scholarly journals Marginal Adaptation of Different Bulk-fill Composites: A µ-CT Evaluation

2021 ◽  
Author(s):  
Rasha Al Sheikh
Keyword(s):  
Cyclic Loading ◽  
Composite Resin ◽  
Clinical Investigation ◽  
Class Ii ◽  
Marginal Adaptation ◽  
Cavity Preparation ◽  
Ct Evaluation ◽  
Interfacial Gap ◽  
Adaptation Ability ◽  
Tomography Analysis

In the last decade, bulk-fill materials were introduced to allow resin-based composites (CRs) in one layer (up to 4-5 mm thick) with optimum polymerization. Objectives: To evaluate the adaptation ability of different bulk-fill composites resin and restoration marginal integrity. Methods and Materials: A total of 28 caries-free and crack-free human molars underwent mesio-occlusal-distal cavity preparation. The mesial margins were prepared on enamel for each sample, and the distal margins were extended into dentin. Teeth were then randomly distributed into four groups (n = 7 per group) according to the composite resin used to restore the cavity. Three bulk-fill CRs—Smart Dentin Replacement Flow+ (SDR), Filtek™ One Bulk Fill (FBF), and Tetric® N-Ceram Bulk Fill (TBF)—and one conventional composite resin (CC)—Filtek™ Z350—were used. The teeth were then subjected to aging via thermocycling, followed by cyclic loading. Finally, the volumetric width of the interfacial gap at the tooth-restoration interface was measured using a microcomputed tomography analysis (µ-CT). Results: SDR demonstrated the smallest gap volume among all tested CRs, followed by CC in enamel and TBF in dentin after aging. FBF showed the highest gap volume. There was no statistically significant three-way interaction between surface, aging, and material (p > 0.05). Conclusion: Based on the results, it is safe to suggest the use of bulk-fill RBC in deep Class II cavities instead of conventional layered RBC; when dealing with dentin margins, though a further clinical investigation is required.

scholarly journals BULKFILL TECHNIQUES WITH INTERMEDIATE LAYER TO MARGINAL ADAPTATION RESTORATION OF CLASS II COMPOSITE RESIN

2021 ◽  
Vol 11 (1) ◽  
pp. 32
Author(s):  
Mochammad Raidjffan Zulkarnaen Tabona ◽  
Adioro Soetojo ◽  
Ira Widjiastuti
Keyword(s):  
Dental Caries ◽  
Intermediate Layer ◽  
Composite Resin ◽  
Class Ii ◽  
Base Layer ◽  
Marginal Adaptation ◽  
Layer Technique ◽  
Natural Teeth ◽  
Composite Resin Restorations ◽  
Resin Restorations

Background: Dental caries is a hard tissue disease caused by bacterial metabolic activity that causes demineralization, teeth that have caries should be filled in order to function again. One of the restorative materials closer to natural teeth is composite resin because it is the same colour as natural teeth and is easy to shape. As for the placement technique, bulkfill is also used because it is more time-efficient, and irradiation is accompanied by applying the restoration material in one batch. However, the bulkfill technique often causes micro-leakage of dental caries deposition. The intermediate layer is an intermediate layer used to prevent micro-leakage at the edges of the restoration as a base layer for restoration to create a good adaptation before applying packable composite resin. Therefore, bulkfill coating technique with the intermediate layer can reduce the risk of microleakage. Purpose: To describe the bulkfill technique with an intermediate layer against marginal adaptation with class II composite resin restorations. Review: The literature sources used in the preparation of the articles through several databases with descriptions. More journals say that micro-leakage in class II cavity deposition with the intermediate layer technique is better than the bulkfill technique because the intermediate layer technique has better bond strength than the bulkfill technique. If the Bulkfill technique is modified with the Intermediate layer technique, it can show good correlation and internal adaptation. Conclusion: Bulkfill technique with an intermediate layer against marginal adaptation with class II composite resin restorations can reduce the microleakage rate by reducing the polymerization's shrinkage strain.

scholarly journals The effect of composite resin preheating on marginal adaptation of class II restorations

2020 ◽  
pp. e682-e687
Author(s):  
F. Darabi ◽  
R. Tayefeh-Davalloo ◽  
S. Tavangar ◽  
F. Naser-Alavi ◽  
M. Boorboo-Shirazi
Keyword(s):  
Composite Resin ◽  
Class Ii ◽  
Marginal Adaptation

scholarly journals Nanohybrid and microfilled composite resin in Class II restoration of permanent molar teeth

2019 ◽  
Vol 12 (2) ◽  
pp. 94-98
Author(s):  
Hasan Ali ◽  
Md. Joynal Abdin ◽  
Noor Jahan Akhter ◽  
Mozammal Hossain
Keyword(s):  
Composite Resin ◽  
Clinical Performance ◽  
Class Ii ◽  
Single Step ◽  
Marginal Adaptation ◽  
Permanent Molar ◽  
Molar Teeth ◽  
Nanohybrid Composite ◽  
Composite Resin Restorations ◽  
Self Etch

The aim of this study was to compare the clinical performance of nanohybrid composite resin in Class II restorations placed with a one-step self-etch adhesive with that of microfilled composite resin of permanent posterior molar teeth. A total of 100 participants who received Class II restorations either with nanohybrid composite resin bonded with a single step self-etch adhesive or conventional microfilled composite bonded with a single step self-etch adhesive. All restorations were evaluated by using slightly modified USPHS criteria at baseline and after 3, 6 and 12 months. The results revealed that nanohybrid composite resin showed better clinical outcome than that of the conventional microfilled composite resin restorations in respect to retention and marginal adaptation at 12 months observation period. It can be concluded that nanohybrid is superior to conventional microfilled composite resin in respect to retention, and marginal adaptation of Class II restorations of permanent molar teeth.

Effect of Light Curing Units on Marginal Adaptation and Hardness of Class II Composite Resin Restorations

2007 ◽  
Vol 8 (7) ◽  
pp. 38-45 ◽  
Author(s):  
Larissa Maria Cavalcante ◽  
Alessandra Resende Peris ◽  
Luiz André Freire Pimenta ◽  
Nick Silikas
Keyword(s):  
Composite Resin ◽  
Resin Composite ◽  
Class Ii ◽  
Marginal Adaptation ◽  
Gap Formation ◽  
Vertical Slot ◽  
Light Curing ◽  
Composite Resin Restorations ◽  
Effect Of Light ◽  
Resin Restorations

Abstract Aims The aim of this study was to test the influence of different curing protocols on dentin marginal adaptation and the hardness of two composites. Methods and Materials Three light-curing-units (LCUs): Quartz-Tungsten-Halogen (QTH: 541mW/cm2), Argon-Ion-Laser (AL: 277mW/cm2), and Plasma-Arc-Curing (PAC: 1818mW/cm2) and two composites FiltekZ250 (F) and Tetric Ceram HB (TC) were tested. Sixty standardized “vertical-slot-Class II-cavities” were prepared at the mesial surface of bovine incisors and divided into six groups (n=10). Composites were placed using the Single Bond adhesive system and cured in 2 mm increments according to the manufacturers’ instructions. After polishing, epoxy replicas were processed for scanning electron microscopy (SEM) marginal adaptation analysis at 500x magnification. The specimens were then sectioned transversally to the dental long axis, embedded in polyester resin, then polished and submitted to the Knoop hardness test at gingival and occlusal portions of the restoration. Data were analyzed using two-way analysis of variance (ANOVA) and Tukey's test (p=0.05). Results The gap margins ranged between 4.3 to 5.8 μm, and no statistically significant differences were revealed in marginal adaptation for LCUs or for composites (p>0.05). Location influenced hardness (p≤0.01). The occlusal portion presented significantly higher KHN than the gingival portion for all composite-LCU combinations. Regardless of the LCU used, TC produced statistically significant lower hardness values (ranging between 82.8 to 110.7 KHN) than F (ranging between 105.9 to 117.3 KHN). Conclusions Hardness and gap formation were not dependent on the LCUs tested in this study. Different resin composite was found to be a significant factor with regards to hardness but not gap formation. Citation Cavalcante LM, Peris AR, Silikas N, Pimenta LAF. Effect of Light Curing Units on Marginal Adaptation and Hardness of Class II Composite Resin Restorations. J Contemp Dent Pract 2007 November; (8)7:038-045.

Effect of Cyclic Loading on Marginal Adaptation and Bond Strength in Direct vs Indirect Class II MO Composite Restorations

2008 ◽  
Vol 33 (5) ◽  
pp. 587-592 ◽  
Author(s):  
V. Aggarwal ◽  
A. Logani ◽  
V. Jain ◽  
N. Shah
Keyword(s):  
Cyclic Loading ◽  
Bond Strength ◽  
Clinical Relevance ◽  
Class Ii ◽  
Marginal Adaptation ◽  
Microtensile Bond Strength ◽  
Composite Restorations ◽  
Indirect Composite

Clinical Relevance Indirect composite restorations have better marginal adaptation than direct composite restorations, and cyclic loading has a more deteriorating effect on the marginal adaptation and microtensile bond strength of direct composite restorations than indirect composite restorations.

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