A comparative microleakage evaluation of three different base materials in Class I cavity in deciduous molars in sandwich technique using dye penetration and dentin surface interface by scanning electron microscope.
BACKGROUND
A major objective in restorative dentistry is the control of marginal leakage, which may occur because of dimensional changes or lack of adaptation of restorative material to the cavity preparation. Numerous techniques have been advocated to overcome polymerization shrinkage in composite restorations.


OBJECTIVE
This study investigated microleakage of three different bases under composite resin in sandwich technique using dye penetration and dentin surface interface using scanning electron microscope (SEM).


METHODS
Sixty extracted deciduous molars were stored in distilled water and Class I cavities with a width of about one-fourth of intercuspal distance and a depth of 0.5-1 mm below the dentino-enamel junction was prepared without bevels. In Group 1 - glass ionomer cement (GIC); Group 2 - mineral trioxide aggregate (MTA); Group 3 - Biodentine™ was placed as a base under composite. Teeth were longitudinally sectioned in two halves, through the centers of the restoration, immersed in 2% methylene blue and microleakage was evaluated under stereomicroscope and surface interface between base and dentin was evaluated under SEM.


RESULTS
Under the condition of in vitro study, less microleakage and less internal gaps were seen in Biodentine™ (0.00 ± 0.00 and 4.00 ± 1.59) group than MTA (0.00 ± 0.00 and 6.08 ± 1.82) and GIC (25.25 ± 6.57 and 14.73 ± 3.72, respectively) and showed very strong positive correlation between microleakage and internal gaps.


CONCLUSIONS
Biodentine™ exhibits superior marginal sealing ability as well as marginal adaptation under composite resin as compared to MTA and GIC.
Department of Pedodontics and Preventive Dentistry, Rishiraj College of Dental Sciences, Bhopal, Madhya Pradesh, India.
Babita
B
Niranjan
Department of Pedodontics and Preventive Dentistry, College of Dental Science, Karad, Maharashtra, India.
Nandihalli Devendrappa
ND
Shashikiran
Department of Pedodontics and Preventive Dentistry, People's College of Dental Sciences and Research, Bhopal, Madhya Pradesh, India.
Shilpy
S
Singla
Department of Pedodontics and Preventive Dentistry, RKDF College of Dental Science, Bhopal, Madhya Pradesh, India.
Ruchi
R
Thakur
Department of Periodontology and Oral Implantology, People's Dental Academy, Bhopal, Madhya Pradesh, India.
Aashutosh
A
Dubey
Department of Pedodontics and Preventive Dentistry, Rishiraj College of Dental Sciences, Bhopal, Madhya Pradesh, India.
Satish
S
Maran
D017607:Aluminum Compounds / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D003737:Dental Cavity Preparation / Q000145:classification / Q000379:methods*; D003738:Dental Cements / Q000737:chemistry*; D003743:Dental Enamel / Q000473:pathology; D003763:Dental Leakage / Q000000981:diagnostic imaging*; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000145:classification / Q000379:methods*; D003804:Dentin / Q000000981:diagnostic imaging; D004338:Drug Combinations; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning / Q000379:methods*; D008963:Molar / Q000000981:diagnostic imaging*; D010087:Oxides / Q000737:chemistry; D017640:Silicates / Q000737:chemistry; D013499:Surface Properties; D014094:Tooth, Deciduous / Q000000981:diagnostic imaging*
D017607:Aluminum Compounds; D017610:Calcium Compounds; D003188:Composite Resins; D003738:Dental Cements; D004338:Drug Combinations; D005899:Glass Ionomer Cements; D010087:Oxides; D017640:Silicates; C086631:mineral trioxide aggregate; C506393:tricalcium silicate