scholarly journals Comparative Evaluation of Microleakage in Restored Primary Molars using Conventional and Chemomechanical Removal of Carious Tissue: An in vitro Study

2016 ◽  
Vol 6 (2) ◽  
pp. 108-113
Author(s):  
Yalamanchili Samatha ◽  
Charishma Birra ◽  
Sujatha Bandi ◽  
Mahesh Chinta ◽  
Sridevi Enuganti ◽  
...  
Keyword(s):  
Comparative Evaluation ◽  
In Vitro Study ◽  
Vitro Study ◽  
Primary Molars ◽  
Restorative Material ◽  
Tooth Discoloration ◽  
Group A ◽  
Caries Removal ◽  
Group B

ABSTRACT Background and objective Microleakage of restored teeth can be considered as a major contributing factor for the occurrence of tooth discoloration, secondary caries, deterioration of restorative material, postoperative tooth sensitivity, and pulpal irritation. The objective of this study was to compare the microleakage of primary molars restored with conventional glassionomer cement (GIC) and Giomer after caries removal using conventional cavity preparation (CCP) and chemo-mechanical caries removal (CMCR) techniques. Materials and Methods Sixty extracted carious human primary molars were randomly assigned into three groups of 20 each based on the method of caries removal: Group A: CCP technique; group B: CMCR using Papacarie gel; and group C: CMCR using Carisolv gel. Each group was further divided into two of 10 teeth each according to the restorative material used – conventional GIC (Fuji II) and Giomer (Beautifil II). The restored teeth were thermocycled, immersed in methylene blue dye, sectioned, and examined under stereomicroscope to elicit the dye penetration scores. Results The results demonstrated that none of the restorative materials were free from microleakage. In Fuji II samples highest microleakage scores were noticed in group A (2.09) followed by group B (0.64), and least in group C (0.27), which were statistically significant. However, in Giomer samples no statistical significant difference in microleakage scores was noticed among the three groups. Conclusion Chemo-mechanical caries removal technique showed less microleakage when compared to CCP technique and the marginal sealing ability of Giomer was superior to conventional GIC. How to cite this article Sankar AJS, Birra C, Bandi S, Chinta M, Enuganti S, Mukthineni S. Comparative Evaluation of Microleakage in Restored Primary Molars using Conventional and Chemomechanical Removal of Carious Tissue: An in vitro Study. J Contemp Dent 2016;6(2):108-113.

scholarly journals To Evaluate the Marginal Fit of Metal Copings Fabricated by Conventional Casting Procedure and Direct Metal Laser Sintering Technology – an In Vitro Study

2017 ◽  
Vol 05 (01) ◽  
pp. 039-046 ◽  
Author(s):  
Monica Sharma ◽  
Ajay Bansal ◽  
Sunny Panthi ◽  
Shefali Malik ◽  
Atulya Sharma
Keyword(s):  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Laser Sintering ◽  
Vitro Study ◽  
Direct Metal Laser Sintering ◽  
Marginal Fit ◽  
Significant Difference ◽  
Group A ◽  
Group B

Abstract Purpose: The purpose of this in vitro study was to evaluate marginal fit of cobalt- chromium (Co-Cr) copings fabricated by direct metal laser sintering system (DMLS) and conventional lost-wax technique (LW). Materials and method: Forty tooth preparations were carried out over extracted mandibular molars. They were divided into two groups A and B of 20 each. For group A Co-Cr copings were fabricated by direct metal laser sintering (DMLS) and for group B by lost wax technique (LW). Glass –ionomer cement (GIC) was used to tack the copings over their preparations. Marginal fit was then evaluated directly under the stereomicroscope. Results: The mean marginal gap of group A was 27.9 ± 2.4 μm and group B was 40.4 ±6 μm. Statistical analysis using t - test showed highly significant difference (P>.05) between the marginal mean of the DMLS (group A) compared to LW (group B). Conclusion: The DMLS copings demonstrated superior marginal fit compared to that of conventional Co-Cr casted copings.

scholarly journals Evaluation of the Effect of Water on Three Different Light Cured Composite Restorative Materials Stored in Water: An In Vitro Study

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Basawaraj Biradar ◽  
Sudharani Biradar ◽  
Arvind MS
Keyword(s):  
Water Absorption ◽  
Physical And Mechanical Properties ◽  
In Vitro Study ◽  
Vitro Study ◽  
Weight Changes ◽  
Significant Difference ◽  
Restorative Materials ◽  
Group A ◽  
Group B

Objectives. The objective of this in vitro study was to investigate whether weight gain or loss in the three different composites occurs due to water absorption when they are stored in water.Methods. The composite restorative materials selected for this study included a microfine hybrid (Synergy) and two nanofilled composite restorative materials (Ceram X and Filtek Supreme Ultra). Twenty specimens of each material were fabricated of each composite material. Group A: Filtek Supreme Ultra, Group B: Synergy, Group C: Ceram X. Then all the specimens were stored in 10 ml Distilled water containing test tubes and placed in incubator at 37°C for six weeks. The weight changes of these specimens were measured daily for the first week and later once a week for next five weeks by using an electrical analytical balance.Results.The data was analyzed by one-way analysis of variance and Student'sttest. All groups showed maximum amount of water absorption in the first week than gradual decrease in the water absorption from the second to the sixth week, as compared to the first week and there is no statistically significant difference between the groups tested.Conclusion. All the composite restorative material absorbs some amount of water. The water absorption of the composite may decrease the physical and mechanical properties of the composites; hence it is necessary to consider the type of the material before starting the treatment.

Microleakage and SEM Analysis of Flowable Resin Used as a Sealant Following Three Fissure Preparation Techniques – An in vitro Study

2011 ◽  
Vol 35 (3) ◽  
pp. 277-282 ◽  
Author(s):  
TR Chaitra ◽  
VV Subba Reddy ◽  
GM Devarasa ◽  
TL Ravishankar
Keyword(s):  
Statistical Significance ◽  
In Vitro Study ◽  
Sem Analysis ◽  
Vitro Study ◽  
Blue Dye ◽  
Sem Images ◽  
Group A ◽  
Excellent Method ◽  
Group B

Objective: Preventive procedures using pit and fissure sealants are one of the important aspects of pediatric dental practice. The objectives of this in vitro study were to comparatively evaluate microleakage and resin tag penetration of a flowable resin used as a sealant on molars after preparation with Conventional, Enameloplasty and Fissurotomy techniques. Method: A total of 48 teeth were divided into 3 groups (n-16). Group A(CST),Group B (EST),and Group C (FT). Following the fissure preparation sealant was applied as per manufacturer's instructions. 8 samples in each group were used for Microleakage and Resin tag analysis. Microleakage analysis was done under Stereomicroscope after Methylene blue dye immersion by using scoring system. The resin tag analysis was done by measuring the length of resin tags on scanning electron microscope (SEM) images consisting of 10μm scale taken under optical zoom of 2000 X. Results: Significantly lesser microleakage score (P<0.01) and longer resin tag penetration (P<0.001) observed in EST(mean score 0.5±0.53) & (12.19±1.93μm) when compared to CST(mean score 1.75±0.89) & (5.96±1.84μm)and FT (mean score 1.5±0.53) & (6.76±1.82μm) which showed more microleakage and short resin tags. No statistical significance between CST and FT was found. Conclusion: EST has proven to be an excellent method for preparation of pits and fissures when Flowable composite is used as a sealant because of its lesser microleakage and longer resin tag penetration.

Influence of prophylaxis on the microleakage of sealants: in vitro study

2002 ◽  
Vol 26 (4) ◽  
pp. 371-375 ◽  
Author(s):  
Ana Beatriz Alonso Chevitarese ◽  
Orlando Chevitarese ◽  
Ivete Pomarico Ribeiro de Souza ◽  
Roberto Braga de Carvalho Vianna
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
In Vitro Study ◽  
Optical Microscope ◽  
Vitro Study ◽  
Significant Difference ◽  
Group A ◽  
Group B ◽  
Scanning Electron

The aim of this study was to evaluate the influence of prophylaxis on the sealants microleakage in 30 premolars divided into: Group A, Group B and Group C. The teeth were analyzed using the optical microscope (OM) and at scanning electron microscope (SEM). There was a statitical significant difference among the groups regarding the presence of microleakage, but not with the presence of tags.

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