Publications by authors named "Roberto Zimmer"
Objectives: To investigate the prevalence and factors associated with dentin hypersensitivity (DH) and non-carious cervical lesions (NCCLs).
Methods: The analytical cross-sectional study included 157 participants aged between 18 and 45 years, who were clinically examined and answered a questionnaire related to their lifestyle and daily habits (diet, parafunctional habits, temporomandibular disorders, general and oral health) and the Beck Anxiety Inventory. A descriptive analysis of the prevalence of DH and NCCL was performed, both at the individual level and considering the distribution among the teeth.
Article Synopsis
- The study investigates the role of immediate dentin sealing (IDS) in indirect restorations, aiming to determine if it should be a standard practice based on evidence from randomized clinical trials (RCT).
- A literature review identified data from four RCTs, indicating that IDS can reduce hypersensitivity one week after restoration cementation but shows no difference in longevity of the restorations.
- The conclusion suggests that while IDS can be beneficial, especially for patients at risk of sensitivity, it should be viewed as an optional step rather than a mandatory one.
Bibliometric analysis and diagnostic efficacy of cone-beam computed tomography studies published in Imaging Science in Dentistry from 2011 to 2022.
Imaging Sci Dent
December 2023
Article Synopsis
- This bibliometric analysis focused on studies regarding cone-beam computed tomography (CBCT) published from 2011 to 2022, examining their characteristics, trends, and diagnostic effectiveness.
- The study found that most articles came from South Korea and Brazil, with Bong-Hae Cho and Yun-Hoa Jung being the top authors; the majority of publications were cross-sectional and laboratory-based, often discussing diagnostic capabilities.
- The analysis indicates a growing interest in CBCT research, primarily related to diagnosing pathologies in the oral and maxillofacial region, with most studies rated as high as level 2 in diagnostic efficacy.
Background: The aim of this study was to evaluate the nanoleakage and microtensile bond strength (μTBS) of an ethanol based-adhesive containing Titanium dioxide (TiO2) nanofibers to dentin.
Material And Methods: TiO2 nanofiber was produced by electrospinning and it was inserted in an ethanol-based adhesive in 0.5, 1.
Background: The aim was to estimate the prevalence of reuse of healing abutments, the methods used in disinfection and to analyze the reasons that lead to the reuse of these components by professionals who work in rehabilitation with dental implants.
Material And Methods: For this, an online data collection was carried out through a questionnaire developed in Google Forms. This questionnaire was applied to 284 specialists in implantology, randomized, of the 1,147 registered in the Regional Council of Dentistry of Rio Grande do Sul.
Cytotoxicity assessment of Bio-C Repair Íon+: A new calcium silicate-based cement.
J Dent Res Dent Clin Dent Prospects
August 2021
Direct pulp capping is a method designed to preserve the exposed dental pulp. Due to good biological, physical, and mechanical properties, new versions of calcium silicate-based materials have been developed as pulp capping materials. The present study aimed to evaluate the cytotoxic effects of four calcium silicate-based pulp capping materials, of which the Bio-C Repair Íon+ is still in an experimental phase.
View Article and Find Full Text PDFThe aim of this study was to evaluate the degree of conversion, cytotoxicity, solubility and pH of photopolymerizable calciumbased cements submitted to preheating. The degree of conversion was analyzed by Fourier transform infrared, cytotoxicity by the MTT test and solubility through loss of mass. The data were subjected to statistical tests (ANOVA / Tukey's, p<0.
View Article and Find Full Text PDFTo assess, in vitro, the influence of heat air treatment on cytotoxicity and degree of conversion (DC) of universal self-etch adhesives (Ambar Universal APS, Scotchbond Universal Adhesive, and Tetric N-Bond Universal) in an NIH/3T3 fibroblast cell culture. Samples were divided into three groups: 1) no heat treatment (control), 2) 37°C and 3) 60°C heat treatment before photopolymerization. Cytotoxicity was analyzed by MTT assay and the DC by FTIR.
View Article and Find Full Text PDFBackground: The light-cured calcium hydroxide based cements have incomplete polymerization and unconverted monomers can cause pulp cell damage. The aim of this study was to evaluate the influence of a warm and hot air stream on the cytotoxicity of light-cured calcium hydroxide based cements.
Material And Methods: The materials Dycal (conventional cement), Biocal, Hidrox-Cal, and Ultra-Blend Plus (light-cured calcium hydroxide cements) were submitted to cytotoxicity analysis after polymerization, without vs.
Article Synopsis
- The study investigated how different heat treatments before photopolymerization affect the cytotoxicity of self-adhesive resin cements on NIH/3T3 fibroblast cells.
- Samples were divided into three groups: no heat treatment, 37°C, and 60°C, with results from cell cultures assessed at both 24 hours and 7 days post-mixing.
- Findings showed that heat treatment at 60°C significantly reduced cytotoxicity across all cement types, suggesting it could be a beneficial method for minimizing harmful effects.
Aim: The aim of this study is to assess marginal microleakage of cervical cavities restored with composite resins and two different adhesive techniques subjected to at-home and in-office bleaching.
Materials And Methods: In this randomized, blind laboratory experiment, 60 bovine teeth recently extracted were collected and divided into six groups (n = 10 each group). The teeth received cervical cavity preparations (2 mm × 3 mm × 1 mm) with enamel margins.