DISSERTATION - SYNOPSIS
DR SHETTY GAUTAM VISHWANATH
POST GRADUATE STUDENT
DEPARTMENT OF CONSERVATIVE DENTISTRY
AND ENDODONTICS
A.J.INSTITUTE OF DENTAL SCIENCES
MANGALORE.
BATCH 2009-2010
Rajiv Gandhi University of Health Sciences, Bangalore,
Karnataka
ANNEXURE II
PROFORMA FOR REGISTRATION OF SUBJECTS FOR DISSERTATION
1. / Name of the CandidateAnd Address
(in block letters) / DR SHETTY GAUTAM VISHWANATH POST GRADUATE STUDENT.
DEPARTMENT OF CONSERVATIVE DENTISTRY AND ENDODONTICS.
A.J.INSTITUTE OF DENTAL SCIENCES.
N.H 17, KUNTIKANA,
MANGALORE-575004
2. / Name of the institution / A.J. INSTITUTE OF DENTAL SCIENCES,
N.H 17, KUNTIKANA,
MANGALORE-575004
3. / Course of study and subject / MASTER OF DENTAL SURGERY, CONSERVATIVE DENTISTRY AND ENDODONTICS
4. / Date of admission to course / 20 MAY 2009
5. / Title of the topic: / “Effect of flowable material on the microleakage in the occluso proximal restoration that extends apical to cemento-enamel junction”
6. / Brief resume of the intended work:
6.1 Need for the study
Newer composite restorative materials are in the market along with newer bonding systems. The material of choice for class II restorations from the esthetic point of view is still composite restorative resins. With the introduction of self etching primers the procedure has become simple as far as clinical procedures are concerned. Microleakage with even the most modern composite resins is a clinical challenge that every restorative dentist faces everyday. In the clinical area the resins are placed against three different dentally related tissues that includes enamel, dentin and cementum. Microleakage is one of the parameters for evaluation of composite resins. This ex vivo study is designed to investigate the thin layer of flowable composite between dentin and the composite resins including cementum on the microleakage in occluso-proximal restorations.
6.2 Review of literature:
1. M Sadeghi, C D Lynch
The Effect Of Flowable Materials On The Microleakage Of Class II
Composite Restorations That Extend Apical To The Cement-Enamel Junction.
Operative dentistry 2009;34(3):306-311
This is an in-vitro study investigating the effect of a thin layer of flowable composites on microleakage occurring in class II packable and nano filled composite restorations that extends to the cemento-enamel junction. Standardized class two slot cavity prepared on seventy two extracted non carious premolar with gingival margin placed one mm apical to CEJ. Divided into two groups and restored with a packable composite or a nano filled composite with or without flowable composite. Half of the sample cured with QTH and the other half with LED. Two weeks incubation period at 37 degree centigrade in distilled water then thermocycled at 5˚-55˚C immersed in 0.5% basic fuschin dye for twenty hours sectioned observed and graded according to microleakage.
This concludes that packable composites have significantly less microleakage than nanofilled composite with and without flowable liner. QTH and LED does not show any difference.
2. S Koubi, A Raskin, J Dejou, I About et al
Effect fo dual cure composite as dentin substitute on marginal integrity of class II Open-sandwich restorations.
Operative dentistry 2009;34(2):150-156.
This study aims to compare the marginal adaptation of class I open sandwich restoration with RM GIC versus a dual cured composite as dentin substitute.
Teeth are assigned in two groups of twenty five each- dual cure composite with one resin modified GIC with a light cure composite.
This concluded that RM GIC remains the best intermediate material when open sandwich restoration are indicated as they show minimum microleakage
3. ZISKIND, D., ADELL, IL, TEPEROVICH, E. PERETZ
The effect of an intermediate layer of flowable composite resin on microleakage in packable composite restoration
International journal of pediatric dentistry 2005;15(5):349-354.
The aim of the present study was to evaluate the effect of a thin layer of flowable composite on microleakage in class II direct packable composite resin restoration on young permanent teeth
Divided into 2 groups:-
· Composite and alert/flow-it flowable composite
· Pyramid/aeliteflo
The result showed no significant difference between the control and experimental group.
This takes us to the conclusion that the use of flowable composite does not reduce the microleakage
4. Loguercio Alessandro Dourado; DE Oliveira Bauer Jose Roberto; REIS Alessandra; Grande Rosa Helena Miranda
In vitro microleakage of packable composites in class II restorations
Quintessence international 2004;35(1):29-34
This study aims to evaluate the microleakage in class II resin restorations at different margined and polymerization shrinkage of the composites used.
They divided the samples in four standardised groups(single bond+p60, prime and bond NT+ surefil, bond-1 +alert, prime and bond 2.1 +TPH.
The results evaluated through ANOVA test and Tukeys test showed that only packable composite showed lower polymerized shrinkage as compared to hybrid resin.
5. Ferrari, m. ,Goracci C. , Fabianelli A
Sealing ability of packable resin composite in class II restoration
Journal of adhesive dentistry 2003; 5(3):217-223.
This study is to evaluate the marginal adaptation of ten packable composite resin in combination with proprietary adhesive systems in class II restoration.
This study gave the results that when all the groups were compared for microleakage at the occlusal margin, the specimen treated with etch 3.0 and definit exhibits the worst adaptation in all the groups.
This concludes that the application of thin layer of flowable composite at cervical margin as a liner underneath the packable composite enhanced the marginal adaptation of the restoration. The use of a self etching primer to condition the dental substrate resulted at the occlusal margin in greater microleakage than when phosphoric acid was applied.
6.REZZENDE PERIS Alessandra; DUARTE Sillas, FERRAREZI DE ANDRADE Marcelo
Evaluation of marginal microleakage in class II cavities: effect of microhybrid, flowable and compactable resins.
Quintessence international 2003;34(2):93-98
This study aims to evaluate the microleakage on the cementum/dentin and enamel surface in class II restoration using different types of composites.
Groups:-
· adhesive system+ microhybrid resin composite Z100
· adhesive system + compactable resin composite Prodigy condensable
· adhesive system+ flowable resin composite revolution+Z100 resin composite.
· Adhesive system + revolution fluid resin + compactable resin composite prodigy condensable
Results evaluated under Kruskall-Wallis test showed none of the materials was able to eliminate the marginal microleakage at the cervical wall; the application of a low viscosity resin composite significantly decreased the microleakage.
6.3 Objectives of the study:
The objective of the study is to check the effect of flowable material on the microleakage in the occluso-proximal restoration that extends apical to cemento-enamel junction and thus find a suitable material with least microleakage
7 / Material and methods:
7.1 Source of data: Fifty freshly extracted premolar teeth for orthodontic purposes will be collected, not less than one month from the start of the experiment, from the Department of Oral and Maxillofacial Surgery, A.J.
Institute of Dental Sciences and from private dental clinics in Mangalore and surrounding areas and will be stored and surfaced adhering to CDC infection control protocols global.
7.2 Methods of collection of data(including sampling procedure,if any)
Selection of Teeth:
Fifty freshly extracted premolar teeth which will be stored, surfaced and grouped randomly into four experimental groups consisting of ten teeth in each group and ten in control group
Methodology: Fifty extracted premolar teeth which will be stored, surfaced and grouped randomly into four experimental groups consisting of ten teeth in each group and one control group. The experimental groups are:
1. Flowable composite liner on axial and gingival seat with Xeno III and composite.
2. Without Flowable composite liner on axial and gingival seat with Xeno III + Filtek Z350.
3. Open sandwich technique with Xeno III + Filtek Z350
4. Close sandwich technique with GIC FUJI II base on axial wall and pulpal floor with Filtek Z350 with Xeno III bonding system.
Control group is
· Entire cavity with Filtek Z350 without bonding agent.
Class II cavities on the teeth will be prepared with gingival margins placed 1mm apical to CEJ. Cure with LED with two weeks incubation period at 37 degrees Celsius in distilled water, then thermocycled at 5˚-55˚C immersed in 0.5% basic fuschin dye for 24 hours. Samples will be sectioned, observed and graded according to microleakage.
Microleakage will be examined at the gingival margin using a stereomicroscope under 10 X magnification.
The statistics will be prepared with ANOVA and Tukey’s tests
7.3 Does the study require any investigations or interventions to be
conducted on patients or other humans or animals? If so, please.
describe briefly.
Not applicable
7.4 Has ethical clearance been obtained from your institution in case
of 7.3?
Not applicable
INVESTIGATION DESIGN
8. / List of references:
1. M Sadeghi, C D Lynch
The effect of flowable materials on the microleakage of class 2
composite restorations that extend apical to the cement-enamel junction.
Operative dentistry,2009;34(3):306-311
2. S Koubi, A Raskin, J Dejou, I About et al
Effect of dual cure composite as dentin substitute on marginal integrity of class ii open-sandwich restorations.
Operative dentistr,2009;34(2):150-156.
3. Loguercio Alessandro Dourado; DE Oliveira Bauer Jose Roberto; REIS Alessandra; Grande Rosa Helena Miranda
In vitro microleakage of packable composites in class II restorations
Quintessence international, 2004;35(1):29-34
4. REZZENDE PERIS Alessandra; DUARTE Sillas, FERRAREZI DE ANDRADE Marcelo
Evaluation of marginal microleakage in class II cavities: effect of microhybrid, flowable and compactable resins.
Quintessence international (2003);34(2):93-98
5. ZISKIND, D., ADELL, IL, TEPEROVICH, E. PERETZ
The effect of an intermediate layer of flowable composite resin on microleakage in packable composite restoration
International journal of pediatric dentistry,(2005);15(5):349-354
6. Ferrari, m. ,Goracci C. , Fabianelli A
Sealing ability of packable resin composite in class II restoration
Journal of adhesive dentistry(2003);5(3):217-223.
9. / Signature of candidate
10. / Remarks of the guide:
11. / Name & Designation of
(in block letters):
11.1 Guide: / DR AFTAB DAMDA
READER
DEPARTNENT OF CONSERVATIVE AND ENDODONTICS
11.2 Signature:
11.3 Co-Guide (if any)
11.4 Signature:
11.5 Head of Department / DR B. SURESHCHANDRA
PRINCIPAL, PROFESSOR AND HOD
DEPARTMENT OF CONSERVATIVE DENTISTRY AND ENDODONTICS
11.6 Signature
12. / 12.1 Remarks of the Chairman &
Principal:
12.2 Signature