title: Microleakage of different resin composite types.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the microleakage of Class V cavity preparations restored with three different types of resin composite and an ormocer.
  
  
  METHODS
  Forty Class V cavities were prepared in buccal and lingual surfaces of 20 recently extracted molar teeth. The occlusal margin of each restoration was on enamel and the gingival margin on dentin. Teeth were randomly assigned to four groups of 5 teeth each and restored as follows: Group I, flowable resin composite (Tetric Flow); Group II, hybrid resin composite (Z100); Group III, packable resin composite (Solitaire 2); Group IV, organically modified ceramics-ormocer (Admira). In all groups, the manufacturers' instructions were strictly followed. All restorative resin composite materials were placed in one increment. All teeth were then immersed in 0.5% basic fuchsin solution for 24 hours after thermocycling (200 cycles; between 4 degrees C to 60 degrees C). The teeth then were longitudinally sectioned and observed under a stereomicroscope. The degree of dye penetration was recorded and analyzed with the Kruskal-Wallis and Mann-Whitney tests.
  
  
  RESULTS
  No statistically significant differences in microleakage were observed between groups either on enamel or dentin.
  
  
  CONCLUSIONS
  All restorative materials demonstrated equal effectiveness in reducing microleakage.
authors.affiliation: Hacettepe University, Faculty of Dentistry, Department of Conservative Dentistry, Sihhiye, Ankara, Turkey. ruyay@hacettepe.edu.tr
authors.forename: A Rüya
authors.initials: AR
authors.lastname: Yazici
authors.forename: Ciğdem
authors.initials: C
authors.lastname: Celik
authors.forename: Gul
authors.initials: G
authors.lastname: Ozgünaltay
mesh_terms: D002516:Ceramics / Q000737:chemistry*; D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry*; D003737:Dental Cavity Preparation / Q000145:classification; D003743:Dental Enamel / Q000473:pathology; D003763:Dental Leakage / Q000145:classification*; D003793:Dental Restoration, Permanent / Q000145:classification*; D003804:Dentin / Q000473:pathology; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D063225:Organically Modified Ceramics; D012394:Rosaniline Dyes; D012821:Silanes / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry; D018709:Statistics, Nonparametric; D015040:Zirconium / Q000737:chemistry
chemical_list: D004396:Coloring Agents; D003188:Composite Resins; D008689:Methacrylates; D063225:Organically Modified Ceramics; D012394:Rosaniline Dyes; D012821:Silanes; D012833:Siloxanes; C113049:Solitaire composite resin; C083568:Z100 composite resin; C479084:admira; C452226:tetric flow composite resin; C025485:basic fuchsin; D012822:Silicon Dioxide; D015040:Zirconium