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Adriano Fonseca Lima

Bio: Adriano Fonseca Lima is an academic researcher from State University of Campinas. The author has contributed to research in topics: Bond strength & Enamel paint. The author has an hindex of 17, co-authored 54 publications receiving 728 citations.


Papers
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Journal ArticleDOI
TL;DR: Only air abrasion associated with a self-etching system provided repair bond strength comparable to composite UTS when repair procedure was performed 24 hours after composite polymerization.
Abstract: Statement of the Problem: An adequate repair procedure depends on high bond strength between the existing composite and the new composite. Purpose: To evaluate the effect of surface treatments and bonding procedures on the bond strength of repairs performed 24 hours after composite polymerization. Materials and Methods: Composite specimens were stored in distilled water at 37°C for 24 hours. Specimens were allocated into 12 groups (N=10) according to the combination of surface treatment (none, air abrasion, diamond bur) and bonding procedure (none, Single Bond after H3PO4 cleansing, Clearfil SE Bond after H3PO4 cleansing, Clearfil SE Bond without H3PO4 cleansing). The ultimate tensile strength (UTS) of the composite was tested in nonrepaired specimens. Twenty-four hours after repair, specimens were sectioned into three slabs and trimmed to an hourglass shape (1 mm2 area). Slabs were tested under tension and mean bond strengths analyzed with two-way analysis of variance/Tukey and Dunnett tests (α=5%). Results: Two groups resulted in repair bond strengths similar to composite UTS: air abrasion combined with Clearfil SE Bond after H3PO4 cleansing, and air abrasion combined with Clearfil SE Bond without H3PO4 cleansing. Combinations of surface treatments and bonding procedures were not statistically different. Conclusions: When repair procedure was performed 24 hours after composite polymerization, different combinations of surface treatments and bonding procedures affected repair bond strength similarly. There was no statistical difference between the repair bond strength of groups air-abraded and bonded with the self-etching system and composite UTS. CLINICAL SIGNIFICANCE Only air abrasion associated with a self-etching system provided repair bond strength comparable to composite UTS.

93 citations

Journal ArticleDOI
TL;DR: It could be concluded that the DC and E values can be influenced by the light source; however, this interference is material dependent.
Abstract: The aim of the present study was to evaluate the degree of conversion (DC), elastic modulus ( E ), and flexural strength (FS) of five adhesive systems (only the bonding component of both Scotchbond MP-SBMP and Clearfil Protect Bond-CP; Single Bond 2-SB2; One-up Bond F Plus-OUP; and P90 System Adhesive: primer-P90P and bond-P90B) cured with a quartz tungsten halogen (QTH) lamp and a light-emitting diode (LED). Two groups per adhesive were formed ( n = 5 ), according to the light source (quartz tungsten halogen–QTH: Demetron LC; and light-emitting diode–LED: UltraLume 5). Bar-shaped specimens were evaluated using three-point bending. The DC was obtained by Fourier transform infrared spectroscopy (FTIR). SB2 and P90P exhibited better DC values for QTH curing. However, SB2 and P90P presented the worst results overall. The light source was statistically significant for all adhesives, except for P90B and OUP. Non-solvated adhesives presented the best E and FS values. It could be concluded that the DC and E values can be influenced by the light source; however, this interference is material dependent.

49 citations

Journal ArticleDOI
TL;DR: The combination bonding agent vs curing unit had a significant effect on DC, mainly for the self-etch adhesives.
Abstract: Clinical Relevance The effect of QTH and LED curing lights on the degree of conversion of bonding agents is material dependent.

49 citations

Journal ArticleDOI
TL;DR: The aim of this article is to review the current state-of-the-art of dental adhesives, and their chemical composition and characteristics that influences the polymerisation reaction and subsequent materials properties and performance.
Abstract: The chemistry of resin-based dental adhesives is critical for its interaction with dental tissues and long-term bonding stability. Changes in dental adhesives composition influences the materials' key physical-chemical properties, such as rate and degree of conversion, water sorption, solubility, flexural strength and modulus, and cohesive strength and improves the biocompatibility to dental tissues. Maintaining a suitable reactivity between photoinitiators and monomers is important for optimal properties of adhesive systems, in order to enable adequate polymerisation and improved chemical, physical and biological properties. The aim of this article is to review the current state-of-the-art of dental adhesives, and their chemical composition and characteristics that influences the polymerisation reaction and subsequent materials properties and performance.

48 citations

Journal ArticleDOI
TL;DR: The 16% CP cause a significant decrease in MDPC-23 cell viability and 10% SA was able to partially prevent the toxic effects of CP, which reduced the cytotoxic effects of these products on cells.
Abstract: Objectives The objectives of this study were to evaluate the transdentinal cytotoxicity of 10% and 16% carbamide peroxide gel (CP), as well as the ability of the antioxidant, 10% sodium ascorbate (SA), to protect the odontoblasts in culture. Study design Human dentin discs of 0.5-mm thickness were obtained and were placed into artificial pulp chambers. MDPC-23 odontoblastlike cells were seeded on pulp surface of the discs and the following groups were established: G1-No Treatment (control), G2-10% SA/6hs, G3-10%/CP6hs, G4-10%SA/6hs+10%CP/6hs, G5-16%CP/6hs, and G6-10%SA/6hs+16%CP/6hs. The cell viability was measured by the MTT assay. Results In groups where 16% CP was used, decreased cell viability was observed. Conversely, the application of 10% SA on the dentin discs, before the use of the CP, reduced the cytotoxic effects of these products on cells. Conclusions The 16% CP cause a significant decrease in MDPC-23 cell viability and 10% SA was able to partially prevent the toxic effects of CP.

40 citations


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01 Jan 2007
TL;DR: The terms "antioxidant", "oxidative stress" and "oxoidative damage" are widely used but rarely defined as discussed by the authors, and a brief review attempts to define them and to examine the ways in which oxidative stress and oxidative damage can affect cell behaviour both in vivo and in cell culture, using cancer as an example.
Abstract: The terms 'antioxidant', 'oxidative stress' and 'oxidative damage' are widely used but rarely defined. This brief review attempts to define them and to examine the ways in which oxidative stress and oxidative damage can affect cell behaviour both in vivo and in cell culture, using cancer as an example.

1,309 citations

Journal ArticleDOI
TL;DR: Repair of restoration is a valuable method to improve the quality of restorations and is accepted, practiced and taught in many universities, however, there is a need for methodologically sound randomized controlled long-term clinical trials to be able to give an evidence based recommendation.

200 citations

Journal ArticleDOI
TL;DR: There is moderate evidence that microleakage tests with dye penetration does not correlate with any of the clinical parameters (post-operative hypersensitivity, retention, marginal staining) and a rationale which helps the researcher to select and apply clinically relevant test methods in the laboratory is presented.

184 citations

Journal ArticleDOI
TL;DR: The experimental protocols tested provided significant tooth-bleaching improvement associated with decreased toxicity to pulp cells, which may be an interesting alternative to be tested in clinical situations intended to reduce tooth sensitivity and pulp damage.

140 citations

Journal ArticleDOI
TL;DR: None of the surface treatments can be recommended as a universally applicable repair technique for the different sorts of composites.

129 citations