A5079203263- Dental materials and restorations
- Dental Erosion and Treatment
- Endodontics and Root Canal Treatments
- Dental Implant Techniques and Outcomes
- Dental Research and COVID-19
- Orthodontics and Dentofacial Orthopedics
- Electrospun Nanofibers in Biomedical Applications
- Geophysical and Geoelectrical Methods
- Geophysical Methods and Applications
- Pigment Synthesis and Properties
- Dental Radiography and Imaging
- Dental Health and Care Utilization
- Oral microbiology and periodontitis research
- Minerals Flotation and Separation Techniques
- Temporomandibular Joint Disorders
- Material Properties and Processing
- Textile materials and evaluations
- Concrete and Cement Materials Research
- Advanced Cellulose Research Studies
- biodegradable polymer synthesis and properties
- Geological and Geophysical Studies
- Underwater Acoustics Research
- Digital Imaging in Medicine
- Gender, Sexuality, and Education
- Innovative concrete reinforcement materials
Universidade Estadual de Campinas (UNICAMP)
2002-2023
Universidade Estadual do Centro-Oeste
2018
University of British Columbia
2013-2018
Florida College
2011
University of Florida
2011
Fundação Faculdade de Odontologia
2001-2011
St. Vincent's Birmingham
2011
University of Alabama at Birmingham
2011
Universidade de São Paulo
1999-2010
University of Iowa
2007
Incompletely infiltrated collagen fibrils in acid-etched dentin are susceptible to degradation. We hypothesize that degradation can occur the absence of bacteria. Partially demineralized matrices (DCMs) prepared from human were stored artificial saliva. Control specimens saliva containing proteolytic enzyme inhibitors, or pure mineral oil. retrieved them at 24 hrs, 90 and 250 days examine extent DCM. In 24-hour experimental 90- 250-day control specimens, we observed 5- 6-μm-thick layers DCM...
Host-derived proteases have been reported to degrade the collagen matrix of incompletely-resin-infiltrated dentin. This study tested hypothesis that interfacial degradation resin-dentin bonds may be prevented or delayed by application chlorhexidine (CHX), a metalloproteinase inhibitor, dentin after phosphoric acid-etching. Contralateral pairs resin-bonded Class I restorations in non-carious third molars were kept under intra-oral function for 14 months. Preservation was assessed microtensile...
Loss of hybrid layer integrity compromises resin-dentin bond stability. Matrix metalloproteinases (MMPs) may be partially responsible for degradation. Since chlorhexidine inhibits MMPs, we hypothesized that would decelerate the loss bonds. Class I preparations in extracted third molars were sectioned into two halves. One half was customarily restored (etch-and-rinse adhesive/resin composite), and other treated with 2% after being acid-etched before restoration. Specimens stored artificial...
The mechanism responsible for hydrogenperoxide- or sodium-hypochlorite-induced reductions in dentin bond strength is unknown. This vitro study tested the hypothesis that these oxidizing agents were by attempting to reverse effect with sodium ascorbate, a reducing agent. Human was treated oxidants before after being acid-etched and without post-treatment ascorbate. They bonded either Single Bond Excite. Hydrogen peroxide reduced strengths of both adhesives, while hypochlorite produced...
During the development of microtensile bond-testing method, large variations in bond strengths were noted among serial sections. The reason for these is unknown. purpose this work was to determine consistency resin-dentin across occlusal surface coronal dentin by dividing composite resin buildups into an array 1 x mm beams, top half consisting resin, and bottom dentin. Extracted human third molars had enamel removed as a single section means diamond saw. Resin made after bonded with either...
Oxygen inhibits polymerization of resin-based materials. We hypothesized that compromised bonding to bleached enamel can be reversed with sodium ascorbate, an anti-oxidant. Sandblasted human specimens were treated distilled water (control) and 10% carbamide peroxide gel or without further treatment ascorbate. They bonded Single Bond (3M-ESPE) Prime&Bond NT (Dentsply DeTrey) restored a composite. Specimens prepared for microtensile bond testing transmission electron microscopy after immersion...
Carious dentin is partially demineralized and contains mineral crystals in the tubules. This may permit deeper etching of intertubular but prevent resin tag formation during bonding. We hypothesize that adhesives will produce lower bond strengths to caries-infected caries-affected compared with normal dentin. tested this by measuring microtensile strength a total-etch adhesive an experimental self-etching (ABF) caries-infected, caries-affected, sound correlating those results ultrastructural...
The regional bond strengths of three current-generation bonding systems (All Bond 2, Scotchbond MultiPurpose, and Clearfil Liner 2) were measured in natural wedge-shaped defects the cervical area extracted human teeth. A microtensile testing method was used to compare resin bonds made occlusal margins with those gingival margins. Controls consisted normal teeth which had artificial defects, same depth dimension, created a high-speed bur. results indicated that there no differences strength,...
During resin-bonding procedures, dentin surfaces are treated with acidic conditioners to remove the smear layer and decalcify surface expose collagen fibrils of underlying matrix. These decalcified then either air-dried or dehydrating solvents, procedures which may modify physical properties The purpose this study was evaluate effects dehydration on stiffness Small (8 x 1.7 0.9 mm) beams were prepared from mid-coronal extracted human molars. ends covered varnish for protection, specimens...
Re-expansion of dried demineralized dentin is required to optimize resin adhesion. This study tested the hypothesis that bond strengths depend upon ability experimental HEMA(2-hydroxy-ethyl-methacrylate)/solvent primers re-expand matrix. Dentin surfaces were acid-etched with 37% phosphoric acid for 20 sec, air-dried 30 primed either 35/65% (v/v) HEMA/water, HEMA/methanol, HEMA/ethanol, or HEMA/propanol 60 and bonded 4-META-TBBO(4-methacryloyloxyethyl trimellitate anhydride-tri- n-butyl...
The purpose of this study was to test the null hypothesis that re-expansion dried matrix and shrinkage moist, demineralized dentin is not influenced by polar solvents. Dentin disks were prepared from midcoronal extracted human third molars. After complete demineralization in 0.5M EDTA (pH 7), specimens placed well a device measures changes height real time. Dry, collapsed matrices created blowing dry N(2) on until they shrank stable plateau. Polar solvents [water, methanol, ethanol,...
Clinical Relevance Dentists' use of specific diagnostic methods vary substantially. Overall, the dental explorer and radiographs are still main to diagnose caries.
The mechanical removal of dentinal caries traditionally involves the use tactile sensation and/or caries-indicating dyes. This study tested hypothesis that self-limiting polymer burs are as effective conventional carbide in creating substrates for dentin bonding. Carious from extracted human molars was removed with or burs, dental explorer hardness end-point removal. Dentin were bonded etch-and-rinse self-etch adhesives and prepared microtensile bond testing transmission electron microscopy....