title: Coronal microleakage of four endodontic temporary restorative materials: an in vitro study.
abstract: OBJECTIVE
  The purpose of this study was to compare the sealing ability of the temporary restorative materials Cavit-G, Ketac Molar Easymix, and IRM with a new light-curing temporary material, Clip, using a methylene blue dye penetration test.
  
  
  METHODS
  Endodontic access preparations were prepared in 48 intact extracted human premolars. The teeth were divided into 6 groups, including positive and negative control groups. After access preparation, cotton pellets were placed in the pulp chamber so that the space remaining for the restoration was 4 mm. After thermal cycling for 500 cycles (5 degrees C-55 degrees C), the teeth were immersed in 2% methylene blue solution at neutral (pH = 7.0) in an incubator for leakage assessment. The teeth were sectioned, and the greatest depth of dye penetration was recorded. Marginal leakage was evaluated with a stereomicroscope.
  
  
  RESULTS
  Positive control sections exhibited complete dye penetration, and negative controls had none. In the experimental groups, the differences in the leakage scores of the Clip and Cavit-G groups and the other 2 groups were very marked. There were no statistically significant difference in marginal leakage between Cavit-G and Clip.
  
  
  CONCLUSIONS
  The new light-curing temporary material Clip seals against marginal leakage as effectively as Cavit when used as a temporary filling.
authors.affiliation: Department of Pediatric Dentistry, Faculty of Dentistry, University of Ankara, Ankara, Turkey.
authors.forename: Aytül
authors.initials: A
authors.lastname: Ciftçi
authors.forename: Didem Argun
authors.initials: DA
authors.lastname: Vardarli
authors.forename: Işil Saroğlu
authors.initials: IS
authors.lastname: Sönmez
mesh_terms: D004396:Coloring Agents; D001840:Dental Bonding; D003738:Dental Cements; D003763:Dental Leakage / Q000145:classification*; D003794:Dental Restoration, Temporary; D004338:Drug Combinations; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008751:Methylene Blue; D008768:Methylmethacrylates / Q000737:chemistry; D011145:Polyvinyls / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D018915:Root Canal Preparation / Q000379:methods; D013499:Surface Properties; D013696:Temperature; D015034:Zinc Oxide / Q000737:chemistry; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry
chemical_list: D004396:Coloring Agents; D003738:Dental Cements; D004338:Drug Combinations; D005899:Glass Ionomer Cements; C515713:Ketac Molar Easymix; D008689:Methacrylates; D008768:Methylmethacrylates; D011145:Polyvinyls; D019279:Resin Cements; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; C031667:IRM cement; C005044:hydroxyethyl methacrylate; C020873:Cavit G; D015034:Zinc Oxide; D008751:Methylene Blue