microleakage in class ii composite restorations ... - ePrints@USM

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microleakage (D'Alpino et al., 2006a). For all these reasons, this technology wasutilized to detect microleakage in this study.1.2 Statement of ProblemDue to increase patient’s demand for aesthetic, the use of adhesive restorations forposterior teeth is becoming very popular these days (Mjor and Gordan, 2000). Due tothis there is a tendency to simplify bonding procedure to reduce the clinical time andimprove the longevity of the restoration. Over time, several changes have been made informulation to produce materials that enhance clinical success. The latest innovationsare the development of dental composites based on nanotechnology. However,problems, such as wear, technique sensitivity and microleakage still the concern whenresin-based composite restorations are placed in teeth. Since the nanocompositematerials have been around for only a short period, no independent research data is yetavailable (Ure and Harris, 2003). Therefore, the aim of this in vitro study was toinvestigate the microleakage in Class II restorations restored with self-etch, one-stepadhesives and nanocomposites.1.3 Justification of StudyDue to increased patients demand for aesthetic restorations and the many availabilityof products in the market, it is necessary to evaluate the quality and reliability of thenew adhesive systems and new nano-composite materials in reducing the microleakageof composite restorations through laboratory investigation.Since the self-etch, one-step, adhesive systems and nanocomposite materials are usedon patients by the students and the clinicians at the dental school of Universiti Sains4
Malaysia, it is important to study its efficacy in reducing the microleakage in class IIcomposite restorations.In addition, the result of the study will provide the dental health service providerswith some knowledge that will help them select better treatment modalities in order toprovide longer lasting restorations to their patients.1.4 Objective of Study1.4.1 General ObjectivesThe purpose of this in vitro experimental study is to evaluate the efficacy of self-etch,one-step, one-component adhesive systems and nanocomposites in reducing themicroleakage of class II composite restorations, in relation to the total-etch adhesivesand microhybrid composites using confocal laser scanning microscope (CLSM).1.4.2 Specific ObjectivesFirst objective: To compare the microleakage of self-etch, one-step, one-componentadhesive systems (G Bond, GC, Japan) in class II composite restorations with the totaletchadhesive systems (Adper Single Bond 2, 3M ESPE, USA).Second objective: To compare the microleakage of class II composite restorationsrestored with nano-composite material (Filtek Z350, 3M ESPE, USA) and microhybridcomposite material (Z250, 3M ESPE, USA).Third objective: To compare the microleakage of the nano-composite material (FiltekZ350, 3M ESPE, USA) bonded with self-etch, one-step, one-component adhesivesystem (G Bond, GC, Japan) with other study groups (1,2 ,and 3).5
Page 1 and 2: MICROLEAKAGE IN CLASS II COMPOSITE
Page 3 and 4: DEDICATIONTo my mother and my fathe
Page 5 and 6: TABLE OF CONTENTSPageDEDICATION ...
Page 7 and 8: 2.4.4 Confocal Laser Scanning Micro
Page 9 and 10: REFERENCES ........................
Page 11 and 12: LIST OF FIGURESPageFig. 2.1 Adhesiv
Page 13 and 14: KEBOCORAN MIKRO DALAM TAMPALAN KOMP
Page 15 and 16: MICROLEAKAGE IN CLASS II COMPOSITE
Page 17 and 18: CHAPTER ONEINTRODUCTION1.1 Backgrou
Page 19: data regarding microleakage of nano
Page 23 and 24: CHAPTER TWOLITERATURE REVIEW2.1 Mic
Page 25 and 26: dental restoratives, and the macros
Page 27 and 28: plasticization, microcrack formatio
Page 29 and 30: duration of appropriate exposure. S
Page 31 and 32: microleakage when they were subject
Page 33 and 34: Fluorescent dyes were used by many
Page 35 and 36: attached to the etched area and he
Page 37 and 38: However, (Tay and Pashley, (2005) s
Page 39 and 40: popularity. Although adhesives that

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