Brazilian dental journalPub Date : 2026-08-24eCollection Date: 2026-01-01DOI: 10.1590/0103-644020266914
Martha de Abreu Avila, José Guilherme Neves, Américo Bortolazzo Correr, Milton Santamaria-Junior, Eduardo Almada, Lourenço Correr-Sobrinho, Ana Rosa Costa
{"title":"Torque expression in conventional and self-ligating orthodontic brackets: An in vitro study.","authors":"Martha de Abreu Avila, José Guilherme Neves, Américo Bortolazzo Correr, Milton Santamaria-Junior, Eduardo Almada, Lourenço Correr-Sobrinho, Ana Rosa Costa","doi":"10.1590/0103-644020266914","DOIUrl":"10.1590/0103-644020266914","url":null,"abstract":"<p><p>This study assessed torque expression at different angulations of conventional, interactive, and passive self-ligating brackets, with or without metal ligatures, and evaluated surface morphology and chemical composition (%). All brackets (Roth prescription, 0.022\" x 0.028\" slot) were fixed to round acrylic cylinders with cyanoacrylate adhesive. Five hundred segments of rectangular archwires (0.019\" x 0.025\") were bent and welded (20 mm x 10 mm), then fixed to the brackets either with or without 0.010\" metal ligatures in ten experimental groups (n = 10). The assembled specimens were then mounted on a universal testing machine, and a vertical force was applied to the free end of the archwire, resulting in a 10 mm displacement. Mean torque values (N·mm) at specified torque angles of 0° to 25°, as well as the mean torque angles (°) corresponding to 5 and 20 N·mm, were analyzed using ANOVA and Tukey's test (α = 0.05). Bracket design and chemical composition were examined by SEM/EDS. Slot angulation and dimensional measurements were evaluated using ImageJ. Passive self-ligating brackets, without and with ligatures, showed the smallest torque angles, statistically smaller than those of the other groups (p < 0.001). Bracket clips were composed predominantly of nickel and titanium. Passive self-ligating brackets, either ligated or not, showed the highest torque expression at both 5 and 20 N·mm. Overall, torque expression was influenced more by the dimensional characteristics of brackets and rectangular archwires than by the type of ligature used. Clinically, passive self-ligating brackets may facilitate earlier torque expression during orthodontic treatment.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"37 ","pages":"e256914"},"PeriodicalIF":0.0,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13502929/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148842702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2026-08-07eCollection Date: 2026-01-01DOI: 10.1590/0103-644020266930
Larissa Luri Almeida Amorim Ikejiri, Marilia Mattar de Amoêdo Campos Velo, Nair Cristina Margarido Brondino, Carlos Alberto Spironelli Ramos, Ana Paula de Melo Alves Guedes, Tatiana Rita de Lima Nascimento, Rafael Francisco Lia Mondelli
{"title":"Influence of zinc-modified niobium nanoparticles incorporation in resinous monomers on mechanical properties.","authors":"Larissa Luri Almeida Amorim Ikejiri, Marilia Mattar de Amoêdo Campos Velo, Nair Cristina Margarido Brondino, Carlos Alberto Spironelli Ramos, Ana Paula de Melo Alves Guedes, Tatiana Rita de Lima Nascimento, Rafael Francisco Lia Mondelli","doi":"10.1590/0103-644020266930","DOIUrl":"10.1590/0103-644020266930","url":null,"abstract":"<p><p>This in vitro study evaluated the influence of the incorporation of different concentrations of zinc-modified niobium nanoparticles (Nb/Zn) on the mechanical properties of a flowable resin composite (OptiFlow II, LC/Pac-Dent) by surface hardness (SH), depth of cure (DoC), flexural strength (FS), and modulus of elasticity (E). The morphology and composition of Nb/Zn nanoparticles were evaluated by Scanning Electron Microscopy and energy-dispersive X-ray spectroscopy (EDX). The Nb/Zn nanoparticles were incorporated at 3 different concentrations (0.3%; 0.6% e 0.9%), resulting in four groups: OptiFlowII, OptiFlow II+0.3%Nb/Zn, OptiFlow II+0.6%Nb/Zn, and OptiFlow II+0.9%Nb/Zn. SH was measured at the top and bottom of the specimens (n=6/group). FS and E were conducted using a Universal Testing Machine (Instron, 50N) (n=14/group). For SH, DoC, and FS, ANOVA followed by Tukey's test was used for statistical analyses, and for E, pairwise comparisons were conducted using a sandwich covariance matrix (p<0.05). The results showed that OptiFlow II+0.6%Nb/Zn exhibited the lowest top-SH values in all comparisons (p=0.003). Regarding DoC, the data indicated a significant difference between the groups with 0.3% and 0.6% Nb/Zn (p=0.04). For E, OptiFlow II+0.3%Nb/Zn presented higher values (E=3.48±0.15)a compared to OptiFlow II+0.6%Nb/Zn (E=3.3±0.18; p=0.02)b, OptiFlowII presented higher values (E=3.56±0.27)a than OptiFlow II+0.6%Nb/Zn (p=0.01) and OptiFlow II+0.9%Nb/Zn (E=3.3±0.27; p=0.02)b. Thus, the incorporation of Nb/Zn nanoparticles at different concentrations into the OptiFlow II affects its mechanical properties, without altering the depth of cure, but reducing flexural strength. The group with the lowest nanoparticle concentration showed E similar to that of the control group and higher than that of the higher-concentration groups. Overall, the incorporation of Nb/Zn nanoparticles influenced the mechanical behavior of the flowable resin composite. Lower concentrations performed similarly to the control, while higher levels impaired properties, highlighting the need for optimized nanoparticle loading.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"37 ","pages":"e256930"},"PeriodicalIF":0.0,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13449945/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148725940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2026-08-07eCollection Date: 2026-01-01DOI: 10.1590/0103-644020266842
Valeria Bisinoto Gotti, Rafael Martins Chagas, Isabela Torres Resende, João Vitor da Silva Duarte, Marcella Bessa Palhares, Analia Gabriella Borges Ferraz Facury, César Penazzo Lepri, Vinícius Geraldo Martins, Ana Paula Ayres Oliveira
{"title":"Effect of Wetting Agents on Microhardness, Color, and Gloss of a Nanohybrid Composite after Aging.","authors":"Valeria Bisinoto Gotti, Rafael Martins Chagas, Isabela Torres Resende, João Vitor da Silva Duarte, Marcella Bessa Palhares, Analia Gabriella Borges Ferraz Facury, César Penazzo Lepri, Vinícius Geraldo Martins, Ana Paula Ayres Oliveira","doi":"10.1590/0103-644020266842","DOIUrl":"10.1590/0103-644020266842","url":null,"abstract":"<p><p>This study investigated whether wetting agent application alters surface microhardness, gloss, and color stability of a nanohybrid resin composite after simulated aging by brushing or thermocycling. Sixty discs of one nanohybrid resin composite were fabricated and divided into three conditions: no wetting agent, Wetting Resin (WR), or Modeling Resin (MR). Baseline evaluations included Knoop microhardness, color using the CIE Lab* system, and 60° gloss. Aging was performed by either standardized brushing or 10,000 thermocycles (5-55 °C). Post-aging values were compared with baseline data. Statistical analysis used two-way repeated-measures ANOVA/Tukey for microhardness, and nonparametric tests for gloss and ΔE (α = 0.05). Wetting agent application lowered baseline microhardness compared to controls, with MR showing the lowest values. Thermocycling reduced gloss, while brushing increased gloss in WR and maintained it in MR. Sealants also affected color stability, with material- and method-dependent responses. In conclusion, the wetting agent influenced the mechanical and optical behavior of the nanohybrid resin composite in a manner dependent on the agent and aging protocol. These materials reduced surface hardness and produced distinct gloss and color responses to brushing versus thermocycling.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"37 ","pages":"e256842"},"PeriodicalIF":0.0,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13449965/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148722975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2026-08-07eCollection Date: 2026-01-01DOI: 10.1590/0103-644020266525
Suely Cristina Aragão Veras Dos Santos, Tainah Oliveira Rifane, Isabel Silva do Nascimento, Lucca Reis Mesquita, Nayara Oliveira de Souza, Madiana Magalhães Moreira, Victor Pinheiro Feitosa
{"title":"Reactivation capacity of TiO2 nanoparticles for dental bleaching: an in vitro study.","authors":"Suely Cristina Aragão Veras Dos Santos, Tainah Oliveira Rifane, Isabel Silva do Nascimento, Lucca Reis Mesquita, Nayara Oliveira de Souza, Madiana Magalhães Moreira, Victor Pinheiro Feitosa","doi":"10.1590/0103-644020266525","DOIUrl":"10.1590/0103-644020266525","url":null,"abstract":"<p><p>This study evaluated the bleaching efficacy, pH behavior, and reuse potential of a titanium dioxide nanoparticle (TiO₂) suspension as a photocatalytic, peroxide-free alternative to carbamide peroxide (CP) for at-home bleaching. Forty bovine incisors were subjected to a 21-day at-home bleaching regimen (2 h/day) using fresh or reused agents (n = 10): fresh CP (16% CP), reapplied CP (16% CP collected and reused), fresh TiO₂ (10 wt% TiO₂ suspension), and reapplied TiO₂ (reactivated 10 wt% TiO₂ suspension). TiO₂ suspensions were UV-activated daily (385 nm, 50 min), and the reused TiO₂ was reactivated prior to each application. The pH of the bleaching agents was assessed before gel application and after completion of the at-home protocol; all experimental groups showed a similar pH trend, with values increasing from 6.0 to 7.0 throughout the procedure. Bleaching efficacy was evaluated using CIEDE2000 (ΔE₀₀) and whiteness index (ΔWID) values obtained with a digital spectrophotometer (VITA Easyshade V). Data were analyzed with one-way ANOVA and Tukey's test (α = 0.05). ΔE₀₀ analysis showed that fresh TiO₂ produced the lowest color change, with values closest to the perceptibility and acceptability thresholds, differing significantly from reapplied TiO₂, fresh CP, and reapplied CP (p < 0.05). No significant differences were observed among the remaining groups, and all other conditions exhibited ΔE₀₀ values above the acceptability threshold. ΔWID values did not differ significantly among groups (p = 0.475). The UV-activated TiO₂ suspension (100 min total exposure) was able to bleach teeth without peroxide.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"37 ","pages":"e256525"},"PeriodicalIF":0.0,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13449946/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148727259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2026-08-07eCollection Date: 2026-01-01DOI: 10.1590/0103-644020266906
Leonardo Alvares Sobral Silva, Giovanni de Souza Goulart Cardoso, Lucas Tadeu Pereira Dos Santos, Clarisse Maria Luiz Silva, Matheus de Paula Costa, Milton Santamaria Junior, João Maurício Ferraz da Silva
{"title":"Effect of Diamond-Coated Ultrasonic Tip Finishing on Resin Cement Bond Strength to Dentin.","authors":"Leonardo Alvares Sobral Silva, Giovanni de Souza Goulart Cardoso, Lucas Tadeu Pereira Dos Santos, Clarisse Maria Luiz Silva, Matheus de Paula Costa, Milton Santamaria Junior, João Maurício Ferraz da Silva","doi":"10.1590/0103-644020266906","DOIUrl":"10.1590/0103-644020266906","url":null,"abstract":"<p><p>This study aimed to evaluate the effect of dentin surface finishing protocols using ultrasonic CVD diamond tips on the bond strength of resin cement to dentin. Seventy-two bovine incisor crowns were prepared and assigned to four dentin surface finishing protocols (Groups 1-4, n = 18), including a conventional control group and experimental groups using ultrasonic CVD diamond tips applied sequentially with increasing fineness. One specimen per group was analyzed by scanning electron microscopy to assess surface topography and smear layer characteristics. The samples were bonded using light-cured resin cement in combination with three adhesive strategies: total-etch, self-etch, and universal adhesives. After 24 hours of storage in distilled water, microshear bond strength testing was performed (0.5 mm/min). Data were analyzed using two-way ANOVA and Tukey's post hoc test (α = 0.05). Groups 3 and 4 showed significantly higher bond strength than the control group (p < 0.05), while no significant differences were observed among adhesive strategies (p > 0.05). Surface analysis revealed that these protocols produced a more homogeneous and regular smear layer, whereas intermediate finishing resulted in a more irregular surface. It can be concluded that the sequential use of ultrasonic CVD diamond tips with increasing fineness improves the bond strength of resin cement to dentin and promotes a more favorable substrate for adhesion.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"37 ","pages":"e256906"},"PeriodicalIF":0.0,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13449944/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148724205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2026-08-07eCollection Date: 2026-01-01DOI: 10.1590/0103-644020266966
Larissa Paulino de Figueiredo, Analia Gabriella Borges Ferraz Facury, Eduardo Martinelli Franco, Gilberto Antonio Borges, Roberto Nascimento Silva, Lourenço Correr-Sobrinho, José Guilherme Neves, Ana Rosa Costa
{"title":"Addition of silver nanoparticle solutions to alginate: microbiological and mechanical analysis.","authors":"Larissa Paulino de Figueiredo, Analia Gabriella Borges Ferraz Facury, Eduardo Martinelli Franco, Gilberto Antonio Borges, Roberto Nascimento Silva, Lourenço Correr-Sobrinho, José Guilherme Neves, Ana Rosa Costa","doi":"10.1590/0103-644020266966","DOIUrl":"10.1590/0103-644020266966","url":null,"abstract":"<p><p>This study assesses the antimicrobial activity and physical alterations of alginate impression material in the presence of silver nanoparticle (AgNP) solutions. The samples were assigned to five groups according to the type of alginate and solution: (JW) Jeltrate + distilled water; (JCHX) Jeltrate + 0.2% chlorhexidine digluconate; (JAgNP_0.2%) Jeltrate + 0.2% AgNP; (JAgNP_1%) Jeltrate + 1% AgNP; and (AW) Avagel + distilled water. AgNPs were synthesized from the fungus Trichoderma reesei. Fifty impressions were made (n=10) from a matrix, from which plaster models were fabricated. Surface detail reproduction and dimensional stability were analyzed under a light microscope. Surface detail reproduction was achieved by replicating a 50µm line on the plaster model. Dimensional stability was calculated from measurements of X' and X'' in the matrix and plaster models. The antimicrobial effect was assessed independently by measuring the formation of zones of inhibition around the alginate molds (n=3) in agar medium containing Streptococcus mutans and Candida albicans. Dimensional stability values were subjected to the ANOVA and Tukey's post-hoc test (α=0.05). JCHX showed the highest dimensional stability and differed significantly from the other groups (p<0.05). A 50µm line was reproduced in the plaster for all tested groups, regardless of the impression material and antimicrobial solution. AgNPs incorporated into the alginate mixture did not produce dimensional changes in the alginate mold. AW and JCHX exhibited antimicrobial potential, as evidenced by bacterial inhibition. Jeltrate or Avagel, regardless of AgNP concentration, did not demonstrate antimicrobial activity.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"37 ","pages":"e256966"},"PeriodicalIF":0.0,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13459399/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148725423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2026-07-24eCollection Date: 2026-01-01DOI: 10.1590/0103-644020267030
Andressa Fernanda Paza Miguel, Nicole Lonni, Túlio Silva Rosa, Daniella Serafin Couto Vieira, Gustavo Davi Rabelo, Elena Riet Correa Rivero
{"title":"Histology and immune impact in OSCC.","authors":"Andressa Fernanda Paza Miguel, Nicole Lonni, Túlio Silva Rosa, Daniella Serafin Couto Vieira, Gustavo Davi Rabelo, Elena Riet Correa Rivero","doi":"10.1590/0103-644020267030","DOIUrl":"10.1590/0103-644020267030","url":null,"abstract":"<p><p>This study investigated how tumour histopathological characteristics and immune cell phenotypes in the tumour microenvironment influence the prognosis of patients with oral squamous cell carcinoma. Thirty-one samples of oral squamous cell carcinoma were analysed using immunohistochemistry to assess tumour budding, perineural invasion, depth of invasion, tumour thickness, lymphovascular invasion, pattern of invasion, and tumour-stroma ratio. Anti-CD66b and anti-CD8 immunostaining were used to examine neutrophil and lymphocyte infiltration within the tumour core, invasive front, and overall tumour. Kaplan-Meier survival curves were employed to correlate these features with patient survival. High tumour budding was observed in lesions with perineural and lymphovascular invasion and was positively associated with tumour thickness. Dispersed tumours had the highest depth of invasion and thickness, while non-cohesive tumours exhibited more perineural invasion and greater CD66b+ cell infiltration at the invasive front. Increased CD66b+ counts, non-cohesive and dispersed patterns, were associated with shorter overall survival. A higher ratio of neutrophils to lymphocytes was observed in patients who died. In conclusion, high tumour budding, perineural and lymphovascular invasion, and increased CD66b+ infiltration at the invasive front are linked to aggressive tumour behaviour and poor prognosis. These features may serve as important predictors of patient outcomes.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"37 ","pages":"e257030"},"PeriodicalIF":0.0,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13405571/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148623544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2026-07-24eCollection Date: 2026-01-01DOI: 10.1590/0103-644020266888
Flávia Arpini Ferreto, William Vinícius de Oliveira Santos, Rafael Sarkis-Onofre
{"title":"Adverse reactions and complications caused by hyaluronic acid injections in the face: A scoping review.","authors":"Flávia Arpini Ferreto, William Vinícius de Oliveira Santos, Rafael Sarkis-Onofre","doi":"10.1590/0103-644020266888","DOIUrl":"10.1590/0103-644020266888","url":null,"abstract":"<p><p>This scoping review identified and mapped the adverse reactions and complications associated with the use of hyaluronic acid (HA) dermal fillers in facial aesthetic procedures. This scoping review was reported according to the PRISMA-ScR. Searches were conducted in three electronic databases (PubMed, Scopus, and Web of Science). Randomized clinical trials, cross-sectional studies, retrospective or prospective cohort studies, case series, or case reports published until 2024 that assessed or reported the use of HA for facial filling in healthy adult patients and documented any adverse reaction or complication were included. Study selection was conducted independently by two researchers. Data extraction was performed on half of the included studies by each reviewer, with cross-checking by a third reviewer. A descriptive analysis of the data was performed, considering the different study designs and the complications and adverse reactions reported. Data were presented in tables and graphs. Fifty-five studies met the eligibility criteria and were included. Most studies were case series and case reports (67.3%). Sample sizes ranged from 1 to 5,000, and participant ages ranged from 18 to 78 years. The most reported adverse reactions among the included studies were bruising (56.4%), ischemia (45.4%), and edema (41.81%), with itching less frequent (3.6%). The most severe complications reported were tissue necrosis (29.1%) and tissue embolism (20%), with some cases leading to blindness or stroke. Bruising and ischemia were the most frequently reported adverse reactions, while tissue necrosis was the most common severe complication reported.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"37 ","pages":"e256888"},"PeriodicalIF":0.0,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13405572/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148623534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2026-07-24eCollection Date: 2026-01-01DOI: 10.1590/0103-644020266840
Fernanda Oliveira Miranda Tavares, Carolina Mara Geraldino Monteiro, Felipe Marchiori Guimarães, Renan Rocha da Silva, Andrea Vaz Braga Pintor, Lucianne Cople Maia
{"title":"Acid erosion, surface topography, and fluoride release of glass ionomer cements subjected to erosive challenge.","authors":"Fernanda Oliveira Miranda Tavares, Carolina Mara Geraldino Monteiro, Felipe Marchiori Guimarães, Renan Rocha da Silva, Andrea Vaz Braga Pintor, Lucianne Cople Maia","doi":"10.1590/0103-644020266840","DOIUrl":"10.1590/0103-644020266840","url":null,"abstract":"<p><p>To evaluate and compare the acid erosion resistance, surface topography, and fluoride release of restorative glass ionomer cements (GICs) subjected to erosive challenge. Specimens (n=6) of Vidrion R® (VD), Maxxion R® (MA), Vitro Molar® (VM), and GlasIonomer FX ULTRA® (GI) were prepared and stored in water at 5°C/24h. Baseline measurements of thickness, weight, and surface roughness (linear - Ra; volumetric - Sa) were obtained using a non-contact 3D profilometer. Specimens were immersed in 30 mL of a lactic acid buffer (pH 2.74) at 37°C/24h, after which final thickness (eroded depth), mass (eroded mass), and surface roughness were measured. Fluoride release was evaluated in duplicate using a calibrated fluoride-specific electrode. Data were analyzed using Jamovi 2.2.5 (p<0.05). All GICs showed a reduction in thickness; however, only VM exhibited an eroded depth below 0.17 mm (0.10 ± 0.03 mm, per ISO standards). Regarding mass loss, VD experienced the highest reduction and VM the lowest (p<0.05), with GI and MA showing similar losses (p>0.05). Regarding surface roughness, VD showed a reduction in Ra, whereas the other GICs showed increases (p>0.05). All specimens demonstrated a significant increase in Sa, with MA showing the greatest change (p<0.05). In fluoride release, MA and VD had the highest values (98.6 ± 11.8 and 91.4 ± 8.16), GI was intermediate (66.1 ± 4.12), and VM had the lowest (38.4 ± 9.97) (p<0.05). Although all products released fluoride and underwent significant changes in thickness, mass, and surface roughness under erosive challenge, only VM demonstrated adequate acid erosion resistance according to ISO standards.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"37 ","pages":"e256840"},"PeriodicalIF":0.0,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13405570/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148623450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2026-07-24eCollection Date: 2026-01-01DOI: 10.1590/0103-644020266851
Diego Gómez-Costa, Rocío Cascos Sánchez, José Luis Antonaya Martín, Noelia Rivas Martín, Pablo Lastra Prados
{"title":"Edentulism and prosthetic rehabilitation needs in the european adult population: A health survey analysis.","authors":"Diego Gómez-Costa, Rocío Cascos Sánchez, José Luis Antonaya Martín, Noelia Rivas Martín, Pablo Lastra Prados","doi":"10.1590/0103-644020266851","DOIUrl":"10.1590/0103-644020266851","url":null,"abstract":"<p><p>To analyse the prevalence of complete and partial edentulism in the European adult population and to evaluate demographic and geographical factors associated with tooth loss and prosthetic rehabilitation needs using national health survey data. A cross-sectional ecological study used aggregated secondary data from the European Health Interview Survey (EHIS), Eurobarometer, and national oral health surveys from Germany, Spain, France, Italy, Poland, Romania, Sweden, and the United Kingdom. Surveys published between 2010 and 2023 were included, representing more than 250,000 adults. Prevalence of complete and partial edentulism was analyzed by age group, sex, and geographical region. Descriptive statistics were calculated as percentages and absolute numbers with 95% confidence intervals. A generalized linear model with binomial distribution estimated adjusted odds ratios for complete edentulism. Statistical significance was set at α = 0.05. Complete edentulism among adults aged 65-74 years ranged from less than 6% in Northern and Western Europe to more than 40% in Eastern Europe, corresponding to approximately 3,200 to over 4,500 individuals. Partial edentulism exceeded 65% in adults aged 45 years and older across all regions. Multivariable analysis identified advanced age as the strongest predictor of complete edentulism (aOR = 28.4 for ≥75 vs. 45-54; p < 0.001), followed by residence in Eastern Europe (aOR = 9.8; p < 0.001). Sex was not independently associated with complete edentulism. Edentulism prevalence in Europe varies by age and geographical region. These findings support region-specific planning of prosthetic rehabilitation services and public health strategies to reduce oral health inequalities.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"37 ","pages":"e256851"},"PeriodicalIF":0.0,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13405569/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148623541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}