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8. Consensus on glass-ionomer cement thresholds for restorative indications

Author

de Lima Navarro, Maria Fidela, Pascotto, Renata Corrêa, Borges, Ana Flávia Sanches, Soares, Carlos José, Raggio, Daniela Prócida, Rios, Daniela, Bresciani, Eduardo, Molina, Gustavo Fabián, Ngo, Hien Chi, Miletić, Ivana, Frencken, Jo, Wang, Linda, Menezes-Silva, Rafael, Puppin-Rontani, Regina Maria, de Carvalho, Ricardo Marins, Gurgan, Sevil, Leal, Soraya Coelho, Tüzüner, Tamer, Fagundes, Ticiane Cestari, Nicholson, John William, and Sidhu, Sharanbir Kaur

Published
2021
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45. Polymerization Shrinkage Stresses in a Premolar Restored with Different Composite Resins and Different Incremental Techniques.

Author

Soares, Carlos Jose, Bicalho, Aline Aredes, Tantbirojn, Daranee, and Versluis, Antheunis

Subjects
POLYMERIZATION, BICUSPIDS, ELASTIC modulus, KNOOP hardness, RESIDUAL stresses, DENTAL resins, REGRESSION analysis, STATISTICAL correlation
Abstract

Purpose: To investigate how the incremental filling technique, elastic modulus, and post-gel shrinkage of different dental composite resins affect residual shrinkage stress in a restored premolar. Materials and Methods: Sixteen composites indicated for restoring posterior teeth were tested. Elastic modulus and Knoop hardness were measured using Knoop indentation tests (n = 10). A strain gauge test was used to measure the post-gel shrinkage (n = 10). Two incremental techniques, horizontal or oblique, were applied in a finite element model of a premolar in combination with the experimentally determined properties to assess the stress conditions along the interface of the restoration and within the material structures. Linear regressions were determined between residual shrinkage stress and the elastic modulus and post-gel shrinkage values. Results: The mechanical properties and the post-gel shrinkage varied significantly among the composites tested. The calculated shrinkage stress showed a strong correlation with post-gel shrinkage and a weaker correlation with elastic modulus. The oblique incremental filling technique resulted in lower residual shrinkage stress in the enamel and dentin and along the enamel/composite interface compared to the horizontal technique. Conclusion: Residual stress varied significantly among the contemporary dental composites indicated for restoring posterior teeth. Shrinkage stress in a restored tooth correlated with post-gel shrinkage. In general, oblique incremental filling resulted in lower residual stresses than did horizontal increments. [ABSTRACT FROM AUTHOR]

Published
2013
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46. Influence of Er,Cr:YSGG laser on dentin acid resistance after erosive challenge.

Author

RESENDE, RANIELLE FERNANDES, ARANTES, BRENDA FERREIRA, DIBB, REGINA GUENKA PALMA, FARAONI, JULIANA JENDIROBA, DE CASTRO, DENISE TORNAVOI, DE MENEZES OLIVEIRA, MARIA ANGELICA HUEB, SOARES, CARLOS JOSE, GERALDO-MARTINS, VINICIUS RANGEL, and LEPRI, CESAR PENAZZO

Subjects
FLUORIDE varnishes, DENTIN, LASERS, KRUSKAL-Wallis Test, SURFACE roughness, COOLING of water
Abstract

Purpose: To evaluate the influence of the Er,Cr:YSGG laser with or without the 5% fluoride varnish on the acid resistance of dentin after erosive challenge. Methods: 36 incisors were selected and sectioned, obtaining 72 specimens of 4 mm x 4 mm and randomly divided into eight groups (n = 9). In Gl: application of Er,Cr:YSGG (0.1 W; 5Hz, air 55%); G2: laser (0.25W; 5Hz, air 55%); G3: fluoride varnish + laser (0.1W; 5Hz, air 55%); G4: fluoride varnish + laser (0.25W, 5Hz, air 55%); G5: fluoride varnish + laser (0.1W; 5Hz, without air); G6: fluoride varnish + laser (0.25W, 5Hz, without air); G7: fluoride varnish and G8: no treatment. When used, the laser was irradiated without water cooling, scanning mode during 10 seconds. The surface roughness data were subjected to ANOVA. For wear profile, we used Kruskal-Wallis test and Dunn post-hoc, all with a= 0.05. Results: The results showed no statistically significant difference when comparing the groups as regards to the surface roughness (P> 0.05). Regarding the percentage of lost volume, the G5 and G6 groups presented the best results (G5 = 7.8% and G6 = 8.5%), with the lowest loss of dentin volume compared to other groups (P< 0.05). The G8 group (no treatment) had the highest lost volume (G8 = 39.1% followed by the G7 group (fluoride varnish), which had 25.9%. (Am JDent 2019;32:215-218). [ABSTRACT FROM AUTHOR]

Published
2019

50. Conservative treatment for amelogenesis imperfecta: A case report

Author

Campos, Roberto Elias, Valdivia, Andrea Dolores Correia Miranda, De Freitas Santos-Filho, Paulo Cesar, De Souza Menezes, Murilo, De Oliveira, Osmir Batista [UNESP], Soares, Carlos Jose, Universidade Federal de Uberlândia (UFU), Operative Dentistry and Dental Materials Department, and Universidade Estadual Paulista (UNESP)

Abstract

Made available in DSpace on 2022-04-28T19:00:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-01 Amelogenesis imperfecta is a hereditary condition that can alter the thickness, color, and shape of tooth enamel. Recent adhesive materials and techniques have provided less invasive treatment options. This case report presents the treatment of a patient whose anterior teeth had color alterations, white spots, pits, and shape defects. Using a more conservative technique, the mandibular and maxillary anterior teeth were restored using veneer direct composite restorations. After 6 years, the restorations demonstrated no deterioration, and no pathology was seen in association with the rehabilitation. Department of Restorative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlandia Operative Dentistry and Dental Materials Department Operative Dentistry Department, Araraquara School of Dentistry, Sao Paulo State University Operative Dentistry Department, Araraquara School of Dentistry, Sao Paulo State University

Published
2014

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