Polymer composites for dental fillings

Rangreez, Tauseef Ahmad; Mobin, Rizwana

doi:10.1016/b978-0-12-813742-0.00013-4

Cited by 14 publications

(10 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous studies are focused nowadays on the development of novel adhesive materials [48]. Issues addressed include their cytotoxicity [49], strengthening the tooth/composite resin bond [50][51][52][53], and increasing adhesives' stability [54] and durability [55], as well as improving their performances by adding nanoparticles in their composition [52,[56][57][58]. The latter direction of research has been the scope of this work as well.…”

Section: Development Of the Novel Adhesive Materialsmentioning

confidence: 99%

Dental Adhesive Interfaces Reinforced with Magnetic Nanoparticles: Evaluation and Modeling with Micro-CT versus Optical Microscopy

et al. 2020

View full text Add to dashboard Cite

Dental adhesives are used in a wide range of applications, including to place direct composite restorations in frontal or posterior teeth. One of the most frequent causes for the failure of composite resin restorations is microleakages. The first aim of this work is to introduce a new type of self-etched dental adhesive doped with magnetic nanoparticles (MPs) synthetized in the laboratory. The scope is to produce adhesives with a minimized width/thickness to decrease the risk of microleakages. The second aim is to assess the width/thickness of the adhesive layer in all the characteristic areas of the teeth using both the less precise but most common optical microscopy and the more accurate and volumetric micro-Computed Tomography (CT) investigations. Twenty extracted teeth have been divided into four groups: Group 1 includes ‘blank’ samples with adhesives that are not doped with MPs; Group 2 includes samples with adhesives doped with MPs; Groups 3 and 4 include samples with adhesives doped with MPs that are subjected to an active magnetic field for 5 and 10 min, respectively. Microscopy investigations followed by micro-CT and EDAX are performed on the adhesive. While a rather good agreement is obtained between the microscopy and micro-CT results, the capability of the latter to offer a full volumetric reconstruction of the layer is exploited to analyze the adhesion of the four considered dental materials. Thus, from micro-CT results the graphs of the surface areas as functions of the adhesive layer width are modeled mathematically, as well as the volume of sealants, for each of the four groups. To our knowledge, it is the first time that such a methodology is used. Characteristic parameters are extracted and the ascertainment of the optimal parameter that should be utilized for such assessments is discussed. The study demonstrates the adhesion improvement produced for Groups 3 and 4, where MPs are used. It also concludes that the magnetic field should be applied to the adhesive material for the longest possible exposure time (with a trade-off with the clinical duration of the treatment).

show abstract

Section: Development Of the Novel Adhesive Materialsmentioning

confidence: 99%

Dental Adhesive Interfaces Reinforced with Magnetic Nanoparticles: Evaluation and Modeling with Micro-CT versus Optical Microscopy

et al. 2020

View full text Add to dashboard Cite

show abstract

“… 34 36 A higher filler loading results in a higher post-curing surface hardness, as rigid inorganic particles provide a strong interfacial bond between the filler particles and resin matrix, which directly contributes to higher hardness. 37 38 Apart from filler content, the filler size also plays a role in the surface hardness of cement. 30 …”

Section: Discussionmentioning

confidence: 99%

Microhardness of resin cements after light activation through various translucencies of monolithic zirconia

Pechteewang

Salimee

2021

J Adv Prosthodont

View full text Add to dashboard Cite

PURPOSE This study aimed to investigate the Vickers Hardness Number (VHN) of light- and dual cured resin cements cured through monolithic zirconia specimens (VITA YZ) of various translucencies: translucent (T); high translucent (HT); super translucent (ST); and extra translucent (XT) at 0, 24, and 48 h after curing. MATERIALS AND METHODS Four zirconia specimens from each translucency were prepared. Two light-cured resin cements (Variolink N LC; VL and RelyX Veneer; RL) and two dual-cured resin cements (Variolink N DC; VD and RelyX U200; RD) were used. The cement was mixed and loaded in a mold and cured for 20 s through the zirconia specimen. The upper surface of cements was tested for VHN using a microhardness tester at 0, 24, and 48 h after curing. The VHN were analyzed using two-way repeated, Brown-Forsythe ANOVA with Games Howell post-hoc analysis and independent t-tests ( P < .05). RESULTS All cements showed significantly higher VHN from 0 h to 24 h ( P < .001). At 48 h, the VHN of light-cured cements were significantly lower when cured under the T groups than under XT groups ( P = .001 in VL, P = .014 in RL). At each post curing time of each translucency, VD showed higher VHN than VL ( P < .05), and RD also showed higher VHN than RL ( P < .05). CONCLUSION The translucency of zirconia has an effect on the VHN for light-cured resin cements, but has no effect on dual-cured resin cements. Dual-cured resin cement exhibited higher VHN than the light-cured resin cement from the same manufacturer. All resin cements showed significantly higher VHN from 0 h to 24 h.

show abstract

“…PPP has hydrophilic nature and contains many hydroxyl groups mainly from phenolic compounds [20]. Incorporation of PPP into PVA matrix had affected the neatness of molecular organization of PVA [21]. The increasing content of PPP in PVA matrix had directly contributed to the high number of hydroxyl groups from phenolic compounds which formed new hydrogen bonding with the PVA hydroxyl group.…”

Section: Water Contact Anglementioning

confidence: 99%

Synthesis and characterization of water-soluble polyvinyl alcohol/pomegranate peel powder films

2020

Biointerface Res Appl Chem

View full text Add to dashboard Cite

Biodegradable plastics had gained much attention among the researchers due to the arising of sustainability and environmental issues caused by petrochemical-based plastics. In this study, PVA films incorporated with pomegranate peel powder (PPP) were synthesized by using solution casting method. The effect of PPP on the surface morphology, physical properties, barrier properties and antibacterial activity of PVA based films were studied through FE-SEM, water solubility test, water contact angle test and Kirby-Bauer test. The incorporation of PPP had significantly enhanced the water solubility and surface energy of PVA-PPP films with the increasing of PPP content that caused reduction in water contact angle of the films. However, the films do not show a significant effect on the antibacterial efficacy against E.coli. In conclusion, PVA-PPP films have great potential to be used as green packaging materials for cosmetics products provided that further study on antibacterial efficacy against gram positive bacteria should be conducted.

show abstract

Polymer composites for dental fillings

Cited by 14 publications

References 68 publications

Dental Adhesive Interfaces Reinforced with Magnetic Nanoparticles: Evaluation and Modeling with Micro-CT versus Optical Microscopy

Dental Adhesive Interfaces Reinforced with Magnetic Nanoparticles: Evaluation and Modeling with Micro-CT versus Optical Microscopy

Microhardness of resin cements after light activation through various translucencies of monolithic zirconia

Synthesis and characterization of water-soluble polyvinyl alcohol/pomegranate peel powder films

Contact Info

Product

Resources

About