cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.5980081.v1
title: Structural factors for public dental health services in Regional Health Care Network 13: an analysis of the Brazilian National Program for Improving Access and Quality of Primary Care

description: Abstract Introduction The Brazilian National Program for Improving Access and Quality of Primary Care aims to induce the institution of processes that expand the capacity of federal, state and municipal administrations and Primary Care teams to offer services that ensure greater access and quality. Objective To identify the characteristics of infrastructure for the dental health care of the health units from the Regional Health Care Network 13, from the perspective of a health evaluation. Material and method This is a descriptive and cross-sectional study in which is used the Module V database of the External Evaluation instrument of 156 health units of this region that participated of the 2nd cycle of the referred program, which discuss the modality of the health teams, structure and environment of the dental office, the hours of operation, equipment, instruments and dental supplies. Result In general, the oral health units of this study have dental offices with good structural conditions and sufficient equipment and supplies to carry out clinical activities, except those for dental prostheses, possibly due to the permanence of this service in secondary care. However, they point out that advances in access and coverage by oral health services are still necessary. Conclusion Although the theme includes other studies and reflections, the present work may contribute to discussions about the present condition, and it is recommended the active participation of all the actors involved in the care, in the search for the qualification of oral health services in this region.
DOI: 10.6084/m9.figshare.5980135
title: External root resorption of second molars caused by impacted third molars: an observational study in panoramic radiographs

description: Abstract Objective This research investigate the presence of external root resorption (ERR) in second molars caused by impacted third molars in panoramic radiographs, relating to the position of third molars according to classification of Winter, Pell and Gregory. Material and method A cross-sectional, retrospective study using panoramic radiographs obtained from January 2014 to December 2015. The inclusion criterion was the presence of a second molar adjacent to an impacted third molar. Data were analyzed using descriptive and inferential statistics. Pearson's Chi-Square Test and Fisher's Exact Test (p≤0.05) were performed. Result The sample consisted of 584 panoramic radiographs, 356 (60.95%) of women, and 228 (39.05%) of men, the mean age was 25.31 years. The prevalence of ERR was 12.5%, and the group of 14-24 year olds was the most affected (p = 0.46). The presence of ERR was statistically higher in the mandible (42.1%) with p=0.01. The ERR located in the cervical (57.1%) and medium (58.8%) thirds was proportionally higher in the teeth with B2 (p=0.02) and mesio-angular positions (p=0.26). Conclusion The prevalence of ERR in second molars, caused by impacted third molars, was shown to be similar to results found in the literature, with no gender preference, this affects young patients, occurring frequently in mandible teeth, and presents greater severity in the cervical and middle thirds. The B2 and mesio-angular positions were more prone to ERR.
DOI: 10.6084/m9.figshare.5979748.v1
title: Aesthetic perception of gingival smiles

description: Abstract Introduction Dentists have shown interest in learning new techniques to create more attractive smiles, but with little concern for understanding the reasons why the patient is dissatisfied. Objective To evaluate the aesthetic perception of laypersons in dentistry in comparison with general practitioner dentists and periodontists regarding the gingival smile, and to compare this aesthetic perception between the male and female genders. Methodology A photograph of a standard smile was taken and was digitally modified to create the periodontal conditions of a gingival smile from 0.5 mm to 2.5 mm. The photographs were judged by 150 individuals (25-65 years of age), 81 female and 69 male, divided into three groups: 50 laypersons, 50 general practitioners and 50 periodontists. The evaluation was performed using a visual analog scale. The statistical evaluation tests used were the Pearson Chi squared test, Student's t-test, ANOVA and Newman-keuls. Result The aesthetic perceptions among the professionals are similar, and they observe more subtle changes in the aesthetics of the smile than the laypersons observe. The general practitioners and periodontists were similarly sensitive to changes generated in the gingival smile when these reached 1.5 mm, while laypersons only perceived them when these changes reached 2.5 mm. There was no significant difference in the aesthetic perception of male and female evaluators in any of the groups. Conclusion The aesthetic perception of the gingival smile between general practitioner dentists and periodontists was similar, and dental professionals were more demanding than the layperson. There was no difference between female and male aesthetic perceptions.
DOI: 10.6084/m9.figshare.5979754
title: Development of dentin caries lesions in an in vitro simplified biofilm model: a pilot study

description: Abstract Introduction Oral laboratory biofilm models have been developed to reproduce the oral environment and the process of caries lesion formation in vitro. Objective To establish and standardize an in vitro biofilm model for the development of caries lesions in dentin. Material and method Twelve standardized bovine dentin discs were assigned into three experimental times: 4, 7, and 10 days. Samples of each experimental period were inoculated with Streptococcus mutans UA 159 in a BHI culture medium with 1% sucrose, and cultured under anaerobic conditions. The integrated hardness loss (ΔS) of dentin discs and the hardness of the substrate at different depths were considered as response variables. The ΔS data were analysed by ANOVA followed by Tukey's test, both with significance level of 5%, and the data of hardness at different depths were analysed descriptively. Result There was a higher hardness loss after 10 days of microbial growth when compared to 4 days (p = 0.034), however, there was no difference between 7 and 10 days (p = 0.853). The 4-day group showed loss of hardness of the surface layers (10-40μm) and the 10-day group showed demineralization in the deeper area around 150µm. Conclusion The proposed model was able to develop artificial caries lesions in dentin. In 7 days, the dentin sub superficial lesions were suitable to des-remineralisation studies.
DOI: 10.6084/m9.figshare.5979754.v1
title: Development of dentin caries lesions in an in vitro simplified biofilm model: a pilot study

description: Abstract Introduction Oral laboratory biofilm models have been developed to reproduce the oral environment and the process of caries lesion formation in vitro. Objective To establish and standardize an in vitro biofilm model for the development of caries lesions in dentin. Material and method Twelve standardized bovine dentin discs were assigned into three experimental times: 4, 7, and 10 days. Samples of each experimental period were inoculated with Streptococcus mutans UA 159 in a BHI culture medium with 1% sucrose, and cultured under anaerobic conditions. The integrated hardness loss (ΔS) of dentin discs and the hardness of the substrate at different depths were considered as response variables. The ΔS data were analysed by ANOVA followed by Tukey's test, both with significance level of 5%, and the data of hardness at different depths were analysed descriptively. Result There was a higher hardness loss after 10 days of microbial growth when compared to 4 days (p = 0.034), however, there was no difference between 7 and 10 days (p = 0.853). The 4-day group showed loss of hardness of the surface layers (10-40μm) and the 10-day group showed demineralization in the deeper area around 150µm. Conclusion The proposed model was able to develop artificial caries lesions in dentin. In 7 days, the dentin sub superficial lesions were suitable to des-remineralisation studies.
DOI: 10.6084/m9.figshare.14326879.v1
title: Design and installation alternatives of Venturi injectors in drip irrigation

description: The performance and installation alternatives of four Venturi injector prototypes were studied at Universitat Politècnica de València, Valencia, Spain (39°29' N; 0°23' W; 20 m). This device performance was studied under several parameters such as head loss, relation of flows and injection efficiency. The installation configurations analyzed were: without the injection of nutrients solution and with the injection either having negative or positive pressure at the Venturi throat. The inlet pressures were established between 10 and 40 m.w.c. The experimental data has been processed using multiple stepwise regression techniques and analysis of variance (ANOVA). Moreover, geometry integration versus diameters, flows and pressures is used to obtain some equations for predicting the head loss and injected flow. The results of the present study showed that the relation between flows and injection efficiency were better when the diameter of inlet nutrient line increases and become worse when decreases the diameter of the Venturi throat. Accordingly, these dimensions become very important in the design prototype and installation configuration. Furthermore, after the analysis of laboratory experiments it can be concluded that head losses, at the same injected flow, were lower if the injection was carried out with positive pressures at the throat than in the case of negative pressures. Also in this case, the relationship between flow rates and injection efficiency leaded to a good performance of the proposed installation.
DOI: 10.6084/m9.figshare.6273209
title: Effect of storage temperature on Streptococcus mutans viability

description: Abstract Introduction Proper storage conditions and maintenance of viable biological material plays an important role in microbiological research, allowing for the opportunity to conduct future studies. Objective To evaluate the viability of Streptococcus mutans strains that were previously grown and stored under different temperatures for approximately eight years. Material and method In this study, we evaluated 393 bacterial isolates that were stored in a freezer at -80°C (G1) and 200 isolates stored in a freezer at -20°C (G2). Aliquots of each sample were plated on blood agar and mitis-salivarius bacitracin sucrose agar-solidified medium. After incubating under microaerophilic conditions in an incubator at 37°C for 72 hours, the presence, morphology and purity of bacterial growth was observed. The data were analyzed by means of descriptive statistics. Result Microbial viability was observed in almost all samples (99.7%) in G1, whereas all isolates stored at -20°C were considered inviable. Conclusion The viability of S. mutans is influenced by the storage temperature of the samples, and the strains remain viable when stored under ideal temperature conditions (-80°C), even when stored for a long period of time.
DOI: 10.6084/m9.figshare.6273209.v1
title: Effect of storage temperature on Streptococcus mutans viability

description: Abstract Introduction Proper storage conditions and maintenance of viable biological material plays an important role in microbiological research, allowing for the opportunity to conduct future studies. Objective To evaluate the viability of Streptococcus mutans strains that were previously grown and stored under different temperatures for approximately eight years. Material and method In this study, we evaluated 393 bacterial isolates that were stored in a freezer at -80°C (G1) and 200 isolates stored in a freezer at -20°C (G2). Aliquots of each sample were plated on blood agar and mitis-salivarius bacitracin sucrose agar-solidified medium. After incubating under microaerophilic conditions in an incubator at 37°C for 72 hours, the presence, morphology and purity of bacterial growth was observed. The data were analyzed by means of descriptive statistics. Result Microbial viability was observed in almost all samples (99.7%) in G1, whereas all isolates stored at -20°C were considered inviable. Conclusion The viability of S. mutans is influenced by the storage temperature of the samples, and the strains remain viable when stored under ideal temperature conditions (-80°C), even when stored for a long period of time.
DOI: 10.6084/m9.figshare.14326585.v1
title: Structure of the Scientific Theories

description: A scientific theory consists of a symbolic framework containing laws and concepts that are derived by deductive reasoning from fundamental laws and primitive concepts, and complemented by the correspondence or the relation between the symbolic concepts and the real objects. The symbolic framework is understood as a representation of the real, constructed by our minds like a realistic painting. In accordance with this point of view, scientific laws are not discovered but conceived or created by our minds. We show how this approach is organized by rational thinking, which is understood as an innate ability of the mind that emerges between childhood and adolescence. We also examine with some detail the structure of the past scientific theories, pointing out their postulates, or fundamental laws, and the primitive concepts. We will restrict ourselves to some of the physical theories, starting with those that emerged in the Hellenistic period, and then proceed to examine other theories until the end of the seventeenth century.
DOI: 10.6084/m9.figshare.6272687
title: Lexical analysis of the Code of Dental Ethics

description: Abstract Introduction The Code of Dental Ethics (CDE), Resolution CFO-118 of May 2012, is a document that advocates the ethical performance of professionals registered in the Federal Council of Dentistry with the intention of orientation, reflection and standardization of professional practice. Objective To analyze the content of the current CEO in order to identify relevant aspects addressed in this document. Material and method A documentary research, descriptive of the 2012 CDE was carried out. The textual contents of the articles, paragraphs and subsections of CFO-118/2012 Resolution were processed by the IRAMUTEQ software and analyzed by Descending Hierarchical Classification (CHD), Similitude Analysis and Word Cloud. Result In the quanti-qualitative analysis of the textual corpus, 5,340 word were observed, with a mean of 89.0 words per CEO article. Of the total, 1,417 distinct words were found and 1,073 of these, which presented an average of more than 3.1 occurrences per article, were included by the software in CHD. This classification resulted in six classes: “Health Team”, “Professional-Patient Relationship”, “Fences”, “Advertising and Marketing”, “Normative Set” and “Services”, the latter being the most prevalent (20, 1%), and characterized by the words: treatment (χ2 = 35.6), cost (χ2 = 16.5) and work (χ2 = 16.1). From the six classes, three major branches were identified: professional (29.2%), care (39.3%) and advertising and marketing (31.5%). Conclusion The lexical analysis demonstrated the valorization of the service rendering, the prioritization of the profession care sector and the virtues related to the professional according to analysis of the CDE of 2012.
DOI: 10.6084/m9.figshare.5979748
title: Aesthetic perception of gingival smiles

description: Abstract Introduction Dentists have shown interest in learning new techniques to create more attractive smiles, but with little concern for understanding the reasons why the patient is dissatisfied. Objective To evaluate the aesthetic perception of laypersons in dentistry in comparison with general practitioner dentists and periodontists regarding the gingival smile, and to compare this aesthetic perception between the male and female genders. Methodology A photograph of a standard smile was taken and was digitally modified to create the periodontal conditions of a gingival smile from 0.5 mm to 2.5 mm. The photographs were judged by 150 individuals (25-65 years of age), 81 female and 69 male, divided into three groups: 50 laypersons, 50 general practitioners and 50 periodontists. The evaluation was performed using a visual analog scale. The statistical evaluation tests used were the Pearson Chi squared test, Student's t-test, ANOVA and Newman-keuls. Result The aesthetic perceptions among the professionals are similar, and they observe more subtle changes in the aesthetics of the smile than the laypersons observe. The general practitioners and periodontists were similarly sensitive to changes generated in the gingival smile when these reached 1.5 mm, while laypersons only perceived them when these changes reached 2.5 mm. There was no significant difference in the aesthetic perception of male and female evaluators in any of the groups. Conclusion The aesthetic perception of the gingival smile between general practitioner dentists and periodontists was similar, and dental professionals were more demanding than the layperson. There was no difference between female and male aesthetic perceptions.
DOI: 10.6084/m9.figshare.6272936
title: Prevalence evaluation and classification of bifid mandibular canals in CBCT exams in different facial types

description: Abstract Objetive The aim of this study is to establish the prevalence and classification of mandibular canal alterations using cone beam computed tomography (CBCT) in different facial types. This research was submitted and approved by the research ethics committee, registration number 2.065.839. Material and method The sample consisted of 90 CBCTs from the São Leopoldo Mandic Dental School database (Campinas-SP), divided into three groups according to brachycephalic, dolichocephalic and mesocephalic facial types. Result Of the 90 patients, 23 presented bifid mandible canals (25.6%), of which 60.9% were in males and 39.1% in females. In 39.1%, the canal bifurcation occurred towards the retromolar region (class D), 21.7% had a trajectory to an alveolar or upper direction (class C) and 13.1% were classified as C-E. For the remaining classifications (A, E, F and A-E), the frequencies were in the range of 8.7% to 4.3%. None of the 23 cases of mandibular canal bifurcation was classified as B (mesial direction). Conclusion According to the results obtained from this study, the prevalence of bifid mandibular canals was found to be 25.6%, with class D being the most prevalent for the retromolar region and the highest occurrence was unilaterally on the left side. When evaluating the occurrence of bifid mandibular canals in relation to facial types, brachycephalic patients were the most affected.
DOI: 10.6084/m9.figshare.6272936.v1
title: Prevalence evaluation and classification of bifid mandibular canals in CBCT exams in different facial types

description: Abstract Objetive The aim of this study is to establish the prevalence and classification of mandibular canal alterations using cone beam computed tomography (CBCT) in different facial types. This research was submitted and approved by the research ethics committee, registration number 2.065.839. Material and method The sample consisted of 90 CBCTs from the São Leopoldo Mandic Dental School database (Campinas-SP), divided into three groups according to brachycephalic, dolichocephalic and mesocephalic facial types. Result Of the 90 patients, 23 presented bifid mandible canals (25.6%), of which 60.9% were in males and 39.1% in females. In 39.1%, the canal bifurcation occurred towards the retromolar region (class D), 21.7% had a trajectory to an alveolar or upper direction (class C) and 13.1% were classified as C-E. For the remaining classifications (A, E, F and A-E), the frequencies were in the range of 8.7% to 4.3%. None of the 23 cases of mandibular canal bifurcation was classified as B (mesial direction). Conclusion According to the results obtained from this study, the prevalence of bifid mandibular canals was found to be 25.6%, with class D being the most prevalent for the retromolar region and the highest occurrence was unilaterally on the left side. When evaluating the occurrence of bifid mandibular canals in relation to facial types, brachycephalic patients were the most affected.
DOI: 10.6084/m9.figshare.6272687.v1
title: Lexical analysis of the Code of Dental Ethics

description: Abstract Introduction The Code of Dental Ethics (CDE), Resolution CFO-118 of May 2012, is a document that advocates the ethical performance of professionals registered in the Federal Council of Dentistry with the intention of orientation, reflection and standardization of professional practice. Objective To analyze the content of the current CEO in order to identify relevant aspects addressed in this document. Material and method A documentary research, descriptive of the 2012 CDE was carried out. The textual contents of the articles, paragraphs and subsections of CFO-118/2012 Resolution were processed by the IRAMUTEQ software and analyzed by Descending Hierarchical Classification (CHD), Similitude Analysis and Word Cloud. Result In the quanti-qualitative analysis of the textual corpus, 5,340 word were observed, with a mean of 89.0 words per CEO article. Of the total, 1,417 distinct words were found and 1,073 of these, which presented an average of more than 3.1 occurrences per article, were included by the software in CHD. This classification resulted in six classes: “Health Team”, “Professional-Patient Relationship”, “Fences”, “Advertising and Marketing”, “Normative Set” and “Services”, the latter being the most prevalent (20, 1%), and characterized by the words: treatment (χ2 = 35.6), cost (χ2 = 16.5) and work (χ2 = 16.1). From the six classes, three major branches were identified: professional (29.2%), care (39.3%) and advertising and marketing (31.5%). Conclusion The lexical analysis demonstrated the valorization of the service rendering, the prioritization of the profession care sector and the virtues related to the professional according to analysis of the CDE of 2012.
DOI: 10.6084/m9.figshare.6273179
title: Perception of dentists, dental students, and patients on dentogingival aesthetics

description: Abstract Introduction Patients’ demand for dentogingival aesthetics has increased significantly in recent years, and this is a complex concept due to numerous factors involved in obtaining patient/professional satisfaction. Some dentogingival features may alter smile harmony, such as excessive gingival display. Objective To evaluate whether the presence of gingival display has a negative influence on the perception of dentogingival aesthetics. Material and method 180 individuals (60 dentists, 60 dental students, and 60 patients) evaluated images of volunteer smiles. These images were digitally altered by the Adobe Photoshop™ software, creating different situations of gingival display (4 mm, 2 mm, 0 mm, -2 mm, -4 mm), and graded by the evaluators with the following scores: (01) very pleasant smile, (02) pleasant smile, and 03) unpleasant smile. The scores assigned were analyzed using ANOVA (α=0.05). Result Gingival displays between 0 and 2 mm were considered aesthetically pleasing. Changes of -4 and +4 mm were defined as the most disharmonious smiles. The 0-mm female smile was considered the most harmonious for dentists (1.51) and dental students (1.77), by Student's t test (p&lt;0.05). In the opinion of patients, the smile of +2 mm was considered the most aesthetic. In the image evaluations of men, the 0-mm smile was considered the most aesthetic (p &lt;0.05) for dentists (1.85) and dental students (1.62). The patients considered +2 mm of gingival display the most harmonious smile. Conclusion The aesthetic perception of dental students and dentists was different when compared to the group of patients.