Brazilian oral research最新文献

Effects of radiation therapy on the morphology and composition of root dentin and cementum in primary teeth. 放射治疗对原牙牙根牙本质和骨水泥的形态和组成的影响。

IF 1.5 4区医学

Brazilian oral research Pub Date : 2025-02-24 eCollection Date: 2025-01-01 DOI: 10.1590/1807-3107bor-2025.vol39.026

Julio Cesar Ramos Cadilho, Paôla Caroline da Silva Mira, Jéssica Peixoto Bem, Penélope Swerts Rodrigues, Francisco José de Queiroz Thomé, Harley Francisco de Oliveira, Fernando Marin Torres, Francisco Wanderley Garcia Paula-Silva, Paulo Nelson-Filho, Alexandra Mussolino de Queiroz

{"title":"Effects of radiation therapy on the morphology and composition of root dentin and cementum in primary teeth.","authors":"Julio Cesar Ramos Cadilho, Paôla Caroline da Silva Mira, Jéssica Peixoto Bem, Penélope Swerts Rodrigues, Francisco José de Queiroz Thomé, Harley Francisco de Oliveira, Fernando Marin Torres, Francisco Wanderley Garcia Paula-Silva, Paulo Nelson-Filho, Alexandra Mussolino de Queiroz","doi":"10.1590/1807-3107bor-2025.vol39.026","DOIUrl":"10.1590/1807-3107bor-2025.vol39.026","url":null,"abstract":"The aim of this study was to evaluate, in vitro, the effects of radiation therapy on the morphology and chemical composition of root dentin and cementum of primary teeth. Roots of human primary teeth were exposed to varying doses of irradiation using a linear accelerator: Group 1 = irradiation dose of up to 30 Gy (n= 6); Group 2 = irradiation dose of up to 42 Gy (n= 6); and Group 3 = irradiation dose of up to 54 Gy (n= 6). Non-irradiated human deciduous teeth were used as controls (n= 3). Energy-dispersive X-ray spectroscopy (EDX) data were analyzed using the chi-square test (alpha = 5%). The morphological evaluation was performed using scanning electron microscopy (SEM). In the cementum, radiation increased inorganic composition and decreased oxygen levels. However, no morphological changes were observed. In the root dentin, obliterated dentinal tubules were observed in specimens irradiated with 54 Gy, with no changes in composition. Thus, radiation therapy significantly altered the morphology and composition of important tooth structures such as dentin and cementum, in primary teeth.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"39 ","pages":"e026"},"PeriodicalIF":1.5,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11849964/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143499324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Caries risk factors among Indonesian adults: insights from the national health survey.

IF 1.5 4区医学

Brazilian oral research Pub Date : 2025-02-24 eCollection Date: 2025-01-01 DOI: 10.1590/1807-3107bor-2025.vol39.025

Yuanita Lely Rachmawati, Agustine Hanafi Putri, Rahmavidyanti Priyanto, Khansa Catraliya Nabilah, Ananda Dhea Salsabila Gani, Tuti Ningseh Mohd-Dom

{"title":"Caries risk factors among Indonesian adults: insights from the national health survey.","authors":"Yuanita Lely Rachmawati, Agustine Hanafi Putri, Rahmavidyanti Priyanto, Khansa Catraliya Nabilah, Ananda Dhea Salsabila Gani, Tuti Ningseh Mohd-Dom","doi":"10.1590/1807-3107bor-2025.vol39.025","DOIUrl":"10.1590/1807-3107bor-2025.vol39.025","url":null,"abstract":"Although caries is a preventable disease, it is still a health burden in all countries in all age categories. This study aimed to identify the determinants associated with caries risk factors in Indonesian adults. This secondary analysis used 2018 National Health Survey data, which included 37,057 respondents aged ≥ 15 years. The sampling design was based on census blocks selected using linear systematic sampling with probability proportional to size (PPS). The survey included an interview to collect data on sociodemographic characteristics, oral health practice, and health behavior. An oral examination was conducted to measure the DMFT (decayed, missing, filled- teeth) index. Multivariable models were generated to estimate the odds ratio (OR) and confidence intervals (95% CI) using caries as the dependent variable. The highest average DMFT index was seen in those respondents aged over 45 years, those from rural areas, individuals with low formal education, those who consumed sweets and sugary beverages at least once a day, those who did not brush their teeth regularly, and those who smoked. The multivariable analysis showed the potential risk of caries: risk of 19.51 times for older adults, 74% for male, 94% for those living in rural areas, 1.62 times for those with lower formal education, 78% for those with no dental visits, 1.18 times for those who eat sweets often, 1.37 times for those who drink sugary beverages often, 1.48 times for those who do not brush their teeth regularly, and 1.3 times for those who smoke. The multifaceted nature of caries in the Indonesian adult population highlights the influence of various factors, ranging from lifestyle habits and oral hygiene practices to access to dental services, age, and educational level.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"39 ","pages":"e025"},"PeriodicalIF":1.5,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11849963/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143499386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of pellicle modification with polyphenol-rich solutions on enamel erosion and abrasion. 用富含多酚的溶液改性胶粒对珐琅质侵蚀和磨损的影响

IF 1.5 4区医学

Brazilian oral research Pub Date : 2025-02-21 eCollection Date: 2025-01-01 DOI: 10.1590/1807-3107bor-2025.vol39.024

Mariane Cintra Mailart, Ilirida Berisha, Ana Sofia Arana Reinales, Samira Helena Niemeyer, Alessandra Bühler Borges, Tommy Baumann, Thiago Saads Carvalho

{"title":"Effect of pellicle modification with polyphenol-rich solutions on enamel erosion and abrasion.","authors":"Mariane Cintra Mailart, Ilirida Berisha, Ana Sofia Arana Reinales, Samira Helena Niemeyer, Alessandra Bühler Borges, Tommy Baumann, Thiago Saads Carvalho","doi":"10.1590/1807-3107bor-2025.vol39.024","DOIUrl":"10.1590/1807-3107bor-2025.vol39.024","url":null,"abstract":"The aim of the study was to compare the effect of salivary pellicle modification with polyphenol-rich solutions containing fluoride on enamel erosion and abrasion. Human enamel specimens (n = 14/group) were assigned to five pellicle-modifying groups: GSE+F (grape seed extract +500 ppm F-); CRA+F (cranberry extract +500 ppm F-); NaF (sodium fluoride solution -5 00ppm F-); Sn+F (commercial solution, SnCl2/NaF/AmF); and DW (deionized water, negative control). The specimens were submitted to 5 cycles, each one consisting of pellicle formation (120μl, 30 min, 37°C, no agitation), followed by pellicle modification with the experimental solutions (5 ml, 2 min, 25ºC, 70 rpm), and subsequent salivary pellicle formation (120 μl, 60 min, 37°C, no agitation). The specimens were then submitted to erosion (1% citric acid, 10 ml, 1 min, pH 3.6, 70 rpm, 25ºC). Subsequently, they were submitted to abrasion with a fluoride-based toothpaste slurry in a toothbrushing machine (50 strokes, 200 g load, 2 min exposed to slurry). The enamel surface was evaluated with an optical profilometer at baseline and after the 5 cycles to assess the surface loss. Data were submitted to Kruskal-Wallis followed by a multiple comparisons test (α = 0.05). Significant differences were found between the tested solutions (p <0.001). The highest surface loss was verified in the DW group (p < 0.001). The other tested solutions (GSE+F, CRA+F, Sn+F, NaF) promoted significant enamel protection against the erosive-abrasive challenges with no differences between them. In conclusion, the modification of salivary pellicle with both polyphenol-rich, commercial solution and fluoride solutions were able to protect the enamel surface from erosion and abrasion.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"39 ","pages":"e024"},"PeriodicalIF":1.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11844817/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143499393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural equation modeling of the association between oral health literacy and dental caries in children.

IF 1.5 4区医学

Brazilian oral research Pub Date : 2025-02-21 eCollection Date: 2025-01-01 DOI: 10.1590/1807-3107bor-2025.vol39.021

Larissa Chaves Morais de Lima, Érick Tássio Barbosa Neves, Matheus França Perazzo, Veruska Medeiros Martins Bernardino, Samara Ellen da Silva, Saul Martins de Paiva, Fernanda de Morais Ferreira, Ana Flávia Granville-Garcia

{"title":"Structural equation modeling of the association between oral health literacy and dental caries in children.","authors":"Larissa Chaves Morais de Lima, Érick Tássio Barbosa Neves, Matheus França Perazzo, Veruska Medeiros Martins Bernardino, Samara Ellen da Silva, Saul Martins de Paiva, Fernanda de Morais Ferreira, Ana Flávia Granville-Garcia","doi":"10.1590/1807-3107bor-2025.vol39.021","DOIUrl":"10.1590/1807-3107bor-2025.vol39.021","url":null,"abstract":"The aim of this study was to explore the association between oral health literacy (OHL) and dental caries in children, evaluating the direct and indirect effects of brushing frequency, obesity, and socioeconomic factors. A cross-sectional study was conducted with 739 schoolchildren aged eight to ten years and their parents/caregivers who answered a questionnaire addressing sociodemographic characteristics and oral hygiene habits as well as the OHL - Adult Questionnaire. Cavitated dental caries in the schoolchildren was evaluated using International Caries Detection and Assessment System criteria. Descriptive analysis was performed, followed by structural equation modeling into the theoretical model (95% CI). Goodness-of-fit indices were considered satisfactory (root mean square error of approximation < 0.06; comparative fit index > 0.90-0.95; standardized root mean square residual < 0.10 and Tucker-Lewis Index > 0.90-0.95). Mother's age (standardized coefficient [SC]: -0.08; p < 0.01), caregiver's schooling (SC: -0.22; p < 0.01), obesity (SC: 0.13; p < 0.01), and brushing frequency (SC: -0.09; p < 0.01) had a direct effect on dental caries, whereas OHL had an indirect influence on the outcome. Mother's age, caregiver's schooling, brushing frequency, and obesity directly affected the occurrence of cavitated carious lesions in children in the mixed dentition phase, whereas OHL had an indirect effect on this clinical outcome.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"39 ","pages":"e021"},"PeriodicalIF":1.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11844814/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143499452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bone mineral density in patients using aromatase inhibitors: a clinical, nutritional, and quality of life assessment.

IF 1.5 4区医学

Brazilian oral research Pub Date : 2025-02-21 eCollection Date: 2025-01-01 DOI: 10.1590/1807-3107bor-2025.vol39.023

Alessandra Figueiredo de Souza, Sâmila Gonçalves Barra, Amanda Leal Rocha, Larissa Marques Bemquerer, Sicilia Rezende Oliveira, Larissa Nayane Carvalho, Tânia Mara Pimenta Amaral, Claudia Borges Brasileiro, Fernando Oliveira Costa, Leandro Napier Souza, Bruno Muzzi Camargos, Enaldo Melo de Lima, Adaliene Versiani Matos Ferreira, Joyce Elisa Heredia, Marina Chaves de Oliveira, Soraia Macari, Lucas Guimarães Abreu, Ricardo Alves Mesquita, Tarcília Aparecida Silva

{"title":"Bone mineral density in patients using aromatase inhibitors: a clinical, nutritional, and quality of life assessment.","authors":"Alessandra Figueiredo de Souza, Sâmila Gonçalves Barra, Amanda Leal Rocha, Larissa Marques Bemquerer, Sicilia Rezende Oliveira, Larissa Nayane Carvalho, Tânia Mara Pimenta Amaral, Claudia Borges Brasileiro, Fernando Oliveira Costa, Leandro Napier Souza, Bruno Muzzi Camargos, Enaldo Melo de Lima, Adaliene Versiani Matos Ferreira, Joyce Elisa Heredia, Marina Chaves de Oliveira, Soraia Macari, Lucas Guimarães Abreu, Ricardo Alves Mesquita, Tarcília Aparecida Silva","doi":"10.1590/1807-3107bor-2025.vol39.023","DOIUrl":"10.1590/1807-3107bor-2025.vol39.023","url":null,"abstract":"The use of aromatase inhibitors (AIs) leads to an imbalance in bone remodeling and can cause osteoporosis. This study aimed to identify clinical, periodontal, nutritional, and biochemical determinants of bone mineral density (BMD) changes in patients using AIs. The sample consisted of 40 women using AIs and 32 controls. BMD was assessed by dual X-ray absorptiometry (DXA). Data on nutritional, anthropometric, oral and periodontal status, and oral health-related quality of life (OHRQoL) were collected. Cytokines and adipokines were quantified in saliva and serum. Thirty-nine of the 72 women had low BMD, with a similar distribution in the control and AIs groups. BMD was lower in older women using AIs (p = 0.009) and in smokers (p = 0.034). Anthropometric assessment demonstrated that women with low BMD who used AIs had lower weight (p = 0.028). Although the frequency of periodontitis was similar in all groups, higher IL-6 (p = 0.004), IL-1β (p = 0.002), and IL-33 (p = 0.006) levels were associated with poor periodontal status. Women who used AIs were 1.18 times more likely to report better OHRQoL than controls. While advanced age, smoking, and lower weight are factors associated with low BMD, the use of antiresorptive agents was a protective factor for maintaining BMD in women using AIs.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"39 ","pages":"e023"},"PeriodicalIF":1.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11844819/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143499371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Properties of 3D-Printed resins for interim restorations: effects of printing and post-curing protocols.

IF 1.5 4区医学

Brazilian oral research Pub Date : 2025-02-21 eCollection Date: 2025-01-01 DOI: 10.1590/1807-3107bor-2025.vol39.019

Leandro Edgar Pacheco, Fernanda Balestrero Cassiano, Vitor de Toledo Stuani, Isabela Sanches Pompeo da Silva, Larissa Alamo, Matheus de Castro Costa, Marcella Fernandes Lovison, Sergio Kyioshi Ishikiriama, Rafael Francisco Lia Mondelli, Diana Gabriela Soares

{"title":"Properties of 3D-Printed resins for interim restorations: effects of printing and post-curing protocols.","authors":"Leandro Edgar Pacheco, Fernanda Balestrero Cassiano, Vitor de Toledo Stuani, Isabela Sanches Pompeo da Silva, Larissa Alamo, Matheus de Castro Costa, Marcella Fernandes Lovison, Sergio Kyioshi Ishikiriama, Rafael Francisco Lia Mondelli, Diana Gabriela Soares","doi":"10.1590/1807-3107bor-2025.vol39.019","DOIUrl":"10.1590/1807-3107bor-2025.vol39.019","url":null,"abstract":"This study analyzed the properties of three-dimensional (3D)-printed resins designed for interim restorations and subjected to different printing and post-curing protocols. Specimens were manufactured with two 3D-printed resins for interim restorations at varying exposure times per layer, in accordance with the manufacturer's recommendations (Tm) or using a calibrator (Tc). Subsequently, the specimens were post-cured for 5, 10, or 15 min. Trueness, surface roughness, and color analyses were performed. For biological characterization, the specimens were incubated for up to 72 h in a culture medium, and the extracts were applied at 24-h intervals to keratinocyte cells (NOK-Si). Cellular metabolism was evaluated after 1 and 3 days. Leaching of residual monomers from the extracts was evaluated. Data were analyzed using two-way analysis of variance (ANOVA) and Tukey's honestly significant difference (HSD) test (α = 5%). The exposure time beyond Tc resulted in specimens with increased trueness and smoother surfaces. Color stability was also influenced by the type of resin and post-curing time; the longer the time, the greater the color change, allowing for brighter and clearer specimens. The resins were cytocompatible with NOK-Si, regardless of the printing and post-curing parameters, although residual monomer leaching was affected by the parameters tested. The evaluated resins were cytocompatible; however, variations in the exposure times per layer and post-curing duration affected their roughness, leaching, trueness, and color stability.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"39 ","pages":"e019"},"PeriodicalIF":1.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11844818/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143499419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Patient-centered factors associated with orthodontic treatment success: a scoping review.

IF 1.5 4区医学

Brazilian oral research Pub Date : 2025-02-21 eCollection Date: 2025-01-01 DOI: 10.1590/1807-3107bor-2025.vol39.020

Lucas Garcia Santana, Luisa Gatti-Reis, Saul Martins Paiva, Maria Letícia Ramos-Jorge, Leandro Silva Marques

{"title":"Patient-centered factors associated with orthodontic treatment success: a scoping review.","authors":"Lucas Garcia Santana, Luisa Gatti-Reis, Saul Martins Paiva, Maria Letícia Ramos-Jorge, Leandro Silva Marques","doi":"10.1590/1807-3107bor-2025.vol39.020","DOIUrl":"10.1590/1807-3107bor-2025.vol39.020","url":null,"abstract":"The aim of this systematic review was to synthesize the available literature on pretreatment factors, from a patient-centered perspective, that predict successful orthodontic treatment. Systematic and unrestricted searches were conducted across the electronic MEDLINE, Embase, Web-of-Science, Scopus, Cochrane Library, and LILACS/Bireme databases. Grey literature was also searched to identify potential studies. Qualitative assessments of the role of patient-centered pretreatment factors in orthodontic treatment success (adherence, satisfaction, and discontinuation rates) were evaluated and synthesized. Study selection and data extraction were performed independently by two reviewers. A total of sixteen studies were included. Three main domains related to the patient emerged as positive predictors of orthodontic treatment success: previous patterns of social behavior, attitudes of parents/caregivers, and reasonable motivation. Certain personality traits were associated with both positive and negative levels of adherence and treatment satisfaction. The evidence did not support the notion that the impact of malocclusion on aesthetic self-perception could serve as an indicator of cooperation, satisfaction, or discontinuation rates related to orthodontic treatment. Positive social behavior patterns and parental/caregiver attitudes, along with realistic prior motivation toward treatment goals, were found to be reliable predictors of orthodontic treatment success. Additionally, some personality traits were found to be associated with successful treatment outcomes. However, the evidence did not support the impact of malocclusion on self-perceived aesthetics as an indicator of compliance and satisfaction levels with orthodontic treatment.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"39 ","pages":"e020"},"PeriodicalIF":1.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11844816/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143499328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Presentation of a new multifunctional oral cavity simulator: the "MOCS".

IF 1.5 4区医学

Brazilian oral research Pub Date : 2025-02-21 eCollection Date: 2025-01-01 DOI: 10.1590/1807-3107bor-2025.vol39.022

Tamires Timm Maske, Maximiliano Sérgio Cenci, Rafael Patzlaff, Iniative Mocs, Lina Naomi Hashizume, Marisa Maltz, Rodrigo Alex Arthur

引用次数: 0

Carbon fiber-reinforced PEEK as a framework material for single implant-retained mandibular overdentures.

IF 1.5 4区医学

Brazilian oral research Pub Date : 2025-02-07 eCollection Date: 2025-01-01 DOI: 10.1590/1807-3107bor-2025.vol39.018

Guilherme Almeida Borges, Marcelo Ferraz Mesquita, Luana Figueiredo da Silva Matias, Thaís Barbin, Leonardo Mendes Ribeiro Machado, Valentim Adelino Ricardo Barão

{"title":"Carbon fiber-reinforced PEEK as a framework material for single implant-retained mandibular overdentures.","authors":"Guilherme Almeida Borges, Marcelo Ferraz Mesquita, Luana Figueiredo da Silva Matias, Thaís Barbin, Leonardo Mendes Ribeiro Machado, Valentim Adelino Ricardo Barão","doi":"10.1590/1807-3107bor-2025.vol39.018","DOIUrl":"10.1590/1807-3107bor-2025.vol39.018","url":null,"abstract":"This study aimed to assess the biomechanical behavior of reinforcement materials [cobalt chromium alloy (CoCr) and carbon fiber-reinforced polyether ether ketone (CFR-PEEK)] and their extensions (short: 15 mm and long: 25 mm) of single implant-retained mandibular overdentures (MO-1) by 3D finite element analysis (FEA), comparing them with MO-1 without a framework. Five models (CoCr-Short, CFR-PEEK-Short, CoCr-Long, CFR-PEEK-Long, and no framework) were created using the McNeel Rhinoceros 3D software, version 7.0. Stress distribution analysis by FEA was performed using the Optstruct solver, and a 30° oblique load (100 N) was applied in the anterior region (50 N on each central incisor). Biomechanical behavior was analyzed by overdenture displacement, maximum (MaxP) and minimum principal (MinP) stress, and von Mises stress. The MO-1 model 'without a framework' produced the largest dislocation, MinP stress on the mucosa, and MaxP stress in the cortical bone. Regardless of the extension of the framework, CFR-PEEK had minor MinP stress in the mucosa and lower overdenture displacement. The 'CoCr-Long' and 'CFR-PEEK-Long' models had higher von Mises stress on the implant housing, and MaxP stress on the O'ring nylon conventional implant and overdenture. The 'CoCr-Short' and ' CFR-PEEK-Short' models showed a greater tendency for tension concentration solely in the framework. The incorporation of a framework into MO-1 decreased stress concentration on the overdenture, resulting in lower stress on the attachment, mucosa, implant, and peri-implant bone, irrespective of the material used. The short framework, however, performed better biomechanically in MO-1, and it is therefore the most recommended option. CFR-PEEK showed favorable biomechanical outcomes, and is suggested for reinforcement of MO-1.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"39 ","pages":"e018"},"PeriodicalIF":1.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11808703/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143398188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of polyethylene fiber-reinforced composite resin and thermomechanical cycling on dentin bond strength.

IF 1.5 4区医学

Brazilian oral research Pub Date : 2025-02-07 eCollection Date: 2025-01-01 DOI: 10.1590/1807-3107bor-2025.vol39.013

Maria Isabel Guimarães Carvalho Ribeiro Pimentel, Kamila Rosamilia Kantovitz, Cecília Pedroso Turssi, Flávia Lucisano Botelho do Amaral, Roberta Tarkany Basting, Leandro de Moura Martins, Fabiana Mantovani Gomes França

{"title":"Impact of polyethylene fiber-reinforced composite resin and thermomechanical cycling on dentin bond strength.","authors":"Maria Isabel Guimarães Carvalho Ribeiro Pimentel, Kamila Rosamilia Kantovitz, Cecília Pedroso Turssi, Flávia Lucisano Botelho do Amaral, Roberta Tarkany Basting, Leandro de Moura Martins, Fabiana Mantovani Gomes França","doi":"10.1590/1807-3107bor-2025.vol39.013","DOIUrl":"10.1590/1807-3107bor-2025.vol39.013","url":null,"abstract":"This study evaluated the microtensile bond strength (μTBS) and fracture pattern of direct composite resin reinforced with polyethylene fiber (Ribbond®) on dentin substrate after thermomechanical cycling (TMC). Dentin blocks (dentin thickness=2 mm) were obtained from forty human third molars and randomly divided into four groups (n=10) according to type of restoration (composite resin with or without Ribbond®) and to whether they were or were not subjected to TMC (100,000 cycles of 50 N / 2 Hz / 1-minute baths of 5 and 55ºC). The 1-mm-thick square-shaped specimens were submitted to μTBS testing in a universal testing machine at 0.5 mm/min. The fracture patterns were assessed by stereoscopic magnifying glass (30X magnification). The μTBS (in MPa) and failure pattern data were subjected to the generalized linear model and G tests (a=0.05). Neither the polyethylene fiber nor TMC had any statistically significant effect (p=0.196 and p=0.136, respectively) on the μTBS of the composite resin to dentin. Adhesive failures were more prevalent in the composite resin group compared with the Ribbond-containing group when subjected to TMC. Additionally, the composite resin containing Ribbond® showed a higher proportion of cohesive failures in composite resin than the resin groups not containing this fiber, irrespective of TMC. It was concluded that reinforcing the direct layer of composite resin with Ribbond® polyethylene fiber did not influence the adhesive resistance to dentin, even when subjected to TMC. However, its incorporation did result in a higher frequency of cohesive failures in resin after TMC.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"39 ","pages":"e13"},"PeriodicalIF":1.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11808700/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143398222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0