title: Structural reinforcement and sealing ability of temporary fillings in premolar with class II mod cavities.
abstract: OBJECTIVE
  To evaluate the capability to reinforce tooth structure and sealing ability of temporary filling materials in premolars with MOD cavities. The hypothesis is that temporary filling materials can concomitantly prevent microleakage and increase fracture resistance.
  
  
  METHODS
  Premolars received root canal treatment and MOD cavities. Cavities were restored with non- eugenol cement (CIM), glass ionomer cement (GIC) or light curable composite (BIO). Higid and without restoration were controls. Materials for flexual strength and teeth were tested for microleakage and compressive strength.
  
  
  RESULTS
  GIC and Higid presented similar compressive strength, higher than other groups. Bio and GIC presented similar flexural strength higher than BIO. CIM and BIO showed similar micro- leakage lower than GIC.
  
  
  CONCLUSIONS
  The hypothesis was rejected as filling materials tested failed to prevent microleakage and to increase fracture resistance concomitantly.
  
  
  CONCLUSIONS
  GIC may be considered to restore weakened teeth subjected to occlusal loads. BIO and CIM are better choices to microleakage in teeth not subjected to mechanical stresses.
authors.affiliation: Assistant Professor, Department of Endodontics, University of Passo Fundo-Faculty of Dentistry, RS, Brazil.
authors.forename: Yuri Dal
authors.initials: YD
authors.lastname: Bello
authors.affiliation: Resident, Department of Endodontics, University of Washington, School of Dentistry, WA, United States.
authors.forename: João Vicente
authors.initials: JV
authors.lastname: Barbizam
authors.affiliation: Assistant Professor, Department of Oral Sciences, National University of Singapore Faculty of Dentistry, Singapore.
authors.forename: Vinicius
authors.initials: V
authors.lastname: Rosa
mesh_terms: D001641:Bicuspid / Q000473:pathology*; D019245:Compressive Strength; D001840:Dental Bonding; D003737:Dental Cavity Preparation / Q000145:classification*; D003738:Dental Cements / Q000737:chemistry*; D003763:Dental Leakage / Q000145:classification; D003794:Dental Restoration, Temporary / Q000379:methods*; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D018583:Pliability; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry; D012390:Root Canal Therapy / Q000379:methods; D013314:Stress, Mechanical; D013696:Temperature; D013997:Time Factors; D014082:Tooth Fractures / Q000503:physiopathology
chemical_list: C584925:Bioplic; D003738:Dental Cements; D005899:Glass Ionomer Cements; D019279:Resin Cements; D012387:Root Canal Filling Materials; C100647:Vidrion-R