804:Dentin / Q000473:pathology; D006801:Humans; D006858:Hydrofluoric Acid / Q000737:chemistry; D007284:Inlays; D018020:Lithium Compounds / Q000737:chemistry*; D008422:Materials Testing; D008964:Molar, Third; D019279:Resin Cements / Q000737:chemistry*; D012394:Rosaniline Dyes; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D019237:Tooth Cervix / Q000473:pathology; D014867:Water / Q000737:chemistry
chemical_list: D004396:Coloring Agents; C118557:Empress 2; C528107:G-Cem resin cement; D018020:Lithium Compounds; C483701:Rely X Unicem; D019279:Resin Cements; D012394:Rosaniline Dyes; C502351:multilink adhesive system; D014867:Water; D003776:Dental Porcelain; C103502:Variolink; C025485:basic fuchsin; D006858:Hydrofluoric Acid