cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7419314.v1
title: A Survey About Dental Instruments at the Primary Health Care in Brazil

description: Abstract This study describes the structure of oral health services in primary health care in Brazil and the instruments available for the provision of oral health care and to compare the number of instruments according to organizational characteristics of health services and among the macroregions. Of the 23,251 oral health teams (OHTs) in the Public Health System, 17,513 (75.3%) participated in this study. Trained researchers observed the structures of the health services and determined the presence of and whether a sufficient quantity of 36 dental instruments existed. The score of each oral health service was determined by the sum of the number of dental instruments present in sufficient quantity (0 to 36). Central tendency measures were compared along with the variability in these scores according to the organizational characteristics of the services and according to the Brazilian macroregion. No instrument was found to be present in all evaluated services. Basic, surgical and restorative instruments were the most frequently found. Periodontal, endodontic and prosthetic instruments exhibited the lowest percentages. The mean and median numbers of dental instruments were higher for teams that operated over more shifts, those with an oral health technician and those in the South and Southeast regions. The oral health services were equipped with basic, surgical and restorative instruments. Instruments designed for periodontal diagnosis, emergency care and denture rehabilitation were less frequently found in these services. The worst infrastructure conditions existed in the OHTs with the worst forms of care organization and in regions with greater social issues.
DOI: 10.6084/m9.figshare.7419323
title: In Vitro Analysis of the Cytotoxicity of Indirect Restorative Materials

description: Abstract This study aimed to compare the cytotoxicity of the Vita AC12, Lava Ultimate, Vita Enamic and InSync indirect restorative materials. Extracts of each material were prepared by incubation for 1, 7 and 40 days, with daily washing. Human gingival fibroblasts were exposed to the extracts, and cell viability was evaluated by sequential assessment of mitochondrial activity (XTT), membrane integrity (NRU) and cell density (CVDE). Extracts of polystyrene beads and latex fragments were used as negative and positive controls, respectively. Differences between groups and experimental times were evaluated by analysis of variance. At the 24 h extraction, significant differences between the control and both Vita AC-12 and InSync were observed in the XTT assay (p&lt;0.05), and between the control and both Enamic and Lava Ultimate, in the CVDE assay (p&lt;0.05). AC12, Lava Ultimate, and InSync presented significantly lower cell viability than Enamic and the control group, in the NRU assay (p&lt;0.05). The Vita Enamic and Lava Ultimate hybrid ceramic-like materials presented better biocompatibility at the 24 h extraction time point than the AC12 and InSync ceramic materials. However, a simulation of the removal of toxic components by biological fluids, conducted by using longer extraction times and daily washing, led to the absence of cytotoxicity in all the tested restorative materials. These findings can be viewed as positive for the clinical indication of these restorative materials, considering their contact with adjacent soft tissues for extended periods of time.
DOI: 10.6084/m9.figshare.7419323.v1
title: In Vitro Analysis of the Cytotoxicity of Indirect Restorative Materials

description: Abstract This study aimed to compare the cytotoxicity of the Vita AC12, Lava Ultimate, Vita Enamic and InSync indirect restorative materials. Extracts of each material were prepared by incubation for 1, 7 and 40 days, with daily washing. Human gingival fibroblasts were exposed to the extracts, and cell viability was evaluated by sequential assessment of mitochondrial activity (XTT), membrane integrity (NRU) and cell density (CVDE). Extracts of polystyrene beads and latex fragments were used as negative and positive controls, respectively. Differences between groups and experimental times were evaluated by analysis of variance. At the 24 h extraction, significant differences between the control and both Vita AC-12 and InSync were observed in the XTT assay (p&lt;0.05), and between the control and both Enamic and Lava Ultimate, in the CVDE assay (p&lt;0.05). AC12, Lava Ultimate, and InSync presented significantly lower cell viability than Enamic and the control group, in the NRU assay (p&lt;0.05). The Vita Enamic and Lava Ultimate hybrid ceramic-like materials presented better biocompatibility at the 24 h extraction time point than the AC12 and InSync ceramic materials. However, a simulation of the removal of toxic components by biological fluids, conducted by using longer extraction times and daily washing, led to the absence of cytotoxicity in all the tested restorative materials. These findings can be viewed as positive for the clinical indication of these restorative materials, considering their contact with adjacent soft tissues for extended periods of time.
DOI: 10.6084/m9.figshare.7974824
title: Clinical Assessment of Rosemary-based Toothpaste (Rosmarinus officinalis Linn.): A Randomized Controlled Double-blind Study

description: Abstract The present study was to investigate the action of a toothpaste made from the extract of Rosmarinus officinalis Linn. (rosemary) in a clinical randomized, controlled, open and double-blind trial. One hundred and ten volunteers fulfilled the inclusion criteria and were randomly separated into two groups according to the toothpastes used: Group A (experimental) and Group B (control). They were assessed at baseline and 30 days after the study using the gingival bleeding index (GBI) and the plaque index (PI). Data analysis was conducted to calculate the effects of the two toothpastes on gingival bleeding and plaque, using measurements such as the excess relative risk (ERR), the Relative Risk Reduction (RRR), the Absolute Risk Reduction (ARR) and the Number Needed for Treatment (NNT). The two toothpastes provided similar results in terms of the reduction in the risk of gingival bleeding (relative and absolute): a reduction of 38% in Group A, ERR=0.38; a reduction of 29.3% in Group B, ERR=0.293; A and B reduced by 18% ARR=0.18). The reductions in bacterial plaque were also similar (22.7% reduction in Group A, RRR=0.227; 28% reduction in Group B, RRR= 0.28). The number needed for treatment values for bleeding and plaque were A and B NNT=5 and A and B NNT=7, respectively. The rosemary-based toothpaste effectively treated gingival bleeding and reduced bacterial plaque, when compared with conventional toothpaste.
DOI: 10.6084/m9.figshare.7974824.v1
title: Clinical Assessment of Rosemary-based Toothpaste (Rosmarinus officinalis Linn.): A Randomized Controlled Double-blind Study

description: Abstract The present study was to investigate the action of a toothpaste made from the extract of Rosmarinus officinalis Linn. (rosemary) in a clinical randomized, controlled, open and double-blind trial. One hundred and ten volunteers fulfilled the inclusion criteria and were randomly separated into two groups according to the toothpastes used: Group A (experimental) and Group B (control). They were assessed at baseline and 30 days after the study using the gingival bleeding index (GBI) and the plaque index (PI). Data analysis was conducted to calculate the effects of the two toothpastes on gingival bleeding and plaque, using measurements such as the excess relative risk (ERR), the Relative Risk Reduction (RRR), the Absolute Risk Reduction (ARR) and the Number Needed for Treatment (NNT). The two toothpastes provided similar results in terms of the reduction in the risk of gingival bleeding (relative and absolute): a reduction of 38% in Group A, ERR=0.38; a reduction of 29.3% in Group B, ERR=0.293; A and B reduced by 18% ARR=0.18). The reductions in bacterial plaque were also similar (22.7% reduction in Group A, RRR=0.227; 28% reduction in Group B, RRR= 0.28). The number needed for treatment values for bleeding and plaque were A and B NNT=5 and A and B NNT=7, respectively. The rosemary-based toothpaste effectively treated gingival bleeding and reduced bacterial plaque, when compared with conventional toothpaste.
DOI: 10.6084/m9.figshare.7974425
title: Glomus Tumor of the Oral Cavity: Report of a Rare Case and Literature Review

description: Abstract Glomus tumor is a benign neoplasm composed of a perivascular proliferation of glomic cells that resembles the normal glomus body. Usually, it appears as a solitary, symptomatic small blue-red nodule, located in the deep dermis or subcutis of upper or lower extremities of young to middle-aged adults. Cases affecting the oral cavity are very rare, with only 23 well-documented cases reported in the English-language literature. Herein, we present a rare case of glomus tumor of the upper lip, and review the literature of cases involving the mouth.
DOI: 10.6084/m9.figshare.7974425.v1
title: Glomus Tumor of the Oral Cavity: Report of a Rare Case and Literature Review

description: Abstract Glomus tumor is a benign neoplasm composed of a perivascular proliferation of glomic cells that resembles the normal glomus body. Usually, it appears as a solitary, symptomatic small blue-red nodule, located in the deep dermis or subcutis of upper or lower extremities of young to middle-aged adults. Cases affecting the oral cavity are very rare, with only 23 well-documented cases reported in the English-language literature. Herein, we present a rare case of glomus tumor of the upper lip, and review the literature of cases involving the mouth.
DOI: 10.6084/m9.figshare.7974128
title: Failure Probability, Stress Distribution and Fracture Analysis of Experimental Screw for Micro Conical Abutment

description: Abstract The aim of this study was to evaluate the failure probability of two types of abutment screws after compressive load and to analyze the stress distribution with finite element method. Sixty (60) single-tooth implant restorations were assembled on titanium implants (e-fix, A.S. Technology - Titanium Fix). The groups were divided into Conventional screw (Screw neck 1.5 ø mm) and Experimental screw (Screw neck constricted with 1.2 ø mm). Specimens were subjected to single load to failure with compressive test according ISO 14801. The fractured specimens were subjected to stereomicroscopy for measurement of remaining screws inside the implant and characterization of fracture origin. Representative specimens were analyzed by scanning electronic microscopy. For finite element method (FEM), an identical 3D model of the two in vitro test groups were used with similar conditions (30º, 100 N load). The stress in the abutment screw was analyzed by von-Mises criteria. The results of strength means were 4132.5 ± 76 MPa and 4528.2 ± 127.2 for conventional and experimental groups, respectively. During microscopy, the mean (mm) of the remaining screw piece inside the implants were 0.97 ± 0.23 and 1.32 ± 0.12 for conventional and experimental groups, respectively. In FEM, the conventional group showed stress concentered in an unfavorable region (peak of 39.23 MPa), while the experimental group showed more stress areas but less concentration than the conventional group (36.6 MPa). In using the tested experimental geometry, the abutment screw can have its strength improved, and the origin of failure can be more favorable to clinical resolution.
DOI: 10.6084/m9.figshare.7974128.v1
title: Failure Probability, Stress Distribution and Fracture Analysis of Experimental Screw for Micro Conical Abutment

description: Abstract The aim of this study was to evaluate the failure probability of two types of abutment screws after compressive load and to analyze the stress distribution with finite element method. Sixty (60) single-tooth implant restorations were assembled on titanium implants (e-fix, A.S. Technology - Titanium Fix). The groups were divided into Conventional screw (Screw neck 1.5 ø mm) and Experimental screw (Screw neck constricted with 1.2 ø mm). Specimens were subjected to single load to failure with compressive test according ISO 14801. The fractured specimens were subjected to stereomicroscopy for measurement of remaining screws inside the implant and characterization of fracture origin. Representative specimens were analyzed by scanning electronic microscopy. For finite element method (FEM), an identical 3D model of the two in vitro test groups were used with similar conditions (30º, 100 N load). The stress in the abutment screw was analyzed by von-Mises criteria. The results of strength means were 4132.5 ± 76 MPa and 4528.2 ± 127.2 for conventional and experimental groups, respectively. During microscopy, the mean (mm) of the remaining screw piece inside the implants were 0.97 ± 0.23 and 1.32 ± 0.12 for conventional and experimental groups, respectively. In FEM, the conventional group showed stress concentered in an unfavorable region (peak of 39.23 MPa), while the experimental group showed more stress areas but less concentration than the conventional group (36.6 MPa). In using the tested experimental geometry, the abutment screw can have its strength improved, and the origin of failure can be more favorable to clinical resolution.
DOI: 10.6084/m9.figshare.8227385
title: Simple and Low-Cost Thermal Treatments on Direct Resin Composites for Indirect Use

description: Abstract The aim of this study was to evaluate the influence of three low-cost additional thermal treatments, available in the dental office, on the mechanical, chemical and optical properties of a light-cured resin composite indicated for direct restorations but used as indirect restorative. The direct resin composite TPH3 (Dentsply) was light-polymerized using a light-emitting diode curing unit and submitted to three experimental additional thermal treatments: dry heat at 170 °C for 5 min, autoclave at 121 °C for 6 min, or microwave oven at 450 W for 3 min. The resin composite without any thermal treatment was used as negative control group. An indirect resin composite (Vita CM LC, Vita Zahnfabrik) was tested as a reference. Flexural strength, elastic modulus, microhardness, degree of C=C conversion, roughness before and after simulated toothbrush abrasion, translucency parameter and color difference (ΔE00) were evaluated. Data were analyzed at α=0.05. The indirect resin composite presented lower C=C conversion and mechanical performance. The flexural strength was significantly higher in the dry oven group compared with the control. The roughness was not different among groups before or after brushing, but the thermal treatments caused an increase in C=C conversion, microhardness, and elastic modulus without affecting the translucency parameter or showing visible color alteration (ΔE00&lt;1.8). These results suggest that the use of additional thermal methods of polymerization represents an economical and simple alternative to enhance the mechanical and chemical properties of direct resin composites when used as indirect restoratives.
DOI: 10.6084/m9.figshare.8227385.v1
title: Simple and Low-Cost Thermal Treatments on Direct Resin Composites for Indirect Use

description: Abstract The aim of this study was to evaluate the influence of three low-cost additional thermal treatments, available in the dental office, on the mechanical, chemical and optical properties of a light-cured resin composite indicated for direct restorations but used as indirect restorative. The direct resin composite TPH3 (Dentsply) was light-polymerized using a light-emitting diode curing unit and submitted to three experimental additional thermal treatments: dry heat at 170 °C for 5 min, autoclave at 121 °C for 6 min, or microwave oven at 450 W for 3 min. The resin composite without any thermal treatment was used as negative control group. An indirect resin composite (Vita CM LC, Vita Zahnfabrik) was tested as a reference. Flexural strength, elastic modulus, microhardness, degree of C=C conversion, roughness before and after simulated toothbrush abrasion, translucency parameter and color difference (ΔE00) were evaluated. Data were analyzed at α=0.05. The indirect resin composite presented lower C=C conversion and mechanical performance. The flexural strength was significantly higher in the dry oven group compared with the control. The roughness was not different among groups before or after brushing, but the thermal treatments caused an increase in C=C conversion, microhardness, and elastic modulus without affecting the translucency parameter or showing visible color alteration (ΔE00&lt;1.8). These results suggest that the use of additional thermal methods of polymerization represents an economical and simple alternative to enhance the mechanical and chemical properties of direct resin composites when used as indirect restoratives.
DOI: 10.6084/m9.figshare.8227391
title: Solvent Degradation and Polymerization Shrinkage Reduction of Resin Composites Using Isobornyl Methacrylate

description: Abstract The aim of this study was to use the isobornyl methacrylate (IBOMA) as a combining or substituent diluent monomer in the resin matrix of dental resin composites. Thus, the resin matrix was formulated with 60 wt% of BisGMA and 40 wt% of diluent monomers. TEGDMA as the only diluent monomer was used as control with 40 wt%, while total substitution of TEGDMA was done with 40 wt% of IBOMA. The combination of IBOMA and TEGDMA was done with 20 wt% of each monomer. To the resin matrix, 65 wt% of filler particles was added. Degree of conversion (DC) using FT-IR, flexural strength (FS), flexural modulus (FM), polymerization shrinkage by gap formation (GF), Knoop hardness (KH) and solvent degradation (SD) were evaluated. Data were analyzed using ANOVA and Tukey’s test (α=0.05; b=0.2). The results showed that reducing or substituting TEGDMA using IBOMA did not affect the DC (0.085), FS (p=0.886) or FM (p=0.414). Also, when IBOMA was used, lower GF was found in comparison to the control containing only TEGDMA as the diluent monomer (p=0.032). However, even though all composites presented reduction in KH during the SD test, the combination of IBOMA and TEGDMA showed similar reduction in KHN in comparison to the control group (p=0.001), while the total substitution of TEGDMA with IBOMA decreased KHN after SD (p=0.041). Thus, the combination of IBOMA and TEGDMA seem to reduce SD and GF without affecting the properties of resin composites.
DOI: 10.6084/m9.figshare.8227391.v1
title: Solvent Degradation and Polymerization Shrinkage Reduction of Resin Composites Using Isobornyl Methacrylate

description: Abstract The aim of this study was to use the isobornyl methacrylate (IBOMA) as a combining or substituent diluent monomer in the resin matrix of dental resin composites. Thus, the resin matrix was formulated with 60 wt% of BisGMA and 40 wt% of diluent monomers. TEGDMA as the only diluent monomer was used as control with 40 wt%, while total substitution of TEGDMA was done with 40 wt% of IBOMA. The combination of IBOMA and TEGDMA was done with 20 wt% of each monomer. To the resin matrix, 65 wt% of filler particles was added. Degree of conversion (DC) using FT-IR, flexural strength (FS), flexural modulus (FM), polymerization shrinkage by gap formation (GF), Knoop hardness (KH) and solvent degradation (SD) were evaluated. Data were analyzed using ANOVA and Tukey’s test (α=0.05; b=0.2). The results showed that reducing or substituting TEGDMA using IBOMA did not affect the DC (0.085), FS (p=0.886) or FM (p=0.414). Also, when IBOMA was used, lower GF was found in comparison to the control containing only TEGDMA as the diluent monomer (p=0.032). However, even though all composites presented reduction in KH during the SD test, the combination of IBOMA and TEGDMA showed similar reduction in KHN in comparison to the control group (p=0.001), while the total substitution of TEGDMA with IBOMA decreased KHN after SD (p=0.041). Thus, the combination of IBOMA and TEGDMA seem to reduce SD and GF without affecting the properties of resin composites.
DOI: 10.6084/m9.figshare.8227058
title: Does the Use of Reservoirs Have Any Impact on the Efficacy of At-Home Bleaching? A Systematic Review

description: Abstract To answer the following focused question through a systematic review: “Are the risk and intensity of tooth sensitivity (TS) and bleaching efficacy different between adult patients who undergo at-home bleaching using trays with reservoirs and those who use trays without reservoirs?”. A comprehensive search was performed in the MEDLINE via PubMed, Scopus, Web of Science, Latin American and Caribbean Health Sciences Literature database, Brazilian Library in Dentistry, Cochrane Library, and grey literature without restrictions. Abstracts from conferences; unpublished and ongoing trial registries, dissertations and theses (ProQuest Dissertations and Periódicos Capes Theses databases) were searched. Only randomized clinical trials (RCTs) were included. We used the Risk of Bias tool (RoB) from the Cochrane Collaboration for quality assessment. After the removal of duplicates, title and abstract screening and full-text examination, nine RCTs remained for qualitative analyses. The great majority of the studies did not report the method of randomization, allocation concealment, and examiner blinding during color assessment. From the nine studies, eight were at unclear risk of bias. In regard to color change, four studies reported no change and two reported improved color change with reservoirs. Only four studies recorded tooth sensitivity and they reported no significant differences. Only one study reported greater gingival irritation with reservoirs. Lack of data reporting prevented us from running a meta-analysis. Further well-designed RCT should be conducted to answer this research question. So far there is not evidence to support that reservoirs in bleaching trays improve color change. PROSPERO - CRD42016037628
DOI: 10.6084/m9.figshare.8227058.v1
title: Does the Use of Reservoirs Have Any Impact on the Efficacy of At-Home Bleaching? A Systematic Review

description: Abstract To answer the following focused question through a systematic review: “Are the risk and intensity of tooth sensitivity (TS) and bleaching efficacy different between adult patients who undergo at-home bleaching using trays with reservoirs and those who use trays without reservoirs?”. A comprehensive search was performed in the MEDLINE via PubMed, Scopus, Web of Science, Latin American and Caribbean Health Sciences Literature database, Brazilian Library in Dentistry, Cochrane Library, and grey literature without restrictions. Abstracts from conferences; unpublished and ongoing trial registries, dissertations and theses (ProQuest Dissertations and Periódicos Capes Theses databases) were searched. Only randomized clinical trials (RCTs) were included. We used the Risk of Bias tool (RoB) from the Cochrane Collaboration for quality assessment. After the removal of duplicates, title and abstract screening and full-text examination, nine RCTs remained for qualitative analyses. The great majority of the studies did not report the method of randomization, allocation concealment, and examiner blinding during color assessment. From the nine studies, eight were at unclear risk of bias. In regard to color change, four studies reported no change and two reported improved color change with reservoirs. Only four studies recorded tooth sensitivity and they reported no significant differences. Only one study reported greater gingival irritation with reservoirs. Lack of data reporting prevented us from running a meta-analysis. Further well-designed RCT should be conducted to answer this research question. So far there is not evidence to support that reservoirs in bleaching trays improve color change. PROSPERO - CRD42016037628