Evaluation of the physical properties of dental resin composites using optical fiber sensing technology

Rajan, Ginu; Shouha, Paul; Ellakwa, Ayman; Bhowmik, Kishore; Xi, Jiangtao; Prusty, B. Gangadhara

doi:10.1016/j.dental.2016.06.015

Cited by 28 publications

(28 citation statements)

References 24 publications

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“…The microslits on the zirconia disks were fabricated in a simple reticular pattern because the purpose was to examine the SBS with or without microslits. In general, since resins exhibit a relatively high level of water absorption, and their coefficient of thermal expansion (CTE) is higher than that of zirconia 21) , a reduction in adhesion strength might be expected as a result of long-term exposure to moisture and significant temperature changes in the oral cavity. Therefore, the change in the SBS before and after thermal cycling was examined for indirect composite resin and acrylic resin.…”

Section: Discussionmentioning

confidence: 99%

Effect of microslit retention on the bond strength of zirconia to dental materials

et al. 2019

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The aim of this study was to investigate the effect of microslits formed by Nd:YVO4 laser beam machining on the bond strength between two types of zirconia, yttria-partially stabilized zirconia (Y-TZP) and ceria-partially stabilized zirconia/alumina nanocomposite (Ce-TZP/A), and porcelain or two types of resin. Zirconia disks were divided into three groups: 1) non-treated (NT); 2) blasted with alumina particles (AB); 3) microslits fabricated on a zirconia surface by laser beam machining (MS). After veneering porcelain or resins on zirconia specimens, halves of the resin specimens were thermocycled up to 20,000 cycles. The shear bond strength between porcelain and both types of zirconia was not improved by the microslits. Before and after thermocycling, the bond strength between an indirect composite resin or acrylic resin and Y-TZP with microslits was the highest. It was concluded that the microslits on Y-TZP enabled micromechanical interlocking and improved the bond strength and durability of the resins.

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Section: Discussionmentioning

confidence: 99%

Effect of microslit retention on the bond strength of zirconia to dental materials

et al. 2019

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“…Polymerisation process involves certain amount of polymerisation shrinkage (PS), which could be due to chemical, thermal or post contraction 9 . During chemical contraction, the van der Waals distance between the atoms of monomers are reduced from to ~10 4 Å ~1.0 Å, resulting in bulk contraction in cured resin, i.e., volumetric polymerisation shrinkage 10–12 . Though the effect of thermal contraction due to exothermic reaction and cooling back to room temperature is minimal, internal stresses could be induced which could be detrimental to the restoration 9 .…”

Section: Introductionmentioning

confidence: 99%

“…Assuming the dental resin is macroscopically isotropic, shrinkage is also assumed to be equal in all directions, i.e., volumetric shrinkage is assumed to be thrice of linear shrinkage 31 . Linear shrinkage of dental resins could be measured using dilatometer 32 , bonded disc based Watts method 32 , strain gauges 33 , scanning laser beam method 34 , video imaging technique 35 , linear displacement and force 36 and by using fibre optic sensors 12,37,38 .…”

Section: Introductionmentioning

confidence: 99%

“…Among the various types of fibre optic sensors available, fibre Bragg grating (FBG) is preferred sensor for composites 46 due to ease of embedding the sensor within the composite. Polymerisation shrinkage, water sorption, thermal expansion and setting expansion, are successfully measured in the past 12,37,38,47 . In this paper, PS profile mapping of the composite using an FBG array, correlation between DOC, rate of cure and linear PS in real-time during photo-polymerisation process of a commercial dental composite using optical fibre sensing method is investigated…”

Section: Introductionmentioning

confidence: 99%

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Polymerisation Shrinkage Profiling of Dental Composites using Optical Fibre Sensing and their Correlation with Degree of Conversion and Curing Rate

Rajan

Raju

Jinachandran

et al. 2019

Sci Rep

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Traditional polymerisation shrinkage (PS) measurement systems measure average PS of dental composites, but the true local PS varies along the length and breadth of the composite. The PS depends on the curing light intensity distribution, resultant degree of conversion (DOC) and the curing rate. In this paper, optical fibre Bragg grating (FBG) sensing based technology is used to measure the linear post-gel PS at multiple locations within dental composite specimens, and is correlated with DOC and curing rate. A commercial dental composite is used, and its post-gel PS and DOC are mapped using embedded fibre Bragg grating sensors at different curing conditions. The distance between the curing lamp and the composite specimen is varied which resulted in different intensity distribution across the specimen. The effect of curing light intensity distribution on PS, curing rate and DOC are investigated for demonstrating a relationship among them. It is demonstrated that FBG sensing method is an effective method to accurately profiling post-gel PS across the specimen.

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“…The finite element modeling and finite element modal analysis are carried out for the original design of the structure. Rajan, G. et al [3] used optical fiber sensing technology to evaluate the physical properties of dental resin composites. The modal and frequency of the structure are predicted as the dynamic information under the undamaged state of the structure.…”

Section: State Of the Artmentioning

confidence: 99%

Distributed Fiber Optical Technology for Damage Identification of Engineering Structure

Dong¹,

Zhou²

2018

Int. J. Onl. Eng.

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Abstract-To conduct optical fiber monitoring rock slide model test and optical fiber monitoring of steel concrete interface slip model test, the large triaxial shear test of geotechnical engineering was used. First, the data of sliding distance and optical loss and their dynamic range were obtained. Second, the slide distance and fiber loss relation curve and the fitting equation were worked out. Finally, the typical applications of optical fiber sensing technology in Rock Engineering (high slope engineering, rock foundation of Dam Engineering) slope stability and geological disaster monitoring were put forward. The results showed that optical fiber sensing was very sensitive, and the loss value was 30 to 50dB. The dynamic range of rock slide monitoring fiber was 3 to 3.5mm, and the dynamic range of the interface slip monitoring fiber was 1.6mm. Thus, the sensing system can detect the sliding process of the interface between the concrete and the steel plate. It provides some reference for the sliding monitoring of the composite materials.

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Evaluation of the physical properties of dental resin composites using optical fiber sensing technology

Cited by 28 publications

References 24 publications

Effect of microslit retention on the bond strength of zirconia to dental materials

Effect of microslit retention on the bond strength of zirconia to dental materials

Polymerisation Shrinkage Profiling of Dental Composites using Optical Fibre Sensing and their Correlation with Degree of Conversion and Curing Rate

Distributed Fiber Optical Technology for Damage Identification of Engineering Structure

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