Brazilian Oral Research最新文献_第2页

Influence of anxiety and catastrophizing on pain perception in orthodontic treatment and its association with inflammatory cytokines. 焦虑和灾难化对正畸治疗中疼痛感知的影响及其与炎症细胞因子的关系。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0010

Lucineide Lima Dos Santos, Ana Cláudia de Castro Ferreira Conti, Thais Maria Freire Fernandes, Gustavo Pompermaier Garlet, Marcio Rodrigues de Almeida, Paula Vanessa Pedron Oltramari

{"title":"Influence of anxiety and catastrophizing on pain perception in orthodontic treatment and its association with inflammatory cytokines.","authors":"Lucineide Lima Dos Santos, Ana Cláudia de Castro Ferreira Conti, Thais Maria Freire Fernandes, Gustavo Pompermaier Garlet, Marcio Rodrigues de Almeida, Paula Vanessa Pedron Oltramari","doi":"10.1590/1807-3107bor-2023.vol37.0010","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0010","url":null,"abstract":"Pain is common in orthodontic treatment, is subject to individual variation, and is associated with anxiety and stress, which can potentially become catastrophizing. The aim of the present study was to determine the variability of pain response after the insertion of orthodontic separators and to assess the association of pain levels with dental anxiety, catastrophizing, tooth sensitivity, and genetic expression of cytokines. To this end, 70 patients of both genders were divided into two equal groups according to the elastomeric separator used: G1 (Dentaurum) and G2 (Orthometric). Two separators were inserted in the mesial and distal sides of the lower right first molar. Participants were instructed to rate the level of pain at T0 (before insertion), T1 (just after insertion), and T2 (24 hours after insertion) on a visual analog scale. The gingival crevicular fluid was collected at T0 and T2. The levels of anxiety, catastrophizing, tooth sensitivity, and cytokine expression were also assessed. Statistical analysis was performed with the Fisher-Freeman-Halton, chi-squared, Spearman's correlation, and dependent and independent t tests (α=5%). Pain intensity was higher at T2 than at T1, in both groups (P<.05). An association was established (P<.05) between pain intensity at T1 and catastrophizing, and at T2 with anxiety and catastrophizing. Within-group differences in cytokine expression were found between T0 and T2. There was no correlation between cytokine expression and pain levels, anxiety, catastrophizing, and sensitivity at T2. Tooth separation produced variable pain levels, which were influenced by anxiety and catastrophizing, however, pain level was not correlated with increased cytokine expression.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e010"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9072167","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

Association between dental environment stress and sense of coherence in dental students: a cross-sectional study 牙科学生口腔环境压力与连贯感的关系:一项横断面研究

4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0111

Matheus dos Santos FERNANDEZ, Maísa CASARIN, Fernanda Ruffo ORTIZ, Francisco Wilker Mustafa Gomes MUNIZ

{"title":"Association between dental environment stress and sense of coherence in dental students: a cross-sectional study","authors":"Matheus dos Santos FERNANDEZ, Maísa CASARIN, Fernanda Ruffo ORTIZ, Francisco Wilker Mustafa Gomes MUNIZ","doi":"10.1590/1807-3107bor-2023.vol37.0111","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0111","url":null,"abstract":"The aim of this study was to explore associated variables with sense of coherence (SOC), and dental environment stress (DES) in a sample of dental students. All undergraduate (n = 474) and graduate (n = 105) dental students enrolled in the first semester of 2020 at a public university in southern Brazil were invited to participate. Data collection was performed by an online questionnaire, which included information related to sociodemographic and educational characteristics, biopsychosocial factors, aspects related to feelings experienced in the COVID-19 pandemic, and the SOC scale. The study outcome (DES) was measured by a validated tool. Linear regression analyses were performed to identify the associations between the outcome and all independent variables. A total of 408 students were included (response rate: 70.5%). The overall mean score of the DES scale was 73.95 (SD: 24.13). Students with higher SOC scores were observed to have significantly lower DES scores (βGRADUATE: -0.376; 95%: -0.482 to -0.271; βUNDERGRADUATE: -0.478; 95%:-0.658 to -0.297). Female undergraduate students (β: 11.788; 95%CI: 7.161–16.415) had higher DES scores compared with undergraduate male students. In addition, the presence of anxiety symptoms when providing dental care to patients with symptoms or suspected COVID-19 infection was associated with higher DES scores (β: 10.460; 95%CI: 5.644–15.277) among undergraduate dental students. The level of stress was higher in non-white undergraduate students than white (β: 8.912; 95%CI: 3.581–14.244). Among both undergraduate and graduate dental students, higher SOC scores were associated with lower DES.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135610634","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

Voltage-gated sodium channels gene expression in Burning Mouth Syndrome: a case-control study. 电压门控钠通道基因表达在灼口综合征:一项病例对照研究。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0005

Carina Domaneschi, Vanessa Juliana Gomes Carvalho, Bruno Munhoz Marotta, Norberto Nobuo Sugaya, Fábio Daumas Nunes, Camila de Barros Gallo

{"title":"Voltage-gated sodium channels gene expression in Burning Mouth Syndrome: a case-control study.","authors":"Carina Domaneschi, Vanessa Juliana Gomes Carvalho, Bruno Munhoz Marotta, Norberto Nobuo Sugaya, Fábio Daumas Nunes, Camila de Barros Gallo","doi":"10.1590/1807-3107bor-2023.vol37.0005","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0005","url":null,"abstract":"Burning mouth syndrome (BMS) is a condition characterized by painful symptoms of the oral mucosa, despite the absence of any clinical signs. Its etiology is unknown, and there is still no effective treatment to date. Current evidence has shown neuropathic impairment in BMS patients. Neuropathic pain can be related to the dysfunction of voltage-gated sodium channels, considering that these receptors regulate the induction of action potentials in nociceptive neurons. This study evaluated the gene expression of voltage-gated sodium channels Na v 1.7, Na v 1.8 and Na v 1.9 in these patients. The gene expressions of these channels were assessed by real time RT-PCR analysis of fresh-frozen tongue biopsies in a case-control study composed of 12 patients with BMS, and 5 healthy control patients, proportionally matched by sex and age, and analyzed using the 2^(-Delta Delta CT) method. There was no statistically significant difference between the analyzed groups, despite the increase in Na v 1.7 (fold-change = 3.13, p = 0.52) and decrease in Na v 1.9 (fold-change = 0.45, p = 0.36) gene expression in the BMS group. The Na v 1.8 gene was not expressed in any of the samples analyzed. Although the gene expression in the voltage-gated sodium channels in BMS under study seems to be comparable with that of the normal oral mucosa, the functionality of these channels in BMS has not yet been identified, thus suggesting that further research is needed to better understand these voltage-gated sodium channels.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e005"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10624461","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

Whole-exome sequencing of oral epithelial dysplasia samples reveals an association with new genes. 口腔上皮发育不良样本的全外显子组测序揭示了与新基因的关联。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0016

Daniela Adorno-Farias, Jean Nunes Dos Santos, Wilfredo González-Arriagada, Sandra Tarquinio, Rodrigo Alberto Santibáñez Palominos, Alberto Jesus Martín Martín, Ricardo Fernandez-Ramires

{"title":"Whole-exome sequencing of oral epithelial dysplasia samples reveals an association with new genes.","authors":"Daniela Adorno-Farias, Jean Nunes Dos Santos, Wilfredo González-Arriagada, Sandra Tarquinio, Rodrigo Alberto Santibáñez Palominos, Alberto Jesus Martín Martín, Ricardo Fernandez-Ramires","doi":"10.1590/1807-3107bor-2023.vol37.0016","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0016","url":null,"abstract":"The genetic basis of oral epithelial (OED) is unknown, and there is no reliable method for evaluating the risk of malignant transformation. Somatic mutations are responsible for the transformation of dysplastic mucosa to invasive cancer. In addition, these genomic variations could represent objective markers of the potential for malignant transformation. We performed whole-exome sequencing of 10 OED samples from Brazilian and Chilean patients. Using public genetic repositories, we identified 41 deleterious variants that could produce high-impact changes in the amino acid structures of 38 genes. In addition, the variants were filtered according to normal skin and Native American genome profiles. Finally, 13 genes harboring 15 variants were found to be exclusively related to OED. High-grade epithelial dysplasia samples showed a tendency to accumulate highly deleterious variants. We observed that 62% of 13 OED genes identified in our study were also found in head and neck squamous cell carcinoma. Among the shared genes, eight were not identified in oral squamous cell carcinoma. To our knowledge, we have described for the first time 13 genes that are found in OED in a Latin American population, of which five genes have already been observed in oral squamous cell carcinoma. Through this study, we identified genes that may be related to basal biological functions in OED.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e016"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10739095","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

Is self-perception of oral health associated with expectations of employability? 口腔健康的自我认知是否与就业预期有关?

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0014

Luciana Raquel D'Eramo, Noemi Emma Bordoni, Lourdes Cotelo, Marìa Belen Perez, Marìa Laura Sánchez, Pablo Andres Salgado, Eugenio Beltran-Aguilar, Aldo Fabián Squassi

{"title":"Is self-perception of oral health associated with expectations of employability?","authors":"Luciana Raquel D'Eramo, Noemi Emma Bordoni, Lourdes Cotelo, Marìa Belen Perez, Marìa Laura Sánchez, Pablo Andres Salgado, Eugenio Beltran-Aguilar, Aldo Fabián Squassi","doi":"10.1590/1807-3107bor-2023.vol37.0014","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0014","url":null,"abstract":"The aim of this study was to develop and validate a questionnaire that allows a systematic evaluation of the impact of self-perceived oral health on expectations of getting a job on adult population seeking dental care, and to describe its associations with demographic characteristics, job related, and health coverage variables. We designed a descriptive cross-sectional study including men and women aged 18 to 65 years from a population seeking dental services in a walk-in clinic. In a first stage we design and validated an instrument on a sample of 100 subjects. The questionnaire was registered in a Likert scale, with higher scores represented higher impact of the oral status self-perception on employability. We calculated internal consistency, construct validity, and domains validation. The final instrument consisted in an 18-item questionnaire (Cronbach α = 0.814), grouped into two domains based on exploratory and confirmatory factor analysis. The total variance explained with values >1 was 66 percent, grouping questions into six components. One domain refers to oral health status and importance of dental aesthetics, while the other refers to specific job-seeking elements. In a second stage we applied the questionnaire on 800 participants from the same population of reference. Women, people who intended to change jobs, those younger than 40 years old, having health insurance, and higher educational level showed statistically significant higher scores than their counterparts (p<0.001). We developed a tool that enables evaluating the impact of self-perceived oral health on expectations of getting a job for adults seeking emergency care in a dental clinic.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e014"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10754719","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

The impact of the COVID-19 pandemic in Brazil: a study in tertiary dental care. COVID-19大流行对巴西的影响:一项关于三级牙科保健的研究。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0025

João Mykael Alves Xavier, Ramon Targino Firmino, Igor Figueiredo Pereira, Myllena Alves Xavier, Mário César Furtado da Costa, Renata de Souza Coelho Soares, Ana Isabella Arruda Meira Ribeiro

{"title":"The impact of the COVID-19 pandemic in Brazil: a study in tertiary dental care.","authors":"João Mykael Alves Xavier, Ramon Targino Firmino, Igor Figueiredo Pereira, Myllena Alves Xavier, Mário César Furtado da Costa, Renata de Souza Coelho Soares, Ana Isabella Arruda Meira Ribeiro","doi":"10.1590/1807-3107bor-2023.vol37.0025","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0025","url":null,"abstract":"The pandemic caused by coronavirus has resonated throughout different levels of health care in Brazil and, in this context, the present research aimed to evaluate this impact on tertiary dental care provided by the Unified Health System (SUS). Therefore, an ecological study was conducted with data obtained from the Hospital Information System processed by the Portal of the Department of Informatics of SUS. The sample consisted of patients of all sexes and age groups, whose Hospital Admission Authorizations (AIHs) were approved for dental tertiary care procedures from January 2015 to December 2020. Descriptive analyses and the ANOVA test with a significance level set at p < 0.05 were used. When the annual mean numbers of AIHs approved were evaluated, findings showed that on an average, the Southeast region authorized a higher number of procedures (p-value < 0.001), however, in the pandemic year (2020), a reduction of approximately 24.5% of these hospitalizations occurred throughout Brazil, with the Midwest being the region most affected (32.12%). A percentage increase occurred in the Surgical Treatment of Oral sinus/Oral nasal Fistula (16.1%), in addition to a significant decrease in performing procedures for Resection of Mouth Lesion (33.4%). In the pandemic year, there was a reduction of 14% in expenditures related to hospital services and 23.26% related to professional services. It was concluded that the data presented demonstrated a significant reduction in AIHs for tertiary dental care in the pandemic year.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"025"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9257115","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

Longitudinal assessment of dental erosion-abrasion by cross-polarization optical coherence tomography in vitro. 交叉偏振光学相干断层扫描对牙体侵蚀磨损的纵向评价。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0081

Maria Jacinta Rosario Romero, Sávio José Cardoso Bezerra, Daniel Fried, Frank Lippert, George Joseph Eckert, Anderson Takeo Hara

{"title":"Longitudinal assessment of dental erosion-abrasion by cross-polarization optical coherence tomography in vitro.","authors":"Maria Jacinta Rosario Romero, Sávio José Cardoso Bezerra, Daniel Fried, Frank Lippert, George Joseph Eckert, Anderson Takeo Hara","doi":"10.1590/1807-3107bor-2023.vol37.0081","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0081","url":null,"abstract":"This study tested a novel in vitro dental erosion-abrasion model and the performance of cross-polarization optical coherence tomography (CP-OCT) in longitudinally monitoring the simulated lesions. Thirty human enamel specimens were prepared and randomized to receive three dental erosion-abrasion (EA) protocols: severe (s-EA, lemon juice/pH:2.5/4.25%w/v citric acid), moderate (m-EA, grapefruit juice/pH:3.5/1.03%w/v citric acid) and no-EA (water, control). EA challenge was performed by exposing the specimens to acidic solutions 4x/day and to brushing 2x/day with 1:3 fluoridated toothpaste slurry, for 14 days. Enamel thickness measurements were obtained using CP-OCT at baseline (D0), 7 (D7) and 14 days (D14) and micro-computed tomography (micro-CT) at D14. Enamel surface loss was measured with both CP-OCT and optical profilometry at D0, D7 and D14. Data was analyzed with repeated-measures ANOVA and Pearson's correlation (r) (α = 0.05). CP-OCT enamel thickness decreased over time in the s-EA group (D0 >D7 > D14, p < 0.001) and m-EA group (D0 > D14, p = 0.019) but did not change in the no-EA group (p = 0.30). Overall, CP-OCT and micro-CT results at D14 correlated moderately (r = 0.73). CP-OCT surface loss was highest for s-EA (p <0.001) but did not differ between moderate and no-EA (p = 0.25). Enamel surface loss with profilometry increased with severity (no-EA>m-EA>s-EA, p < 0.001). D14 surface loss was higher than D7 for both methods except for the no-EA group with profilometry. CP-OCT and profilometry had moderate overall correlation (r = 0.70). Our results revealed that the currently proposed in vitro dental erosion-abrasion model is valid and could simulate lesions of different severities over time. CP-OCT was a suitable method for monitoring the EA lesions.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e081"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10180828","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

Microbiological analysis of bacterial sealing of internal conical implants with different taper angles. 不同锥度内种植体细菌密封的微生物学分析。

IF 2.5 4区医学

Brazilian Oral Research Pub Date : 2023-01-01 DOI: 10.1590/1807-3107bor-2023.vol37.0043

Laura Firmo de Carvalho, Alexandre Marcelo de Carvalho, Bruno Salles Sotto-Maior, Carlos Eduardo Francischone, Elizabeth Ferreira Martinez, André Luiz Dias, Liliane Pacheco de Carvalho

{"title":"Microbiological analysis of bacterial sealing of internal conical implants with different taper angles.","authors":"Laura Firmo de Carvalho, Alexandre Marcelo de Carvalho, Bruno Salles Sotto-Maior, Carlos Eduardo Francischone, Elizabeth Ferreira Martinez, André Luiz Dias, Liliane Pacheco de Carvalho","doi":"10.1590/1807-3107bor-2023.vol37.0043","DOIUrl":"https://doi.org/10.1590/1807-3107bor-2023.vol37.0043","url":null,"abstract":"The present study evaluated the effect of the taper angle of different internal conical connection implants and cyclic loading on the implant-abutment bacterial seal. A total of 96 implant-abutment sets were divided into eight groups. Four groups of different taper degrees with cyclic mechanical loading of 500,000 cycles per sample, with a 120-N load at 2 Hz before analysis [16DC (16-degree, cycled), 11.5DC (11.5-degree, cycled), 3DC (3- degree, cycled) and 4DC (4- degree, cycled)] were compared to four control groups without cyclic loading [16D (16-degree), 11.5D (11.5-degree), 3D (3-degree), and 4D (4-degree)]. Microbiological analysis was performed by immersing all samples in a suspension containing Escherichia coli and incubating them at 37°C. After 14 days, the presence of bacterial seals was evaluated. Fisher-Freeman-Halton exact tests and binomial tests were performed (5% significance level). The groups showed significant differences in bacterial seal, and mechanical load cycling improved the bacterial seal in the 3DC group. In all other groups, no significant differences in bacterial seal were found between cycled and uncycled samples. To conclude, the internal conical connection with a 3-degree taper angle showed better results than the other connection with different angles when subjected to load cycling. However, none of the angles tested were fully effective in sealing the implant-abutment interface.","PeriodicalId":48942,"journal":{"name":"Brazilian Oral Research","volume":"37 ","pages":"e43"},"PeriodicalIF":2.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9773961","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

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