Brazilian oral research最新文献

{"title":"Negotiability of MB2 root canals using rotary or reciprocating systems: a randomized clinical trial.","authors":"Lucas Pinto Carpena, Lucas Peixoto de Araújo, Francisco Wilker Mustafa Gomes Muniz, Nadia de Souza Ferreira","doi":"10.1590/1807-3107bor-2026.vol40.049","DOIUrl":"10.1590/1807-3107bor-2026.vol40.049","url":null,"abstract":"<p><p>This randomized clinical trial evaluated the ability to negotiate second mesiobuccal (MB2) root canals in maxillary molars using nickel-titanium (NiTi) instruments in rotary and reciprocating kinematics. A total of 110 patients with MB2 canals were randomly assigned to two groups: EL - Easy Logic2 rotary instruments (n = 57) and X1B - MKLife X1 Blue reciprocating instruments (n = 53). Canals reached to full working length (FWL) were classified as \"negotiable\". In the X1B group, 96.2% of MB2 canals were negotiable, compared to 86% in the EL group, with no statistically significant difference (p = 0.152). Mean shaping time was shorter in the EL group (12.92 ± 4.36 min) than in the X1B group (14.33 ± 4.72 min), showing a significant difference (p = 0.047). Both systems showed high MB2 negotiability. However, regarding negotiability, both systems did not show statistically significant differences when adjusted Cox regression was used (Hazard ratio: 0.77; 95% confidence interval: 0.51 - 1.14). Rotary instruments showed a slight advantage in shaping time efficiency.</p>","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"40 ","pages":"e049"},"PeriodicalIF":1.4,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13405640/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148618602","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}

{"title":"Association between incidence of dental caries and body mass index among preschool children: a longitudinal study.","authors":"Maria Eliza da Consolação Soares, André Souza Rufino, Júlia Fernandes Siqueira, Valéria Silveira Coelho, Thiago Motta Rego, Maria Letícia Ramos Jorge, Joana Ramos Jorge","doi":"10.1590/1807-3107bor-2026.vol40.042","DOIUrl":"10.1590/1807-3107bor-2026.vol40.042","url":null,"abstract":"<p><p>Body mass index (BMI) disorders and dental caries are common and interrelated conditions in children, sharing risk factors such as inadequate diet and socioeconomic factors. This longitudinal study was designed to improve understanding of the determinants of children's health and, consequently, to promote health from childhood. The research was conducted between August 2017 and November 2018 in Diamantina, Brazil, and investigated the association between the incidence of dental caries and BMI in preschool children. The final sample included 122 children aged three to four years and 11 months, who were evaluated at two points over a one-year interval. The analysis showed that reduced family income (RR = 3.94; 95%CI: 1.26-12.39) and the incidence of caries (RR = 1.86; 95%CI: 1.01-3.42) were significant risk factors for low weight. Although maternal education initially appeared relevant (RR = 4.67; 95%CI: 1.48-14.73), its influence diminished when family income was considered. In conclusion, this study found an association between incidence of dental caries and low BMI (underweight) in preschoolers after one year of follow-up. The incidence of caries and the reduction or maintenance of low monthly family income were identified as risk factors for low weight in preschoolers during one year of follow-up.</p>","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"40 ","pages":"e042"},"PeriodicalIF":1.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13399976/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148618569","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}

{"title":"Dentists' knowledge, skills, attitudes and barriers towards minimal intervention dentistry.","authors":"Regina Cardoso de Moura, Matheus França Perazzo, Soraya Coelho Leal, Lucianne Cople Maia, Carla Massignan","doi":"10.1590/1807-3107bor-2026.vol40.041","DOIUrl":"10.1590/1807-3107bor-2026.vol40.041","url":null,"abstract":"<p><p>This cross-sectional study evaluated the knowledge, skills, attitudes, and perceived barriers of dentists from the Federal District, Brazil, regarding Minimal Intervention Dentistry (MID). A validated online questionnaire was administered using non-probabilistic snowball sampling, and 404 dentists participated (74% female; mean professional experience: 12 ± 10.9 years). Data were analyzed using descriptive and inferential statistics, including multiple linear regression (p < 0.05). The dependent variables were knowledge, skills, attitudes, and barriers, while the independent variables included administrative region, years of professional experience, type of graduation institution, academic qualification, professional role, and information-seeking behavior. Overall, participants demonstrated high levels of competency in MID, particularly in the preventive and diagnostic domains; however, selective carious tissue removal was the procedure performed least frequently (38.6%). Regression analyses showed that dentists involved in teaching or research reported significantly fewer barriers (β = -2.56; 95% CI: -3.90 to -1.23; p < 0.001). Dentists who had received formal training in MID achieved higher scores in knowledge (β = 2.95; 95%CI: 2.31 to 3.59; p < 0.001) and in skills and attitudes (β = 3.40; 95%CI: 2.18 to 4.62; p < 0.001), as well as fewer perceived barriers (β = -1.52; 95%CI: -2.35 to -0.68; p < 0.001). Information-seeking behavior was positively associated with greater knowledge (β = 2.35; 95%CI: 1.56 to 3.14; p < 0.001) and improved skills and attitudes (β = 3.06; 95%CI: 1.55 to 4.56; p < 0.001). Graduates from public universities presented higher scores for skills and attitudes (β = 2.17; 95%CI: 1.15 to 3.18; p < 0.001) and reported fewer barriers (β = -0.88; 95%CI: -1.61 to -0.15; p < 0.01). Brazilian dentists demonstrated a strong theoretical understanding of MID; however, practical implementation remains limited. Academic background, involvement in education and research, and proactive learning behaviors were key determinants of higher competency levels and reduced barriers to the adoption of MID.</p>","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"40 ","pages":"e041"},"PeriodicalIF":1.4,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13399977/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148618611","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}

{"title":"Physical and surface analysis of calcium silicate Clinker after acid challenge: a micro-CT and SEM study.","authors":"Karina Ines Medina Carita Tavares, Airton Oliveira Santos-Junior, Jáder Camilo Pinto, Fernanda Ferrari Esteves Torres, Juliane Maria Guerreiro-Tanomaru, Mário Tanomaru-Filho","doi":"10.1590/1807-3107bor-2026.vol40.051","DOIUrl":"10.1590/1807-3107bor-2026.vol40.051","url":null,"abstract":"<p><p>The purpose of this study was to evaluate the effect of immersion in butyric acid (BA, pH 4.1) or phosphate-buffered saline (PBS, pH 7.0) on the properties of Clinker (CL) with particle sizes of 2 to 30 µm or < 2 µm associated with zirconium oxide and manipulated with distilled water (DW) or liquid with additives (LA) compared with Bio-C Repair (BCR) and Biodentine (BIO). Dentin tubes were prepared and filled with materials. After 24 hours, the specimens were immersed in BA or PBS (n = 5) for 7 and 28 days. Micro-computed tomography was used to evaluate volumetric change, porosity, and material/dentin interface. Surface analysis was performed by scanning electron microscopy (SEM). Statistical analyses included Kruskal-Wallis and Dunn, Mann-Whitney, Wilcoxon, unpaired t-test, paired t-test, and ANOVA and Tukey tests (α = 0.05). All groups exhibited volumetric changes similar to BCR and BIO (p > 0.05). BA significantly increased porosity (approximately 8%) compared with PBS (approximately 2%), except for CL 2 to 30 µm with LA (p < 0.05). After 28 days in BA, all groups showed increased porosity and gaps at the interface compared with baseline values (p < 0.05). CL 2 to 30 µm with DW showed greater porosity and interface gaps than the other groups (p < 0.05). SEM analysis revealed that all groups showed hydroxyapatite formation on the material surface in PBS, and structural loss in BA. Findings: Acidic pH damages the material/dentin interface, increases porosity, and promotes dimensional changes in calcium silicate cements. Distilled water without additives increases the Clinker's porosity, interface gaps, and volume loss.</p>","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"40 ","pages":"e051"},"PeriodicalIF":1.4,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13384379/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148547970","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}

{"title":"Stress distribution and bone deformation around narrow-diameter implants at different placement depths and in different bone densities.","authors":"Fabricia Teixeira Barbosa, Vanessa Felipe Vargas-Moreno, Raissa Micaella Marcello-Machado, Suzana Peres Pimentel, Mônica Grazieli Corrêa, Mabelle Freitas Monteiro, Fabiano Ribeiro Cirano, Ricardo Armini Caldas, Márcio Zaffalon Casati","doi":"10.1590/1807-3107bor-2026.vol40.050","DOIUrl":"10.1590/1807-3107bor-2026.vol40.050","url":null,"abstract":"<p><p>This study evaluated the biomechanical behavior of narrow-diameter Morse taper implants (3.5 mm) placed in bone of different densities and at different depths, using finite element analysis. Sixteen three-dimensional virtual models, meshed with tetrahedral elements, were created. Each model comprised cortical bone, cancellous bone, a Morse taper implant, an abutment, and a single maxillary central incisor crown. An oblique force (30 degrees buccally) of 150 N was applied to evaluate peri-implant stress distribution across four bone densities (D1, D2, D3, and D4) and at four placement depths (0, 1, 2, and 3 mm). The interfaces were modeled as perfectly bonded, except at the implant-abutment interface (friction coefficient = 0.3). All materials were assumed to be linearly elastic and isotropic. After a nonlinear analysis, the maximum and minimum principal stresses, maximum principal strain, and Mohr-Coulomb ratio were recorded. The results revealed a stress distribution pattern with lower peak stress values at shallower placement depths and in D1 bone. All groups showed a similar trend: as the implant placement depth increased, the point of greatest stress concentration shifted apically. Implant placement in cortical bone provided a protective effect under oblique loads. In D3 and D4 bone types, crestal placement showed better biomechanical performance than subcrestal placement.</p>","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"40 ","pages":"e050"},"PeriodicalIF":1.4,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13384381/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148547967","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}

{"title":"Evaluation of the quality of life of individuals with head and neck cancer undergoing surgery and radiotherapy.","authors":"Lays Ellen Oliveira Menezes, Ana Livia Costa Soares, Giulianna Aparecida Vieira Barreto, Carlos Heli Bezerra Leite, Elyara Soares Veras, Paulo Goberlânio de Barros Silva, José Fernando Bastos de Moura","doi":"10.1590/1807-3107bor-2026.vol40.040","DOIUrl":"10.1590/1807-3107bor-2026.vol40.040","url":null,"abstract":"<p><p>Head and neck cancer (HNC) affects thousands of people worldwide. It is characterized by lesions in the oral cavity, larynx, and pharynx and is often associated with smoking and alcohol consumption. Surgery and radiotherapy improve survival but can cause sequelae that affect daily functioning and quality of life (QoL). This study aimed to assess QoL and functioning in individuals with HNC treated by surgery and radiotherapy. This descriptive, cross-sectional, prospective study enrolled 80 patients between July and September 2024. QoL was measured using the UW-QOL questionnaire, and clinical and sociodemographic data were collected through anamnesis. Statistical analyses were performed using the Friedman-Dunn test for QoL domains, and Fisher's exact test or Pearson's chi-square test for associations. Variables with p < 0.200 were further evaluated by multinomial logistic regression at a 95% confidence level using SPSS v20.0. The participants were predominantly male (70%), with a mean age of 61 years. Most patients (52.5%) reported low QoL; 43.8% reported moderate QoL. The most frequent complaints were fatigue (38.8%) and pain (20%). Low education, pain history, three-dimensional conformal radiation therapy (3D-RT) modality, and previous surgery were significantly associated with reduced QoL (p < 0.05), with low education being the main predictive factor. HNC significantly affected the QoL and functional status of patients. Rehabilitation focusing on physical and emotional support is essential for improving affected domains.</p>","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"40 ","pages":"e040"},"PeriodicalIF":1.4,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13361122/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148444617","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}

{"title":"Brazilian dentists' knowledge, skills, and attitudes towards minimal intervention dentistry: development and psychometric analysis.","authors":"Regina Cardoso de Moura, Matheus França Perazzo, Soraya Coelho Leal, Lucianne Cople Maia, Carla Massignan","doi":"10.1590/1807-3107bor-2026.vol40.039","DOIUrl":"10.1590/1807-3107bor-2026.vol40.039","url":null,"abstract":"<p><p>To date, no instrument with demonstrated structural validity has been available to assess dentists' knowledge, skills, and attitudes regarding the core concepts of Minimal Intervention Dentistry (MID). Therefore, this study aimed to develop and evaluate the psychometric properties of a self-administered instrument designed to measure Brazilian dentists' knowledge, skills, and attitudes towards MID. A cross-sectional study was conducted among dentists practicing in the Federal District of Brazil to evaluate the psychometric properties of the instrument. Item generation was followed by expert review by Brazilian MID specialists. Subsequently, two focus groups and a pre-test were conducted to assess item wording, sequence, and comprehensibility. After the necessary revisions, the instrument was administered to 454 dentists. Exploratory Factor Analysis, combined with parallel analysis, was performed (p < 0.05). A total of 404 dentists comprised the final sample for the psychometric analyses. Parallel analysis indicated a two-factor solution as the most representative, corresponding to knowledge, skills, and attitudes. Composite reliability was adequate for all factors (≥ 0.40). The factorial structure showed acceptable model fit indices, except for the RMSEA (RMSEA = 0.092). Unidimensionality was rejected, as UniCo = 0.939 (0.907-0.975) and ECV = 0.762 (0.719-0.830) did not reach the recommended thresholds. The findings suggest that the instrument presents an appropriate structure and satisfactory reliability for measuring dentists' knowledge, skills, and attitudes related to MID. This is the first study in the field of MID competencies to comprehensively report the steps involved in constructing, adapting, and psychometrically evaluating an instrument for dentists.</p>","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"40 ","pages":"e039"},"PeriodicalIF":1.4,"publicationDate":"2026-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13286577/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148307293","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}

{"title":"Occupational accidents involving biological material during dental instrument cleaning: a Brazilian national study.","authors":"Anaclara Ferreira Veiga Tipple, Júnnia Pires de Amorim Trindade, Gileade Pereira Freitas, Rafael Alves Guimarães","doi":"10.1590/1807-3107bor-2026.vol40.035","DOIUrl":"10.1590/1807-3107bor-2026.vol40.035","url":null,"abstract":"<p><p>Despite evidence regarding the severity of occupational accidents involving biological material (OAIBM) during dental instrument cleaning, these risks remain underestimated by many workers. Few studies, however, have focused on the epidemiology of OAIBM during dental instrument cleaning. Thus, this study aimed to identify, analyze, and estimate the incidence rate of OAIBM during dental instrument cleaning by dental care professionals in Brazil. Notifications registered between January 2015 and July 2020 were then extracted from the Notifiable Diseases Information System (SINAN), a Brazilian government agency responsible for reporting and investigating infectious diseases. Reports of OAIBM were analyzed by dental care professionals (dentists, oral health assistants [OHA], and oral health technicians [OHT]) from all 26 Brazilian states and the Federal District. The mean incidence rate of OAIBM among dental care professionals in Brazil during dental instrument cleaning was 314.5 cases per 100,000 professionals. Of these cases, 88.2% involved OHTs, and most affected individuals were female (94.4%). Serum, blood, or plasma accounted for most exposures (71.8%), and 85.1% of exposures were percutaneous. Gloves were the most commonly used personal protective equipment (PPE) at the time of the accidents. Therefore, this study highlights the role of the dentist as the leader and technical authority, responsible for providing resources, standardizing processes, training the team, and supervising performance to ensure occupational safety, quality processing, and contributions to patient safety.</p>","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"40 ","pages":"e035"},"PeriodicalIF":1.4,"publicationDate":"2026-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13286581/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148307241","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}

{"title":"Tinnitus, temporomandibular disorders and muscle activity: what's the connection?","authors":"Elif Çoban, Berkan Altay, Mehmet Çağatay Ulucan, Selver Suna BaŜak, Berceste Güler, Merve Akdeniz Leblebiciler, Vural Kavuncu","doi":"10.1590/1807-3107bor-2026.vol40.037","DOIUrl":"10.1590/1807-3107bor-2026.vol40.037","url":null,"abstract":"<p><p>This study was aimed at comparatively evaluating the relationship between temporomandibular disorder (TMD) and subjective tinnitus, as well as the effects of TMD treatment on masticatory muscle activity, tinnitus symptoms, and patient perception. In this prospective cohort study, patients diagnosed with both TMD and tinnitus were divided into groups with or without bruxism. The inclusion criteria were confirmed diagnosis of TMD and tinnitus. The exclusion criteria were history of prior TMD treatment, neurological disorders, or systemic diseases affecting muscle function. The primary outcome measures were electromyographic (EMG) assessments of masseter muscle maximum voluntary contraction (MVC) and the percentage of overlapping coefficient (%POC), determined via surface EMG (sEMG). The secondary outcomes included changes in tinnitus symptoms, assessed with the Tinnitus Handicap Inventory (THI), and pain levels, evaluated with the Visual Analog Scale (VAS). A total of 70 eligible participants were evenly distributed between groups. Tinnitus symptoms resolved in 35.7% of patients and did not significantly differ between groups (p > 0.05). Masseter MVC values decreased numerically but non-significantly after treatment (p > 0.05). In contrast, significant post-treatment improvements were observed in %POC, VAS, and THI scores (p < 0.05). Pre- and post-treatment comparisons of MVC, %POC, VAS, and THI revealed no significant intergroup differences (p > 0.05). TMD treatment appeared to effectively decrease subjective tinnitus symptoms and improve quality of life. Our findings suggest that TMD management might play an important role in tinnitus treatment and indicate that tinnitus is more associated with underlying internal disorders than with masticatory muscle activity directly influenced by bruxism.</p>","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"40 ","pages":"e037"},"PeriodicalIF":1.4,"publicationDate":"2026-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13286576/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148307279","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}

{"title":"Protective effect of cocoa antioxidant extract in distinct vehicles on dentin erosion in vitro.","authors":"Gabriela Carvalho Santos Fernandes, Maria Eduarda Martins Bentes, Tayanne Laise da Rocha Pirixan Louzeiro, Pedro Henrique Campos Pimentel, Gilson Celso Albuquerque Chagas-Junior, Nelson Rosa Ferreira, Maria do Perpétuo Socorro Progene Vilhena, Daniela Pinheiro Gaspar, Cristiane de Melo Alencar","doi":"10.1590/1807-3107bor-2026.vol40.038","DOIUrl":"10.1590/1807-3107bor-2026.vol40.038","url":null,"abstract":"<p><p>This study aimed to conduct an in vitro evaluation of the antierosive potential of a solution and an experimental toothpaste enriched with natural antioxidants derived from cocoa (Theobroma cacao L.) on eroded dentin. Cocoa beans underwent fermentation, drying, roasting, grinding, and freeze-drying to obtain an aqueous cocoa extract. The extract was analyzed for total polyphenols and antioxidant capacity using the oxygen radical antioxidant capacity (ORAC) assay. A control toothpaste was then formulated and enriched with the concentrated cocoa extract. Eighty bovine dentin specimens were pre-eroded in citric acid and randomized into four groups (n = 20): G1 (negative control) - toothpaste without active ingredients; G2 - concentrated cocoa polyphenol solution; G3 - experimental toothpaste enriched with cocoa polyphenols; and G4 (positive control) - Elmex Protect commercial toothpaste (Colgate). Specimens underwent 3 days of erosive cycling. Surface loss (dSL-eroded) was measured by optical profilometry; collagen degradation (dColl) was calculated after collagenase exposure; and calcium release (CaR) was quantified by atomic absorption spectrometry. Surface morphology was qualitatively assessed by scanning electron microscopy (SEM). Data were analyzed by one-way ANOVA and Tukey's test (α=0.05). The cocoa extract showed higher levels of total polyphenols than did the enriched toothpaste (p = 0.037). Antioxidant activity decreased after toothpaste manipulation (p = 0.025). G2 exhibited significantly lower dSL-eroded, dColl, dSL-total, and calcium release compared with the other groups (p<0.05). SEM analysis of G3 revealed partially or totally occluded dentinal tubules. In conclusion, cocoa extract exhibited a higher polyphenol content and significant antierosive effects, leading to reduced dentin surface loss and enhanced tubule occlusion.</p>","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"40 ","pages":"e038"},"PeriodicalIF":1.4,"publicationDate":"2026-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13286578/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148307319","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}