cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7517033.v1
title: Correlations between supra- and subgingival clinical parameters in smokers and individuals who have never smoked

description: Introduction Smoking is a risk factor for prevalence, severity and progression of periodontal disease and appears to suppress marginal periodontium inflammatory response. Purpose To correlate Visible Plaque Index (VPI) and Gingival Bleeding Index (GBI) in smokers and never-smokers, as well as GBI and bleeding on probing (BOP ) in these groups. Material and method We used baseline data of one quasi-experimental study in which 11 smokers and 14 subjects who never smoked were submitted to clinical periodontal examinations between September 2010 and October 2011. Result The correlation between VPI and GBI was positive for both groups, it was strong and statistically significant in subjects who had never smoked and moderate in smokers. Regarding GBI and BOP correlations were moderate for smokers and weaker for individuals who had never smoked. Conclusion Smokers have lower strength correlation between VPI and GBI compared to individuals who had never smoked resulting in a less pronounced marginal gingival bleeding.
DOI: 10.6084/m9.figshare.7517018.v1
title: Evaluation of postoperative pain after endodontic treatment with foraminal enlargement and obturation using two auxiliary chemical protocols

description: Aim This prospective randomized clinical study examined the influence of two different auxiliary chemical substances on postoperative pain in 301 single-visit endodontic treatments, with enlargement of the apical foramen and extrusion of cement into the periapical region. Material and method The two auxiliary chemicals used were 2% chlorhexidine (2% CHX gel; n = 145) and 5.25% sodium hypochlorite (5.25% NaOCl; n = 156). The incidence of postoperative pain and discomfort was assessed at 24 hours and expressed as percentages. The Fisher exact test and the Chi-square test were used to compare variation in postoperative pain. The variables analyzed were previous pain, pulp status, age, and number of root canals. Result In teeth with previous pain instrumented with 2% CHX gel, the incidence of postoperative pain was 22.22% (6/27) versus 11.11% (3/22) in teeth instrumented with 5.25% NaOCl. In teeth without previous pain instrumented with 2% CHX gel, the incidence of postoperative pain was 8.5% (6/118) versus 2.33% (3/129) in teeth instrumented with 5.25% NaOCl, with no statistically significant difference between the groups. Results showed that previous pain had a significant influence on postoperative status (p
DOI: 10.6084/m9.figshare.7517018
title: Evaluation of postoperative pain after endodontic treatment with foraminal enlargement and obturation using two auxiliary chemical protocols

description: Aim This prospective randomized clinical study examined the influence of two different auxiliary chemical substances on postoperative pain in 301 single-visit endodontic treatments, with enlargement of the apical foramen and extrusion of cement into the periapical region. Material and method The two auxiliary chemicals used were 2% chlorhexidine (2% CHX gel; n = 145) and 5.25% sodium hypochlorite (5.25% NaOCl; n = 156). The incidence of postoperative pain and discomfort was assessed at 24 hours and expressed as percentages. The Fisher exact test and the Chi-square test were used to compare variation in postoperative pain. The variables analyzed were previous pain, pulp status, age, and number of root canals. Result In teeth with previous pain instrumented with 2% CHX gel, the incidence of postoperative pain was 22.22% (6/27) versus 11.11% (3/22) in teeth instrumented with 5.25% NaOCl. In teeth without previous pain instrumented with 2% CHX gel, the incidence of postoperative pain was 8.5% (6/118) versus 2.33% (3/129) in teeth instrumented with 5.25% NaOCl, with no statistically significant difference between the groups. Results showed that previous pain had a significant influence on postoperative status (p
DOI: 10.6084/m9.figshare.7511051
title: Orthosystem: software for the mixed dentition analysis

description: Introduction The analysis of mixed dentition is essential for diagnosis in Orthodontics to estimate size of unerupted permanent teeth and evaluate if the dental volume is in accordance with the arch lenght. Currently, there are softwares that perform the analysis of dental casts in 2D and 3D. However, these programs are still very expensive. Aim The aim of this study was to develop a software (OrthoSystem) to be used by undergraduate and postgraduate orthodontics students to perform the mixed dentition analysis of Moyers. Method To evaluate the accuracy and the time consumption, 60 pairs of dental casts were evaluated according Moyers analysis both manually and through the use of the software. Questionnaires were administered to 72 undergraduate Dentistry students to test the usability of the program. Result The program had the accuracy validated, showing a perfect agreement (p = 1) and a time consuption of 4.2 minutes less when compared with the manual method to do the mixed dentition analysis. In addition, the OrthoSystem was considered excellent in usability and better than the conventional method by the students. Conclusion The OrthoSystem software is efficient and was considered excellent for undergraduate Dentistry students.
DOI: 10.6084/m9.figshare.7511054
title: Effects of dentin on the pH and antimicrobial activity of several calcium hydroxide formulations

description: Objective To evaluate the dentin effect on pH and antimicrobial activity of the calcium hydroxide chemical formulations. Material and method pH and antimicrobial activity of calcium hydroxide formulations were evaluated (G1-polyethyleneglycol, G2-glycerin and camphorated paramonochlorophenol and G3-chlorhexidine). The formulations were evaluated alone (G1A, G2A e G3A) or with dentin powder (G1B, G2B and G3B). Polyethylene tubes were filled with the formulation and immersed in distilled water. After 24 hours, 7, 14 and 21 days, pH was evaluated. The antimicrobial activity was evaluated against Enterococcus faecalis by agar diffusion test. All data were submitted to ANOVA and Tukey tests (p=0.05). Result None effect was observed on pH and antimicrobial activity by dentin on different chemical formulations, except the reduction occurred in G1 at 24 hours (p &lt;0.05). When compared between the groups at 24 hours and 7 days, G1A and G1B had a lower pH (p &lt;0.05). At 14 days, G2A, G2B, G3A and G3B showed similar pH (p &lt;0.05) and between G3B and G1A (p&gt; 0.05). At 21 days, all formulations were similar (p&gt; 0.05). Regarding antimicrobial activity G2B G2A =&gt; = G3A G3B&gt; = G1A G1B (p &lt;0.05). Conclusion The dentin did not affect the pH and antimicrobial activity of different formulations containing calcium hydroxide, except in association with polyethylene glycol, which caused the reduction of pH, within 24 hours. The formulation with paramonochlorophenol camphor showed higher antimicrobial activity, followed by chlorhexidine and polyethylene glycol.
DOI: 10.6084/m9.figshare.7511054.v1
title: Effects of dentin on the pH and antimicrobial activity of several calcium hydroxide formulations

description: Objective To evaluate the dentin effect on pH and antimicrobial activity of the calcium hydroxide chemical formulations. Material and method pH and antimicrobial activity of calcium hydroxide formulations were evaluated (G1-polyethyleneglycol, G2-glycerin and camphorated paramonochlorophenol and G3-chlorhexidine). The formulations were evaluated alone (G1A, G2A e G3A) or with dentin powder (G1B, G2B and G3B). Polyethylene tubes were filled with the formulation and immersed in distilled water. After 24 hours, 7, 14 and 21 days, pH was evaluated. The antimicrobial activity was evaluated against Enterococcus faecalis by agar diffusion test. All data were submitted to ANOVA and Tukey tests (p=0.05). Result None effect was observed on pH and antimicrobial activity by dentin on different chemical formulations, except the reduction occurred in G1 at 24 hours (p &lt;0.05). When compared between the groups at 24 hours and 7 days, G1A and G1B had a lower pH (p &lt;0.05). At 14 days, G2A, G2B, G3A and G3B showed similar pH (p &lt;0.05) and between G3B and G1A (p&gt; 0.05). At 21 days, all formulations were similar (p&gt; 0.05). Regarding antimicrobial activity G2B G2A =&gt; = G3A G3B&gt; = G1A G1B (p &lt;0.05). Conclusion The dentin did not affect the pH and antimicrobial activity of different formulations containing calcium hydroxide, except in association with polyethylene glycol, which caused the reduction of pH, within 24 hours. The formulation with paramonochlorophenol camphor showed higher antimicrobial activity, followed by chlorhexidine and polyethylene glycol.
DOI: 10.6084/m9.figshare.7511051.v1
title: Orthosystem: software for the mixed dentition analysis

description: Introduction The analysis of mixed dentition is essential for diagnosis in Orthodontics to estimate size of unerupted permanent teeth and evaluate if the dental volume is in accordance with the arch lenght. Currently, there are softwares that perform the analysis of dental casts in 2D and 3D. However, these programs are still very expensive. Aim The aim of this study was to develop a software (OrthoSystem) to be used by undergraduate and postgraduate orthodontics students to perform the mixed dentition analysis of Moyers. Method To evaluate the accuracy and the time consumption, 60 pairs of dental casts were evaluated according Moyers analysis both manually and through the use of the software. Questionnaires were administered to 72 undergraduate Dentistry students to test the usability of the program. Result The program had the accuracy validated, showing a perfect agreement (p = 1) and a time consuption of 4.2 minutes less when compared with the manual method to do the mixed dentition analysis. In addition, the OrthoSystem was considered excellent in usability and better than the conventional method by the students. Conclusion The OrthoSystem software is efficient and was considered excellent for undergraduate Dentistry students.
DOI: 10.6084/m9.figshare.7518908
title: Evaluation of antimicrobial susceptibility of facultative anaerobic bacteria isolated in root-filled teeth with persistent infection front to use of systemic antibiotics

description: AbstractIntroductionBacteria associated with failure endodontic treatment are capable of acquiring and expressing resistance against antimicrobial agents usually used to treat infections, which makes necessary, in some cases, laboratory tests in order to detect the resistance or antimicrobial susceptibility of these microorganisms.Objectiveto evaluate the antimicrobial susceptibility of Enterococcus faecalis, Enterococcus faecium, Actinomyces viscosus and Staphylococcus aureus strains isolated from root canals of teeth with failure endodontic treatment.Material and methodEnterococcus faecalis (n=3), Enterococcus faecium (n=3), Actinomyces viscosus (n=3) and Staphylococcus aureus (n=3) clinical strains collected in vivo from root-filled canals with failure endodontic treatment thad been their antimicrobial susceptibility tested by the E-test method in duplicate using the antibiotics: Amoxicillin (AC), Rifampicin (RI), Moxifloxacin (MX), Vancomycin (VA), Tetracycline (TC), Ciprofloxacin (CI), Chloranphenicol (CL), Benzilpenicillin (PG), Amoxicillin + clavulanic acid (XL), Doxycycline (DC), Erythromycin (EM) e Azithromycin (AZ).Resultall the clinical strains tested were susceptible to AC, XL, PG, DC, MX, TC e VA. All the isolated S. aureus strains were susceptible to the 12 tested antibiotics. E. faecalis, E. faecium and A. viscosus strains showed intermediary susceptibility pattern against EM. Some E. faecalis and E. faecium strains were resistant against AZ and RI.Conclusionclinical strains isolated from radicular canals of teeth with failure endodontic treatment showed different antimicrobial susceptibility profiles, and none of E. faecalis or E. faeciumstrains appeared to be susceptible to AZ or EM.
DOI: 10.6084/m9.figshare.7518908.v1
title: Evaluation of antimicrobial susceptibility of facultative anaerobic bacteria isolated in root-filled teeth with persistent infection front to use of systemic antibiotics

description: AbstractIntroductionBacteria associated with failure endodontic treatment are capable of acquiring and expressing resistance against antimicrobial agents usually used to treat infections, which makes necessary, in some cases, laboratory tests in order to detect the resistance or antimicrobial susceptibility of these microorganisms.Objectiveto evaluate the antimicrobial susceptibility of Enterococcus faecalis, Enterococcus faecium, Actinomyces viscosus and Staphylococcus aureus strains isolated from root canals of teeth with failure endodontic treatment.Material and methodEnterococcus faecalis (n=3), Enterococcus faecium (n=3), Actinomyces viscosus (n=3) and Staphylococcus aureus (n=3) clinical strains collected in vivo from root-filled canals with failure endodontic treatment thad been their antimicrobial susceptibility tested by the E-test method in duplicate using the antibiotics: Amoxicillin (AC), Rifampicin (RI), Moxifloxacin (MX), Vancomycin (VA), Tetracycline (TC), Ciprofloxacin (CI), Chloranphenicol (CL), Benzilpenicillin (PG), Amoxicillin + clavulanic acid (XL), Doxycycline (DC), Erythromycin (EM) e Azithromycin (AZ).Resultall the clinical strains tested were susceptible to AC, XL, PG, DC, MX, TC e VA. All the isolated S. aureus strains were susceptible to the 12 tested antibiotics. E. faecalis, E. faecium and A. viscosus strains showed intermediary susceptibility pattern against EM. Some E. faecalis and E. faecium strains were resistant against AZ and RI.Conclusionclinical strains isolated from radicular canals of teeth with failure endodontic treatment showed different antimicrobial susceptibility profiles, and none of E. faecalis or E. faeciumstrains appeared to be susceptible to AZ or EM.
DOI: 10.6084/m9.figshare.7513628
title: Biological characterization of implant surfaces - in vitro study

description: AbstractObjectiveEvaluate the biological performance of titanium alloys grade IV under different surface treatments: sandblasting and double etching (Experimental surface 1; Exp1, NEODENT); surface with wettability increase (Experimental surface 2; Exp2, NEODENT) on response of preliminary differentiation and cell maturation.Material and methodImmortalized osteoblast cells were plated on Exp1 and Exp2 titanium discs. The polystyrene plate surface without disc was used as control group (C). Cell viability was assessed by measuring mitochondrial activity (MTT) at 4 and 24 h (n = 5), cell attachment was performed using trypan blue exclusion within 4 hours (n = 5), serum total protein and alkaline phosphatase normalization was performed at 4, 7 and 14 days (n = 5). Data were analyzed using one-way ANOVA and Tukey test.ResultThe values of cell viability were: 4h: C– 0.32±0.01A; Exp1– 0.34±0.08A; Exp2– 0.29±0.03A. 24h: C– 0.43±0.02A; Exp1– 0.39±0.01A; Exp2– 0.37±0.03A. The cell adhesion counting was: C– 85±10A; Exp1- 35±5B; Exp2– 20±2B. The amounts of serum total protein were 4d: C– 40±2B; Exp1– 120±10A; Exp2– 130±20A. 7d: C– 38±2B; Exp1– 75±4A; Exp2– 70±6A. 14 d: C– 100±3A; Exp1– 130±5A; Exp2– 137±9A. The values of alkaline phosphatase normalization were: 4d: C– 2.0±0.1C; Exp1– 5.1±0.8B; Exp2– 9.8±2.0A. 7d: C– 1.0±0.01C; Exp1– 5.3±0.5A; Exp2– 3.0±0.3B. 14 d: C– 4.1±0.3A; Exp1– 4.4±0.8A; Exp2– 2.2±0.2B. Different letters related to statistical differences.ConclusionThe surfaces tested exhibit different behavior at dosage of alkaline phosphatase normalization showing that the Exp2 is more associated with induction of cell differentiation process and that Exp1 is more related to the mineralization process.
DOI: 10.6084/m9.figshare.7513628.v1
title: Biological characterization of implant surfaces - in vitro study

description: AbstractObjectiveEvaluate the biological performance of titanium alloys grade IV under different surface treatments: sandblasting and double etching (Experimental surface 1; Exp1, NEODENT); surface with wettability increase (Experimental surface 2; Exp2, NEODENT) on response of preliminary differentiation and cell maturation.Material and methodImmortalized osteoblast cells were plated on Exp1 and Exp2 titanium discs. The polystyrene plate surface without disc was used as control group (C). Cell viability was assessed by measuring mitochondrial activity (MTT) at 4 and 24 h (n = 5), cell attachment was performed using trypan blue exclusion within 4 hours (n = 5), serum total protein and alkaline phosphatase normalization was performed at 4, 7 and 14 days (n = 5). Data were analyzed using one-way ANOVA and Tukey test.ResultThe values of cell viability were: 4h: C– 0.32±0.01A; Exp1– 0.34±0.08A; Exp2– 0.29±0.03A. 24h: C– 0.43±0.02A; Exp1– 0.39±0.01A; Exp2– 0.37±0.03A. The cell adhesion counting was: C– 85±10A; Exp1- 35±5B; Exp2– 20±2B. The amounts of serum total protein were 4d: C– 40±2B; Exp1– 120±10A; Exp2– 130±20A. 7d: C– 38±2B; Exp1– 75±4A; Exp2– 70±6A. 14 d: C– 100±3A; Exp1– 130±5A; Exp2– 137±9A. The values of alkaline phosphatase normalization were: 4d: C– 2.0±0.1C; Exp1– 5.1±0.8B; Exp2– 9.8±2.0A. 7d: C– 1.0±0.01C; Exp1– 5.3±0.5A; Exp2– 3.0±0.3B. 14 d: C– 4.1±0.3A; Exp1– 4.4±0.8A; Exp2– 2.2±0.2B. Different letters related to statistical differences.ConclusionThe surfaces tested exhibit different behavior at dosage of alkaline phosphatase normalization showing that the Exp2 is more associated with induction of cell differentiation process and that Exp1 is more related to the mineralization process.
DOI: 10.6084/m9.figshare.7515566
title: Effect of intensity of light sources and barriers in ceramic hardness of dual-cured cement

description: AbstractIntroductionThe dual-cure resin cement is the main material for luting of ceramic. However, factors such as light source can influence the performance of the cement.ObjectiveEvaluate the influence of two light sources of different intensities on the microhardness of a resin cement when cured under different ceramics.Material and methodForty samples of dual resin cement were photoactivated by two LED light sources, with light intensity of 1000mW/cm² and 800mW/cm², respectively (40 seconds), under the base ceramic Zirconia, Spinel MgAl2O4 and Lithium Disilicate. In the control group, a glass plate was used. Each samples had the surface grounded (600 and 1200). After dry storage in the dark (24 hours), Vickers microhardness measurements were performed (HMV Shimadzu - 50gf/10 seconds). The data were submitted to factorial ANOVA and Tukey's test with significance level of 5%.ResultThe average hardness and standard deviation in the control group for cement polymerized 1000mW/cm² was 43.9±1.5 and 800mW/cm² the value of 43.4±1.3. The lowest value was for the Ceramic base of spinel MgAl2O4, light cured with 800mW/cm² with a value of 34.3±3.3.ConclusionThe ceramic type and intensity of the light source influence the hardness of the cement. The polymerization 1000mW/cm2 on the ceramic based on zirconia and spinel MgAl2O4 resulted in the best combination of hardness cement.
DOI: 10.6084/m9.figshare.7515566.v1
title: Effect of intensity of light sources and barriers in ceramic hardness of dual-cured cement

description: AbstractIntroductionThe dual-cure resin cement is the main material for luting of ceramic. However, factors such as light source can influence the performance of the cement.ObjectiveEvaluate the influence of two light sources of different intensities on the microhardness of a resin cement when cured under different ceramics.Material and methodForty samples of dual resin cement were photoactivated by two LED light sources, with light intensity of 1000mW/cm² and 800mW/cm², respectively (40 seconds), under the base ceramic Zirconia, Spinel MgAl2O4 and Lithium Disilicate. In the control group, a glass plate was used. Each samples had the surface grounded (600 and 1200). After dry storage in the dark (24 hours), Vickers microhardness measurements were performed (HMV Shimadzu - 50gf/10 seconds). The data were submitted to factorial ANOVA and Tukey's test with significance level of 5%.ResultThe average hardness and standard deviation in the control group for cement polymerized 1000mW/cm² was 43.9±1.5 and 800mW/cm² the value of 43.4±1.3. The lowest value was for the Ceramic base of spinel MgAl2O4, light cured with 800mW/cm² with a value of 34.3±3.3.ConclusionThe ceramic type and intensity of the light source influence the hardness of the cement. The polymerization 1000mW/cm2 on the ceramic based on zirconia and spinel MgAl2O4 resulted in the best combination of hardness cement.
DOI: 10.6084/m9.figshare.7518509
title: Analysis of the mental foramen using cone beam computerized tomography

description: AbstractIntroductionKnowledge of the anatomical structures located in the region between the mental foramina is of critical importance in pre-operative planning.ObjectiveTo evaluate the position of the mental foramen relative to the apices of the teeth and the distance to the edges of the mandible, using cone beam computerized tomography.Material and methodOne hundred cone beam computerized tomographs of the mandible were evaluated; the tomographs were taken using a single tomographic device. Each image chosen was evaluated repeatedly from both sides of the mandible, the position of the mental foramen, indicating the region in which the foramen was found and the measures of the mental foramen, the lingual cortex and the mandibular base. Initially, the data were analyzed descriptively. A value of p&lt;0.05 was chosen as the level of significance.ResultForty-two percent of the mental foramina were located in the apex of the second pre-molar. The lingual margin of the mental foramen was located, on average, 3.1mm from the lingual cortex. The lower margin of the mental foramen was located 7.25 mm above the lower edge of the mandible.ConclusionThe mental foramen was located more frequently at a level of the apices of the second pre-molars, with a distance to the lingual cortex, on average, of 3.1mm and to the base of the mandible, on average, of 7.25 mm.
DOI: 10.6084/m9.figshare.7518509.v1
title: Analysis of the mental foramen using cone beam computerized tomography

description: AbstractIntroductionKnowledge of the anatomical structures located in the region between the mental foramina is of critical importance in pre-operative planning.ObjectiveTo evaluate the position of the mental foramen relative to the apices of the teeth and the distance to the edges of the mandible, using cone beam computerized tomography.Material and methodOne hundred cone beam computerized tomographs of the mandible were evaluated; the tomographs were taken using a single tomographic device. Each image chosen was evaluated repeatedly from both sides of the mandible, the position of the mental foramen, indicating the region in which the foramen was found and the measures of the mental foramen, the lingual cortex and the mandibular base. Initially, the data were analyzed descriptively. A value of p&lt;0.05 was chosen as the level of significance.ResultForty-two percent of the mental foramina were located in the apex of the second pre-molar. The lingual margin of the mental foramen was located, on average, 3.1mm from the lingual cortex. The lower margin of the mental foramen was located 7.25 mm above the lower edge of the mandible.ConclusionThe mental foramen was located more frequently at a level of the apices of the second pre-molars, with a distance to the lingual cortex, on average, of 3.1mm and to the base of the mandible, on average, of 7.25 mm.