Brazilian Oral Research最新文献_第3页

Application of polyetheretherketone (PEEK) posts: evaluation of fracture resistance and stress distribution in the root: in vitro and finite element analyses. 聚醚醚酮(PEEK)桩的应用:根部抗断裂性和应力分布的评估:体外和有限元分析。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0047

Michele Oliveira Lima, Marcela Alvarez Ferretti, Ricardo Armini Caldas, Valentim Adelino Ricardo Barão, Fabiana Mantovani Gomes França, Débora Alves Nunes Leite Lima, Luís Roberto Martins, Flávio Henrique Baggio Aguiar

{"title":"Application of polyetheretherketone (PEEK) posts: evaluation of fracture resistance and stress distribution in the root: in vitro and finite element analyses.","authors":"Michele Oliveira Lima, Marcela Alvarez Ferretti, Ricardo Armini Caldas, Valentim Adelino Ricardo Barão, Fabiana Mantovani Gomes França, Débora Alves Nunes Leite Lima, Luís Roberto Martins, Flávio Henrique Baggio Aguiar","doi":"10.1590/1807-3107bor-2023.vol37.0047","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0047","url":null,"abstract":"To evaluate the feasibility of using a milled polyetheretherketone (PEEK) post and core in endodontically treated teeth with or without a ferrule. Sixty bovine tooth roots were endodontically treated followed by cementation of intraradicular retainers (IR), according to each experimental group: a) non-ferrule glass fiber post (f0FP); b) 2-mm-ferrule glass fiber post (f2FP); c) non-ferrule resized glass fiber post (f0PR); d) 2-mm-ferrule resized glass fiber post (f2PR); e) non-ferrule PEEK post and core (f0PPC); and f) 2-mm-ferrule PEEK post and core (f2PPC). Metal crowns were made and cemented. A periodontal ligament was simulated using polyether. A force was applied to the palatine portion of each sample at 45°, until fracture. Fracture resistance data were submitted to two-way ANOVA and Tukey's test (α = 0.05). Three-dimensional digital models were developed to calculate the tensions formed in the root using finite element analysis. Models of glass fiber posts and PEEK posts and cores were evaluated with or without a ferrule. The results were analyzed by the Mohr-Coulomb criterion. The type of IR was not influenced by fracture strength (p = 0.243). There were significant statistical differences among the remaining factors. Ferrule groups had greater fracture resistance, and the failure mode of teeth with a ferrule was more catastrophic than the non-ferrule group. A ferrule increases fracture resistance and influences failure mode; the PEEK post and core did not modify the biomechanics of endodontically treated teeth, and resembled the glass fiber post results. The crack initiation point differed between the ferrule and non-ferrule groups.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e047"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9908025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Influence of bioceramic intracanal medication on the bond strength of bioceramic root canal sealer. 生物陶瓷根管内用药对生物陶瓷根管密封器粘结强度的影响。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0056

Patrícia Maria Escobar, Alice Corrêa Silva-Sousa, Rafael Verardino de Camargo, Marco Simões-Carvalho, Yara Teresinha Silva-Sousa, Jardel Francisco Mazzi-Chaves, Gustavo DE-Deus, Manoel Damião Sousa-Neto

{"title":"Influence of bioceramic intracanal medication on the bond strength of bioceramic root canal sealer.","authors":"Patrícia Maria Escobar, Alice Corrêa Silva-Sousa, Rafael Verardino de Camargo, Marco Simões-Carvalho, Yara Teresinha Silva-Sousa, Jardel Francisco Mazzi-Chaves, Gustavo DE-Deus, Manoel Damião Sousa-Neto","doi":"10.1590/1807-3107bor-2023.vol37.0056","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0056","url":null,"abstract":"To investigate the influence of the remaining volume of a new intracanal medication based on bioceramic compounds on the bond strength (BS) and formation of an adhesive interface between calcium silicate-based and epoxy resin-based root canal sealers. For this purpose, the specimens were distributed according to the intracanal medication (n = 26): Bio-C Temp (BCT) and Ultracal XS (UXS). The roots were scanned in microCT, and after 7 days, the medication was removed. Then a new scan was performed to evaluate the volume of medication remaining. Subsequently, 40 specimens were redistributed into 2 subgroups (n = 10) and filled according to the sealer used: AH Plus (AHP) and Bio-C Sealer (BCS), to assess the bond strength by using the push-out test, and the adhesive interface by confocal laser fluorescence microscopy (CLSM) and scanning electron microscopy (SEM). The t test showed a smaller remainder of BCT (1.77 ± 0.86) compared with UXS (10.47 ± 5.78), irrespective of the root third evaluated. The BS showed that teeth with BCT + BCS had higher bond strength values (3.70 ± 1.22) when compared to the other groups: BCT + AHP (2.15 ± 1.07), UXS + BCS (3.18 ± 1.09) and UXS + AHP (2.11 ± 1.02) (p<0.001). The cervical third had higher BS when compared with the middle and apical thirds (p < 0.001), and higher number of adhesive failures. The adhesive interface in SEM and CLSM images showed better adaptation for the association between BCT + BCS. Intracanal medication and silicate-based endodontic sealer appeared to interact chemically by forming a biomineralizing layer, allowing for an increase in the bond strength and forming an adhesive interface between the materials, with no or less gap formation.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e056"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9908027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Oral health policies and decision-making process in Brazil, Colombia and Chile. 巴西、哥伦比亚和智利的口腔卫生政策和决策过程。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0051

Mariana Lopes Galante, Marco Antonio Cornejo-Ovalle, Gabriel Jaime Otálvaro-Castro, Daniel Felipe Patiño-Lugo, Nicole Pischel, Amanda Iida Giraldes, Fernanda Campos de Almeida Carrer

{"title":"Oral health policies and decision-making process in Brazil, Colombia and Chile.","authors":"Mariana Lopes Galante, Marco Antonio Cornejo-Ovalle, Gabriel Jaime Otálvaro-Castro, Daniel Felipe Patiño-Lugo, Nicole Pischel, Amanda Iida Giraldes, Fernanda Campos de Almeida Carrer","doi":"10.1590/1807-3107bor-2023.vol37.0051","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0051","url":null,"abstract":"Public health policies are crucial for the well-being of the general population; however, the health systems of developed countries still do not include oral health in its system. Thus, it is necessary to understand the process of decision-making in oral health policies to create opportunities for countries to achieve an overall positive health outcome, including oral health. This study aimed to identify the factors influencing the inclusion of oral health on the political agenda in Brazil, Colombia, and Chile. The study sample involved decision-makers at political, technical, and academic levels. The extracted data were analyzed using the software Maxqda® and Kingdon´s theoretical model; defining interactive variables that produce a \"window of opportunity\" to define the agenda and the insertion of theme in formulating public policies. The decision-making process regarding oral health is influenced by many factors like the need to improve the overall oral health of the population, identified through national epidemiological studies, and the importance of individuals in positions involving political decision-making, who advocate for oral health. Strategies were developed in partnership with the academy that focused on the health rights of the population provided by law; territorial and national programs were also developed. The inclusion and creation of oral health policies depend on actors who advocate for thematic and scientific evidence to support decision-making. A close relationship between academia and stakeholders and knowledge translation is important for the development of public policies that can be effective for health systems.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e051"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9923776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of bioactive particles and onium salt on the physicochemical properties of experimental infiltrants. 生物活性颗粒和铵盐对实验渗透物理化性质的影响。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0088

Caroline Mathias, Rafael Soares Gomes, Carmem Silvia Pfeifer, Priscila Regis Pedreira, Janaina Emanuela Damasceno, Giselle Maria Marchi

{"title":"Influence of bioactive particles and onium salt on the physicochemical properties of experimental infiltrants.","authors":"Caroline Mathias, Rafael Soares Gomes, Carmem Silvia Pfeifer, Priscila Regis Pedreira, Janaina Emanuela Damasceno, Giselle Maria Marchi","doi":"10.1590/1807-3107bor-2023.vol37.0088","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0088","url":null,"abstract":"This study evaluated physicochemical properties of experimental infiltrants after addition of hydroxyapatite nanoparticles (HAp) or 58S bioactive glass (BAG) and diphenyliodonium hexafluorophosphate (DPI). The resin matrix was composed of TEGDMA/Bis-EMA (3:1), 0.5 mol% CQ, and 1 mol% EDAB. The blends received or not 0.5 mol% DPI and 10% wt BAG or HAp. Icon was used as commercial control. The groups were characterized by XRD, FT-IR spectrometry, and SEM before and after simulated body fluid (SBF) immersion for up to 7 days. Polymerization kinetics (n =3 ), water sorption and solubility (n=10), and viscosity (n = 3) were surveyed. For polymerization kinetics, the samples were polymerized for 5 min and the data were obtained from 40 s and 5 min. Statistical analysis was made using ANOVA and Tukey's test (a = 0.05). After 7 days of SBF immersion, XRD and FT-IR showed that the HAp crystalline phase was present only in the HAp groups. A lower degree of conversion (DC) and polymerization rate were observed for the Icon and BAG groups, whereas HAp showed higher values. For the BAG group, DPI increased polymerization rate and DC in 40 s. After 5 min, all groups presented DC above 80%. In groups with particles, the HAp groups exhibited higher viscosity, whereas DPI groups showed a decrease in viscosity. Icon had the highest water sorption. To conclude, BAG neither improved the physicochemical properties studied, nor did it show bioactive properties. The addition of DPI reduced viscosity caused by particle addition and also attenuated the DC decrease caused by BAG addition. The addition of bioactive particles to infiltrants should be seen with caution because they increase viscosity and may not bring major clinical improvements that justify their use. DPI might be indicated only if any component is added to the infiltrant to act as a compensation mechanism.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e088"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10180826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of trabecular bone changes according to the type of prosthesis in patients using bisphosphonates: a retrospective study. 根据使用双膦酸盐的患者假体类型评估骨小梁的变化:一项回顾性研究。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0089

Begüm Ünlü Kurşun, Ender Akan

{"title":"Evaluation of trabecular bone changes according to the type of prosthesis in patients using bisphosphonates: a retrospective study.","authors":"Begüm Ünlü Kurşun, Ender Akan","doi":"10.1590/1807-3107bor-2023.vol37.0089","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0089","url":null,"abstract":"The objective of the study was to retrospectively compare the fractal size values calculated in the trabecular bone according to the type of complete removable denture, removable partial denture, and partial fixed prosthesis between patients using bisphosphonates and healthy patients, retrospectively. Panoramic radiographs of a total of 200 patients, (100 using bisphosphonates,100 control group), were taken from the right and left molar regions before and after treatment with 72 × 72 pixels. The fractal dimension (FD) was computed by using ImageJ Software using the box-counting method on the images obtained. There was an interaction effect between the trabecular bone change-patient group-the type of prosthesis used and the parameters of the area (p < 0.05). In patients using complete removable dentures and removable partial dentures in the maxilla and mandibula in the molar region, a greater decrease in FD values was observed in the control group than in the patient group using bisphosphonates. An increase in FD values over time was observed in the patient group using bisphosphonates with partial fixed maxillary and mandibular prostheses compared to the control group. Partial fixed prostheses should be preferred primarily instead of complete removable or removable partial dentures in patients using bisphosphonates to prevent osteonecrosis due to dental trauma.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e089"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10182663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Conventional versus flap-protected free gingival graft: a multicenter randomized clinical trial. 传统与皮瓣保护游离牙龈移植:一项多中心随机临床试验。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0001

Vanessa Camillo de Almeida, Claudio Mendes Pannuti, Marcelo Sirolli Ferreira, Rafael de Oliveira Lazarin, Giuseppe Alexandre Romito, Ronald Ernst Jung, Dimitris Nikolaos Tatakis, Cleverson de Oliveira E Silva, João Batista Cesar Neto

{"title":"Conventional versus flap-protected free gingival graft: a multicenter randomized clinical trial.","authors":"Vanessa Camillo de Almeida, Claudio Mendes Pannuti, Marcelo Sirolli Ferreira, Rafael de Oliveira Lazarin, Giuseppe Alexandre Romito, Ronald Ernst Jung, Dimitris Nikolaos Tatakis, Cleverson de Oliveira E Silva, João Batista Cesar Neto","doi":"10.1590/1807-3107bor-2023.vol37.0001","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0001","url":null,"abstract":"The purpose of this study was to compare the outcomes of a modified gingival graft technique, in which the released flap is positioned and sutured over the graft, with the conventional free gingival graft (FGG) procedure, when both are used for gingival augmentation. A 12-month, multicenter parallel randomized controlled trial was conducted. Subjects with buccal RT2 gingival recessions and keratinized tissue width (KTW) < 2 mm in at least one mandibular incisor were randomized to control group (n = 20; conventional FGG) or test group (n = 20; modified FGG; flap sutured over FGG using sling sutures). The primary outcome (KTW) was measured at baseline and after 3, 6 and 12 months, as was keratinized tissue thickness (KTT). Postoperative pain (POP) and analgesic intake were also recorded. Both techniques promoted a significant increase in KTW and KTT when compared to baseline (p < 0.05) with no significant differences between groups (KTW change of 6.1±1.5 mm and 5.4±1.6 mm, for control and test, respectively; p=0.16). However, test group patients reported less POP after 7 days and used less analgesic medication than control group patients (p < 0.05). We concluded that the modified FGG was comparable to conventional FGG in augmenting keratinized tissue width and thickness at mandibular incisors, but resulted in less patient morbidity.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e001"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9088247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IL17A and IL17RA gene polymorphisms in Fanconi anemia. 范可尼贫血中IL17A和IL17RA基因多态性。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0012

Rafael Zancan Mobile, Monalisa Castilho Mendes, Cleber Machado-Souza, Priscila de Mattos Queiroz, Carmem Maria Sales Bonfim, Cassius Carvalho Torres-Pereira, Juliana Lucena Schussel

{"title":"IL17A and IL17RA gene polymorphisms in Fanconi anemia.","authors":"Rafael Zancan Mobile, Monalisa Castilho Mendes, Cleber Machado-Souza, Priscila de Mattos Queiroz, Carmem Maria Sales Bonfim, Cassius Carvalho Torres-Pereira, Juliana Lucena Schussel","doi":"10.1590/1807-3107bor-2023.vol37.0012","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0012","url":null,"abstract":"Fanconi anemia is a rare autosomal recessive disease. In this disease, cytokine pathways can induce the bone marrow failure that is observed in individuals with Fanconi anemia. Interleukin IL-17 exhibits a protective effect in organisms because it induces neutrophil recruitment and shows a pathological role in several models of autoimmune diseases, periodontal disease, cancer, allograft rejection, and graft versus host disease. Polymorphisms in the IL17A and IL17RA genes were evaluated from DNA in saliva, comparing individuals with or without Fanconi anemia, using models of genotypic transmission (additive, dominant, and recessive). Polymorphisms in the IL17A and IL17RA genes (rs2241044 [C allele], rs879577 [C allele], rs9606615 [T allele], and rs2241043 [C allele]) were risk factors for developing Fanconi anemia. We also performed an analysis of gene markers with clinical variables in the Fanconi group. Polymorphisms in the IL17A gene (rs3819025 [A allele] and rs2275913 [G allele], respectively) were associated with an age of less than 20 years (p = 0.026; RP 0.65) and the female sex (p = 0.043; RP 0.88). The IL17RA gene was also associated with age and the presence of leukoplakia (a potentially malignant oral disorder). An age of less than 20 years was associated with rs917864 (T allele; p = 0.036; RP 0.67). The presence of leukoplakia was associated with rs17606615 (T allele; p = 0.042; RP 0.47). To our knowledge, this is the first study that associates IL17A and IL17RA gene polymorphisms with Fanconi anemia and examines rs2241044 polymorphisms in scientific literature thus far.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e012"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10798442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of a modified implant macrogeometry on biomechanical parameters and bone-related markers in rats. 改良种植体宏观几何形状对大鼠生物力学参数和骨相关标志物的影响。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0044

Mounir Colares Mussi, Fernanda Vieira Ribeiro, Monica Grazieli Corrêa, Cristiane Ribeiro Salmon, Suzana Peres Pimentel, Fabiano Ribeiro Cirano, Marcio Zaffalon Casati

{"title":"Impact of a modified implant macrogeometry on biomechanical parameters and bone-related markers in rats.","authors":"Mounir Colares Mussi, Fernanda Vieira Ribeiro, Monica Grazieli Corrêa, Cristiane Ribeiro Salmon, Suzana Peres Pimentel, Fabiano Ribeiro Cirano, Marcio Zaffalon Casati","doi":"10.1590/1807-3107bor-2023.vol37.0044","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0044","url":null,"abstract":"This study investigated the impact of a modified implant macrogeometry on peri-implant healing and its effect on bone-related molecules in rats. Eighteen rats received one implant in each tibia: the control group received implants with conventional macrogeometry and the test group received implants with modified macrogeometry. After 30 days, the implants were removed for biomechanical analysis and the bone tissue around them was collected for quantifying gene expression of OPN, Runx2, β-catenin, BMP-2, Dkk1, and RANKL/OPG. Calcein and tetracycline fluorescent markers were used for analyzing newly formed bone at undecalcified sections of the tibial implants. These fluorescent markers showed continuous bone formation at cortical bone width and sparse new bone formed along the medullary implant surface in both groups. However, higher counter-torque values and upregulation of OPN expression were achieved by test implants when compared to controls. The modified macrogeometry of implants optimized peri-implant healing, favoring the modulation of OPN expression in the osseous tissue around the implants.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e44"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9757176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Susceptibility of fluorotic enamel to dental erosion-abrasion. 含氟牙釉质对牙齿侵蚀磨损的敏感性。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0068

Cristiane Araújo Maia Silva, Frederico Barbosa de Sousa, Esperanza Angeles Martinez-Mier, Adam Benjamin Kelly, George J Eckert, Anderson Takeo Hara

{"title":"Susceptibility of fluorotic enamel to dental erosion-abrasion.","authors":"Cristiane Araújo Maia Silva, Frederico Barbosa de Sousa, Esperanza Angeles Martinez-Mier, Adam Benjamin Kelly, George J Eckert, Anderson Takeo Hara","doi":"10.1590/1807-3107bor-2023.vol37.0068","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0068","url":null,"abstract":"Dental hard tissue conditions can be of pre- or post-eruptive nature, such as enamel fluorosis and erosive tooth wear (ETW), respectively. Dental enamel fluorosis is caused by the chronic and excessive intake of fluoride during enamel development, leading to increased fluoride concentration and increased porosity. ETW has become a common clinical condition and often impairs dental function and aesthetics. This in vitro study tested the hypothesis that fluorotic enamel presents different susceptibility to dental erosion-abrasion. It consisted of a 3×3×2 factorial design, considering a) fluorosis severity: sound (TF0), mild (TF1-2), moderate (TF3-4); b) abrasive challenge: low, medium, and high; and c) erosive challenge: yes or no. A total of 144 human teeth were selected according to the three fluorosis severity levels (n=48), and subdivided into six groups (n = 8) generated by the association of the different erosive and abrasive challenges. Enamel blocks (4×4 mm) were prepared from each tooth and their natural enamel surfaces subjected to an erosion-abrasion cycling model. After cycling, the depth of the lesions in enamel was assessed by profilometry. ANOVA showed that the three-way and two-way interactions among the factors were not significant (p > 0.20). Enamel fluorosis level (p=0.638) and abrasion level (p = 0.390) had no significant effect on lesion depth. Acid exposure caused significantly more enamel surface loss than water (p < 0.001). Considering the limitations of this in vitro study, fluorosis did not affect the susceptibility of enamel to dental erosion-abrasion.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e068"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9812953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

E-learning as a strategy in dentistry in the context of COVID-19: a path to follow? 2019冠状病毒病背景下的牙科电子学习策略:一条可走的道路?

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0060

Ana Carolina Marques-Medeiros, Renata Castro Martins, Leandro Napier de Souza, Ricardo Santiago Gomez, Maria Elisa de Souza E Silva, Maria Auxiliadora Parreiras Martins, Mauro Henrique Nogueira Guimarães de Abreu

{"title":"E-learning as a strategy in dentistry in the context of COVID-19: a path to follow?","authors":"Ana Carolina Marques-Medeiros, Renata Castro Martins, Leandro Napier de Souza, Ricardo Santiago Gomez, Maria Elisa de Souza E Silva, Maria Auxiliadora Parreiras Martins, Mauro Henrique Nogueira Guimarães de Abreu","doi":"10.1590/1807-3107bor-2023.vol37.0060","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0060","url":null,"abstract":"The current study aims to assess the effectiveness of e-learning in compliance with the new biosafety recommendations in dentistry in the context of COVID-19 applied to the clinical staff of a dental school in Brazil. A quasi-experimental epidemiological study was carried out by means of a structured, pre-tested online questionnaire, applied before and after an educational intervention, using an e-learning format. After data collection, statistical tests were performed. A total of 549 members of the clinical staff participated in the study in the two collection phases, with a return rate of 26.9%. After the e-learning stage, a reduction was found in the reported use of disposable gloves, protective goggles, and surgical masks. The course had no impact on the staff's knowledge concerning the proper sequence for donning PPE and showed 100% effectiveness regarding proper PPE doffing sequence. Knowledge about avoiding procedures that generate aerosols in the clinical setting was improved. Despite the low rate of return, it can be concluded that online intervention alone was ineffective in significantly improving learning about the new clinical biosafety guidelines. Therefore, the use of hybrid teaching and repetitive training is highly recommended.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e060"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9672742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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