title: Comparative evaluation of shear bond strength and microleakage of tricalcium silicate-based restorative material and radioopaque posterior glass ionomer restorative cement in primary and permanent teeth: an in vitro study.
abstract: BACKGROUND
  Restoration of carious primary molars is still a major concern while treating the young children that too in deep carious lesion which extends below the cemento-enamel junction (CEJ) where pulp protection and achieving adequate marginal seal are very important to prevent secondary caries. The needs were met with the development of new materials. One such of new bioactive material is tricalcium silicate-based restorative material (Biodentine), recommended for restoring deep lesions.
  
  
  OBJECTIVE
  To evaluate and compare shear bond strength and microleakage of tricalcium silicate-based restorative material (Biodentine) and glass ionomer cement (Fuji IX GP) in primary and permanent teeth.
  
  
  METHODS
  Occlusal surface of crowns were ground flat. PVC molds were stabilized over flat dentin surface and filled with tricalcium silicate-based restorative material (Biodentine)/glass ionomer cement (Fuji IX GP) according to group ascertained. Shear bond strength was evaluated using universal testing machine (INSTRON). Standardized Class II cavities were prepared on both primary and permanent teeth, and then restored with tricalcium silicate-based restorative material (Biodentine)/glass ionomer cement (Fuji IX GP) according to group ascertained, over which composite resin material was restored using an open sandwich technique. Microleakage was assessed using dye penetration. Microleakage was examined using a stereomicroscope.
  
  
  RESULTS
  RESULTS showed that glass ionomer cement (Fuji IX GP) exhibited better shear bond strength than tricalcium silicate-based restorative material (Biodentine). Mean microleakage score for glass ionomer cement (Fuji IX GP) in permanent teeth was 1.52 and for primary teeth was 1.56. The mean microleakage for tricalcium silicate-based restorative material (Biodentine) in permanent teeth was 0.76 and for primary teeth was 0.60. Glass ionomer cement (Fuji IX GP) exhibited more microleakage than tricalcium silicate-based restorative material (Biodentine), which was statistically significant both in permanent (P = 0.02) and primary (P = 0.006) teeth.
  
  
  CONCLUSIONS
  Shear bond strength of glass ionomer cement (Fuji IX GP) is greater than tricalcium silicate-based restorative material (Biodentine) in both primary and permanent teeth. Tricalcium silicate-based restorative material (Biodentine) exhibited less microleakage compared to glass ionomer cement (Fuji IX GP) in both primary and permanent molars.
authors.affiliation: Department of Pedodontics and Preventive Dentistry, Ragas Dental College and Hospital, Chennai, Tamil Nadu, India.
authors.forename: Vignesh Guptha
authors.initials: VG
authors.lastname: Raju
authors.forename: Nilaya Reddy
authors.initials: NR
authors.lastname: Venumbaka
authors.forename: Jayanthi
authors.initials: J
authors.lastname: Mungara
authors.forename: Poornima
authors.initials: P
authors.lastname: Vijayakumar
authors.forename: Sakthivel
authors.initials: S
authors.lastname: Rajendran
authors.forename: Arun
authors.initials: A
authors.lastname: Elangovan
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry*; D003763:Dental Leakage; D003793:Dental Restoration, Permanent; D005899:Glass Ionomer Cements; D006801:Humans; D066298:In Vitro Techniques; D033081:Shear Strength; D017640:Silicates / Q000737:chemistry*
chemical_list: D017610:Calcium Compounds; D005899:Glass Ionomer Cements; D017640:Silicates; C506393:tricalcium silicate