Mechanical Properties and Polymerization Shrinkage of Composite Resins Light-Cured Using Two Different Lasers

2015 ◽  
Vol 33 (4) ◽  
pp. 213-219 ◽  
Author(s):  
Tae-Wan Kim ◽  
Jang-Hoon Lee ◽  
Seung-Hwa Jeong ◽  
Ching-Chang Ko ◽  
Hyung-Il Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Resins ◽  
Polymerization Shrinkage

scholarly journals Indicações e propriedades mecânicas das resinas compostas convencionais e resinas compostas do tipo bulk-fill: revisão de literatura

2021 ◽  
Vol 12 (1) ◽  
pp. 39
Author(s):  
Letícia Meinberg Pedrosa ◽  
Amanda De Oliveira Pinto Ribeiro ◽  
João Victor Frazão Câmara ◽  
Josué Junior Araujo Pierote
Keyword(s):  
Mechanical Properties ◽  
Clinical Performance ◽  
Composite Resins ◽  
Restorative Material ◽  
Central Theme ◽  
Inclusion Criteria ◽  
Exclusion Criteria ◽  
Polymerization Shrinkage ◽  
Dental Offices ◽  
Made In

Composite resins are restorative materials widely used in dental offices due to their mechanical properties, aesthetics and clinical performance. However, the polymerization shrinkage present in conventional composites is still a major limitation. In this context, resins called bulk-fill, or filling resins, were developed, which have the possibility of inserting a single increment in the dental cavity due to less polymerization shrinkage, better mechanical properties, easy execution, and as a consequence the decrease in clinical time. However, there is still no consensus in the literature regarding the effectiveness and durability of this material. The objective of this study was to carry out a bibliographic review on bulk-fill resins and their comparison with conventional resins. Scientific articles in Portuguese and English from 2002 to 2019 were searched in the databases Medical Publications (PUBMED) and Scientific Eletronic Library Online (SCIELO), with 50 papers selected for full reading based on the inclusion criteria: language in English or Portuguese and publications made in the last twenty years and exclusion criteria: articles that did not address the central theme of the study, publications in languages other than English or Portuguese, electronic articles not available for full reading and periodicals outside the established period. According to the researched bibliography, filling resins are an option of restorative material, which have been showing success similar to that found in rehabilitation with conventional composite resins.

scholarly journals A Novel Technique for Bulk-Fill Resin-Based Restorations: Achieving Function and Esthetics in Posterior Teeth

2017 ◽  
Vol 2017 ◽  
pp. 1-5
Author(s):  
Gerardo Durán Ojeda ◽  
Ismael Henríquez Gutiérrez ◽  
José Pablo Tisi ◽  
Abelardo Báez Rosales
Keyword(s):  
Mechanical Properties ◽  
Composite Resins ◽  
Shrinkage Stress ◽  
Posterior Teeth ◽  
Polymerization Shrinkage ◽  
Reflective Index ◽  
Novel Technique

Advances in the mechanical properties of composite resins have allowed for their use in posterior teeth. Conventional resins have several problems associated with polymerization shrinkage stress. The development of “bulk-fill” resins has allowed for their use in single increments up to depths of 4 mm, with very low polymerization shrinkage stress. Nevertheless, differences in anatomy and the desire for optimal esthetics present unique difficulties. This article describes a step-by-step technique using flowable bulk-fill resin as a substitute for dentin in a single increment, together with a high-reflective-index resin to restore enamel and decrease clinical time, obtaining anatomically and esthetically acceptable results without detriment to the mechanical properties required to restore the functionality of the posterior teeth.

scholarly journals The effect of resin shades on microhardness, polymerization shrinkage, and color change of dental composite resins

2009 ◽  
Vol 28 (4) ◽  
pp. 438-445 ◽  
Author(s):  
Tae-Sung JEONG ◽  
Ho-Seung KANG ◽  
Sung-Ki KIM ◽  
Shin KIM ◽  
Hyung-Il KIM ◽  
...  
Keyword(s):  
Color Change ◽  
Composite Resins ◽  
Dental Composite ◽  
Polymerization Shrinkage ◽  
Dental Composite Resins

scholarly journals Evaluation of Polymerization shrinkage of 2 types of posterior composite resins

2017 ◽  
Vol 07 (01) ◽  
pp. 025-028
Author(s):  
Lakshmi Nidhi Rao ◽  
Mithra N. Hegde ◽  
Aditya Shetty
Keyword(s):  
Clinical Outcome ◽  
T Test ◽  
Composite Resins ◽  
Restorative Material ◽  
Restorative Dentistry ◽  
Posterior Teeth ◽  
Polymerization Shrinkage ◽  
Glass Fibres ◽  
First Choice ◽  
Significant Difference

AbstractComposite resins represent a class of material widely used in restorative dentistry, not only for anterior aesthetics but also as the first choice to restore posterior teeth. However the key limitation in the use of composite resins as a restorative material is related to shrinkage during polymerization which leads to poor marginal seal, marginal staining, restoration displacement, tooth fracture and recurring caries [1].Polymerization shrinkage may affect negatively the clinical outcome of the restoration. Hence the present study evaluates the Polymerization shrinkage of 2 different posterior composites; Filtek Z350(3M) and everX Posterior(GC), using a pycnometer.Independent Sample T-Test was used to determine statistically significant difference in volumetric shrinkage among the tested composite resins. everX Posterior showed comparatively less shrinkage than Filtek Z350; which can be attributed to the presence of silanated e-glass fibres.

The Silorane-based Resin Composites: A Review

2017 ◽  
Vol 42 (1) ◽  
pp. E24-E34 ◽  
Author(s):  
GA Maghaireh ◽  
NA Taha ◽  
H Alzraikat
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Clinical Significance ◽  
Physical And Mechanical Properties ◽  
Marginal Adaptation ◽  
Resin Composites ◽  
Restorative Material ◽  
Polymerization Shrinkage ◽  
Tooth Structure

SUMMARY This article aims to review the research done on the silorane-based resin composites (SBRC) regarding polymerization shrinkage and contraction stresses and their ability to improve the shortcomings of the methacrylate-based resin composites (MRBC). Special attention is given to their physical and mechanical properties, bond strength, marginal adaptation, and cusp deflection. The clinical significance of this material is critically appraised with a focus on the ability of SBRC to strengthen the tooth structure as a direct restorative material. A search of English peer-reviewed dental literature (2003-2015) from PubMed and MEDLINE databases was conducted with the terms “low shrinkage” and “silorane composites.” The list was screened, and 70 articles that were relevant to the objectives of this work were included.

scholarly journals THE COMPARISON OF RESIN-BASED COMPOSITES PHYSICAL PROPERTIES BETWEEN BULK-FILL TECHNIQUE AND INCREMENTAL TECHNIQUE

2021 ◽  
Vol 6 (1) ◽  
pp. 85
Author(s):  
Rahmi Khairani Aulia
Keyword(s):  
Physical Properties ◽  
Composite Resin ◽  
Color Stability ◽  
Composite Resins ◽  
Shrinkage Stress ◽  
Restorative Material ◽  
Polymerization Shrinkage ◽  
Advantages And Disadvantages ◽  
Restoration Technique ◽  
Restoration Failure

ABSTRACT:Composite resins are currently the most popular restorative material in dentistry. This is due to good aesthetics and maximum conservation ability. Behind these advantages, there are disbenefits of composite resin materials, such as polymerization shrinkage, which can lead to restoration failure. Various attempts have been investigated to reduce the shrinkage incidence of composite resins, one of which is the technique of placing the restorative material into the cavity. The restoration filling technique is recognized as a significant factor in shrinkage stress. By using a special filling technique, the polymerization shrinkage damage stress can be reduced. There are several techniques in performing composite resin fillings, including bulk and incremental techniques. These techniques have their respective advantages and disadvantages. The aim of this literature review was to compare the physical properties of composite resin restorations with bulk filling and incremental techniques. Physical properties that being studied include polymerization shrinkage, stress shrinkage, degree of conversion, bonding strength, water resorption, color stability, and temperature increase. Comparing the two techniques, composite resin with incremental filling technique has superior physical properties compared to bulk technique. From the comparison of the two techniques, the composite resin with incremental filling technique has superior physical properties compared to the bulk technique, especially in higher conversion which causes lower shrinkage stress. This situation makes the incremental technique provide better bond strength, water resorption, color stability, and lower temperature rise.Keywords: Bulk, Composite Resin, Incremental,  Physical Properties, Restoration, Restoration Technique

scholarly journals Deterioration of Mechanical Properties of Composite Resins

1995 ◽  
Vol 14 (1) ◽  
pp. 78-83,104 ◽  
Author(s):  
Hiroyuki ARIKAWA ◽  
Hiroyuki KUWAHATA ◽  
Hideo SEKI ◽  
Takahito KANIE ◽  
Koichi FUJII ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Resins

Influence of the Method of Polymerization of Composite Material for Teeth Crown Fillings on its Strength Properties

2015 ◽  
Vol 240 ◽  
pp. 168-173
Author(s):  
Grzegorz Milewski ◽  
Tomasz Majewski
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Composite Material ◽  
Modulus Of Elasticity ◽  
Strength Properties ◽  
Dental Practice ◽  
Polymerization Shrinkage ◽  
Filling Materials

Polymerization shrinkage of composite filling materials still becomes one of the most important features which decreases strength properties of reconstructed teeth crowns. From among various methods to reduce that disadvantageous phenomenon which are used in a dental practice sandwich filling processing of crown cavity seems to be the most effective one. The paper presents the results of the strength examination of the influence of the different ways of layered polymerization processing on the mechanical properties of modern hybrid micro composite material with regards to the following quantities: compressive strength, strain to fracture, modulus of elasticity and work to fracture.

Physical–mechanical evaluation of a microhybrid and a nanofilled composite light activated by quartz-halogen tungsten and light-emitting diode

2018 ◽  
Vol 53 (7) ◽  
pp. 981-990
Author(s):  
Fernanda P Ritto ◽  
Eduardo Moreira da Silva ◽  
Hélio Rodrigues Sampaio-Filho ◽  
Raimundo A Lacerda ◽  
Márcio AP Borges ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Nuclear Magnetic Resonance ◽  
Light Emitting Diode ◽  
Degree Of Conversion ◽  
Dental Composite ◽  
Polymerization Shrinkage ◽  
Light Emitting ◽  
Scanning Electron

The aim of this study was to characterize organic and disperse phase of a microhybrid (Mh – Filtek Z250) and a nanofilled (Nf – Filtek Z350) dental composite and analyze the influence of two LCUs (QHT-quartz-halogen tungsten and LED – light-emitting diode) on its physical–mechanical properties (degree of conversion, polymerization shrinkage, Vickers hardness and diametral tensile strength). Surface morphology was studied by scanning electron microscopy. The disperse phase content was measured using thermogravimetric analysis (TGA) and the organic fractions were qualitatively analyzed by nuclear magnetic resonance spectroscopy. Physical–mechanical properties were analyzed varying dental composite and LCU: Mh-QHT, Nf-QHT, Mh-LED and Nf-LED. The degree of conversion was evaluated using Raman spectrophotometry and polymerization shrinkage was measured by water picnometry. Mechanical behavior was analyzed by Vickers microhardness and diametral tensile testing. Scanning electron microscopy analysis showed similar microstructure of the materials mainly composed with different-sized particles dispersed within methacrylate matrix. Thermogravimetric analysis shows 80.13% of inorganic fraction for microhybrid composite and 75.29% for nanofilled. Nuclear magnetic resonance analysis showed similar organic structure for composites and did not show the presence of the monomer TEGDMA. Different light sources did not influence the tested properties, but considering different composites, nanofilled showed the highest degree of conversion (Gr 2:77%, Gr 4: 79.4%). The study shows that when the optimum radiant exposure (24 J/cm2) was used for polymerization of composites, regardless of the polymerization source, the properties of these resin materials showed satisfactory and similar results in relation to the conversion of polymers, polymerization shrinkage and mechanical behavior.

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