Brazilian dental journalPub Date : 2025-04-07eCollection Date: 2025-01-01DOI: 10.1590/0103-644020255813
Luiz Eduardo Monteiro Dias da Rocha, Ricardo Guimarães Fischer
{"title":"Papain associated with root planing in treatment of periodontitis.","authors":"Luiz Eduardo Monteiro Dias da Rocha, Ricardo Guimarães Fischer","doi":"10.1590/0103-644020255813","DOIUrl":"10.1590/0103-644020255813","url":null,"abstract":"<p><p>Although subgingival scaling and root planing (SRP) are the \"gold standard\" treatment for periodontitis, these processes may remove excessive cement, exposing dentin and causing hypersensitivity, or producing defects such as ridges and grooves, leaving residual calculus and preventing access to the whole of the root surface. A papain gel that removes carious dentin (Papacárie®) has been introduced and this gel may also help to remove supra and subgingival calculus, acting on its organic portion and biofilm, decreasing the consumption of cement and generating lower levels of aerosol compared to SRP. The aim of the present split-mouth, single-blind study was thus to compare the effectiveness of papain gel with subgingival root planning (RP). After receiving oral hygiene instruction, supragingival scaling, and coronary polishing, 18 periodontitis patients (6 women and 12 men, mean age of 51 ± 8 years) were included in the study. Treatment involved subgingival application of the gel for one minute, followed by RP while the control group received subgingival SRP. Treatment was conducted by three operators and a blinded examiner recorded the following clinical parameters at baseline and after three months: plaque index (PI), bleeding on probing (BoP), probing pocket depth (PPD), clinical attachment level (CAL), and gingival recession (GR). The results showed significant improvements in clinical parameters, in both the treatment and the control group, with no statistical difference between them. It was concluded that papain did not provide any additional.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"36 ","pages":"e255813"},"PeriodicalIF":0.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143805266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2025-04-07eCollection Date: 2025-01-01DOI: 10.1590/0103-644020256036
João Marcos Spessoto Pingueiro, Murilo Fernando Neuppmann Feres, Carla Cristina Macedo Vaz-Monteiro, Helen Karine Vieira-Silva, Gustavo Quilles Vargas, Larissa Matias Malavazi, Pedro Luiz Rosalen, Jamil Awad Shibli, Marina Guimarães Roscoe, Bruno Bueno-Silva
{"title":"Brazilian red propolis as a potential antimicrobial additive in orthodontic primers.","authors":"João Marcos Spessoto Pingueiro, Murilo Fernando Neuppmann Feres, Carla Cristina Macedo Vaz-Monteiro, Helen Karine Vieira-Silva, Gustavo Quilles Vargas, Larissa Matias Malavazi, Pedro Luiz Rosalen, Jamil Awad Shibli, Marina Guimarães Roscoe, Bruno Bueno-Silva","doi":"10.1590/0103-644020256036","DOIUrl":"10.1590/0103-644020256036","url":null,"abstract":"<p><p>This study evaluated the effect of adding ethanolic extract of red propolis (EERP) on antimicrobial activity, polymerization kinetics (PK), degree of conversion (DC), and shear bond strength (SBS) of the orthodontic adhesive system. Transbond XT Primer was the control group (G1). The experimental adhesives contained 3.25 mg/mL (G2) and 6.50 mg/mL (G3) EERP. Minimum inhibitory concentration and biofilm assay against Streptococcus mutans, and bacterial and exopolysaccharide (EPS) evaluation by confocal laser scanning microscope were performed. PK and DC were evaluated by Fourier Transform Infrared Spectroscopy. The bracket-tooth SBS was evaluated by a universal testing machine. Both antimicrobial and SBS results were analyzed by ANOVA and Tukey's post-hoc test (p<0.05). PK and DC data were submitted to ANOVA and Bonferroni post-hoc test. G3 presented better antimicrobial activity, inhibiting more than 95% of planktonic S. Mutans, 25% of biofilm dry-weight, and 50% of EPS production (p<0.05). PK was different among the groups. DC after 40 seconds of photoactivation ranged from 68.62% for G1 to 76.85% for G2 (p<0.05). SBS data was not presented as statistically significant (p>0.05). Transbond XT Primer modified with 6.5 mg/mL EERP demonstrated antimicrobial activity with no reduction of the bracket-tooth SBS. Propolis-modification did not influence the physic-chemical properties of the orthodontic adhesive.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"36 ","pages":"e246036"},"PeriodicalIF":0.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143805262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2025-04-07eCollection Date: 2025-01-01DOI: 10.1590/0103-644020256471
José Mauro Granjeiro, Altair Antoninha Del Bel Cury, Jaime Aparecido Cury, Mike Bueno, Manoel Damião Sousa-Neto, Carlos Estrela
{"title":"The Future of Scientific Writing: AI Tools, Benefits, and Ethical Implications.","authors":"José Mauro Granjeiro, Altair Antoninha Del Bel Cury, Jaime Aparecido Cury, Mike Bueno, Manoel Damião Sousa-Neto, Carlos Estrela","doi":"10.1590/0103-644020256471","DOIUrl":"10.1590/0103-644020256471","url":null,"abstract":"<p><p>Artificial Intelligence (AI) transforms scientific writing by improving efficiency, accessibility, and quality. This study evaluated the applications, benefits, and challenges of AI tools, including Elicit, Perplexity, Consensus, ChatGPT, and Grammarly, in the literature review, information organization, and textual clarity enhancement. A narrative review and practical analysis were conducted, assessing the tools based on synthesis capabilities, accessibility, and accuracy. Results showed that AI tools optimize literature analysis and enhance the clarity of scientific texts, particularly for non-native English-speaking researchers. However, limitations include technical inaccuracies, excessive standardization of writing style, and ethical concerns regarding authorship and accountability. The study concludes that while AI can significantly support scientific writing, its adoption should be accompanied by stringent human oversight and adherence to ethical guidelines to maintain academic integrity.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"36 ","pages":"e256471"},"PeriodicalIF":0.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143804750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2025-04-07eCollection Date: 2025-01-01DOI: 10.1590/0103-644020256063
Daniele Manhaes-Caldas, Matheus L Oliveira, Francisco Carlos Groppo, Dagmar de Paula Queluz
{"title":"Sex estimation accuracy through metric evaluation of dental root: a cone-beam computed tomography-based study.","authors":"Daniele Manhaes-Caldas, Matheus L Oliveira, Francisco Carlos Groppo, Dagmar de Paula Queluz","doi":"10.1590/0103-644020256063","DOIUrl":"10.1590/0103-644020256063","url":null,"abstract":"<p><p>The degree of sexual dimorphism exhibited by teeth plays a crucial role in sex estimation, particularly as they are frequently found well-preserved. This study aimed to assess the presence of sexual dimorphism in the roots of upper lateral incisors, upper canines, and lower canines using cone-beam computed tomography (CBCT), and to develop and validate a formula for sex estimation. Linear measurements, surface area, and volumetric measurements were conducted on a total of 140 CBCT volumes (100 for evaluation and 40 for validation) from a Brazilian population, with an equal distribution of sexes, aged between 18 and 50. Statistical analysis involved the Kolmogorov-Smirnov test, unpaired t-test with Welch correction, Pearson's correlation test, logistic regression using the Backward Stepwise method, sieve test, Kappa test, intraclass correlation coefficient, and statistical power calculation (α=0.05). The three teeth showed sexual dimorphism, with measurements from males being statistically larger. Notably, only the formulas for the lower canine met the Mohan and Daubert admissibility criteria. The formula for assessing a sound root used included the mesiodistal diameter, axial cross-section volume, and two-thirds of the coronal cross-section volume. For evaluating reduced root length, the formula incorporated the mesiodistal diameter and axial cross-section volume. The accuracy of the lower canine formulas for sound and reduced root length were 89% and 87%, respectively. After validation, both formulas achieved an accuracy of 85%. In conclusion, the models combining measurements from the lower canine can be applied as a complementary method for sex estimation.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"36 ","pages":"e246063"},"PeriodicalIF":0.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143805231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2025-04-07eCollection Date: 2025-01-01DOI: 10.1590/0103-644020256074
Paula Fernandes-E-Silva, Marcieli Dias Furtado, Adriana Fernandes da Silva, Evandro Piva, Noéli Boscato, Wellington Luiz de Oliveira da Rosa
{"title":"Influence of depth and translucency on the color matching of single-shade resin composites: An in vitro study.","authors":"Paula Fernandes-E-Silva, Marcieli Dias Furtado, Adriana Fernandes da Silva, Evandro Piva, Noéli Boscato, Wellington Luiz de Oliveira da Rosa","doi":"10.1590/0103-644020256074","DOIUrl":"10.1590/0103-644020256074","url":null,"abstract":"<p><p>To evaluate whether the depth and translucency of the restoration influence the color matching of single-color resin composites, cylindrical cavities (2-and-4 mm depths) were prepared in acrylic teeth 62 shade (n=10). Restorations were performed with single-shade resin composites (OC: Omnichroma, Tokuyama; VU: Vittra APS Unique, FGM) and a control multi-shade (EO: Estelite Omega, Tokuyama). The color matching was measured in instrumental analysis (CIEDE2000 color difference formula (ΔE00)) and visual analysis (0 to 4 scale). The translucency of discs (2-and-4mm thickness) was obtained by color difference (ΔE00) between black and white background. Two-way ANOVA followed by the post-hoc Tukey's test was used to evaluate instrumental analysis, and Kruskal-Wallis followed by the post-hoc Tukey's test to evaluate color matching with a significance level of 5%. Restoration depths affected the ΔE00 values of OC and VU (p<0.05) (higher ΔE00 values for 4-mm depth and higher for OC and VU (p< 0.05)). The restoration depths did not influence the color matching in the visual analysis. VU and OC showed higher translucency scores than EO. At 2 mm, OC showed higher translucency values and there was no difference between OC and VU at 4 mm (p <0.05). The color matching of OC and VU was influenced by depth (instrumental analysis). While the OC had a similar color matching to EO at both depths, VU had the best color matching in both depths in the visual analysis. Single-shade materials had greater translucency than EO at different depths, and the translucency decreased with increasing depth.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"36 ","pages":"e246074"},"PeriodicalIF":0.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143805265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brazilian dental journalPub Date : 2024-12-16eCollection Date: 2024-01-01DOI: 10.1590/0103-644020246005
Gabriele Soares Maydana, Vitor Henrique Digmayer Romero, Cacia Signori, Juliana Lays Stolfo Uehara, Françoise Hélène van de Sande, Maximiliano Sérgio Cenci, Anelise Fernandes Montagner
{"title":"Impact of using bitewing radiographs alone or in combination with clinical information on treatment decisions.","authors":"Gabriele Soares Maydana, Vitor Henrique Digmayer Romero, Cacia Signori, Juliana Lays Stolfo Uehara, Françoise Hélène van de Sande, Maximiliano Sérgio Cenci, Anelise Fernandes Montagner","doi":"10.1590/0103-644020246005","DOIUrl":"10.1590/0103-644020246005","url":null,"abstract":"<p><p>The combination of different methods has been advocated to increase sensitivity in detecting secondary caries lesions. This cross-sectional study compared the detection of caries lesions around posterior restorations and treatment decisions using bitewing radiographs alone or in combination with clinical information from patient records. The radiographs (n = 212) were randomly distributed into two sequences for assessment across two phases, with a wash-out period of two weeks. In the first phase (X-ray group), the radiographic images were evaluated without clinical information; in the second phase (X-ray/CARS group), the radiographic images were assessed in conjunction with the CARS score (Caries Associated with Restorations or Sealants) and lesion activity. A radiographic classification system for carious lesions around restorations was adapted to classify the bitewing radiographs included in this study. Evaluations were conducted in consensus by a panel of specialists, focusing on the detection of caries around restorations and subsequent treatment decisions. A chi-squared test was used to compare treatment decisions between the groups, and Cohen's kappa coefficient was employed to assess the agreement of scores. The results showed a significant difference in the distribution of decisions regarding the need for restorative intervention between the groups (p < 0.001), with the X-ray/CARS group leading to more decisions favoring restorative intervention. There was a moderate to good agreement of scores (κ = 0.749). The combination of clinical and radiographic information was found to influence the treatment decision-making process by increasing the likelihood of opting for restorative intervention.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"e246005"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11654006/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857337","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 : 2024-12-16eCollection Date: 2024-01-01DOI: 10.1590/0103-644020246103
Fillipe Mendes Silva, Pedro Henrique Soares Aguiar, Helena Cristina de Assis, Fabiane Carneiro Lopes-Olhê, Jardel Francisco Mazzi-Chaves, Ricardo Gariba Silva, Antonio Miranda Cruz-Filho
{"title":"Evaluation of the bonding strength of conventional, anatomized, adjustable, and CAD/CAM milled fiberglass posts in weakened endodontically treated roots.","authors":"Fillipe Mendes Silva, Pedro Henrique Soares Aguiar, Helena Cristina de Assis, Fabiane Carneiro Lopes-Olhê, Jardel Francisco Mazzi-Chaves, Ricardo Gariba Silva, Antonio Miranda Cruz-Filho","doi":"10.1590/0103-644020246103","DOIUrl":"10.1590/0103-644020246103","url":null,"abstract":"<p><p>This study evaluated the bond strength (BS) of conventional, anatomized, adjustable, and CAD/CAM fiberglass post systems. Forty maxillary canine roots were weakened, endodontically treated, and divided into four groups (n=10). A slice from each of the three sections (cervical, middle, apical) of the root canal was subjected to the push-out test and the failure pattern was subsequently analyzed. The most apical slice was subjected to analysis of the cementation line thickness by scanning electron microscopy (SEM). Data regarding the BS and cementation line thickness were subjected to the Shapiro-Wilk normality test followed by the variance and Tukey tests. Data failure patterns were expressed as a percentage and submitted to the chi-square test. Conventional fiberglass posts had the lowest BD compared to the other fiberglass posts (p<0.05). All fiberglass posts exhibited a higher percentage of adhesive failures to dentin. The SEM demonstrated a thicker cementation line for the conventional post compared to the other groups (p<0.05), as well as gaps and voids in the cementing material. The anatomized, adjustable, and CAD/CAM milled fiberglass post systems demonstrated a superior BS and adaptation to the root dentin compared to the conventional fiberglass post.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"e246103"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11654010/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857325","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 : 2024-12-16eCollection Date: 2024-01-01DOI: 10.1590/0103-644020246104
Renata Ximenes Lins, Fernanda Santos Freitas, Ana Carolina Paulo Vicente
{"title":"Diversity of Endodontic Enterococcus faecalis from Brazil with a High Occurrence of the ST 397 Clone.","authors":"Renata Ximenes Lins, Fernanda Santos Freitas, Ana Carolina Paulo Vicente","doi":"10.1590/0103-644020246104","DOIUrl":"10.1590/0103-644020246104","url":null,"abstract":"<p><p>Enterococcus faecalis is a common cause of nosocomial infections and is frequently associated with endodontic infections. However, there is a scarcity of studies addressing the genetic characterization of E. faecalis lineages most commonly associated with root canals. The aim of this study was to assess the genetic relatedness of E. faecalis strains from primary endodontic infections in Southeast Brazil, test the hypothesis of clones infecting unrelated individuals, and examine the antimicrobial resistance profile. The genetic relationship of 32 endodontic E. faecalis isolates was investigated using multilocus sequence typing (MLST). These isolates were collected from unrelated patients with primary endodontic infections treated in Brazil between 2010 and 2023. Antimicrobial susceptibility testing was performed using the disk diffusion method in accordance with the Clinical Laboratory Standards Institute guidelines. Twelve sequence types (STs) were detected, of which eight STs contained only a single strain. Clones of ST 30, ST 40, ST 97, and ST 397 were identified, with a notably high frequency of ST 397 (15/32). Susceptibility to the antimicrobial agents tested varied, with the highest resistance rates observed for clindamycin (100%), tetracycline (34.4%), azithromycin (31.2%), and ciprofloxacin (19.2%). One isolate was found to be multidrug-resistant. MLST analysis of endodontic E. faecalis revealed clones infecting different individuals in various cities over a span of up to 10 years, with a high occurrence of ST 397. Therefore, there appears to be a predominant E. faecalis lineage associated with endodontic infections in Southeast Brazil. These findings, together with existing literature, raise concerns that certain lineages may be specialized in causing endodontic infections.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"e246104"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11653992/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857020","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 : 2024-12-16eCollection Date: 2024-01-01DOI: 10.1590/0103-644020246083
Erica Feleti Lorençon Dettogne, Kênia Maria Pereira Soares de Toubes, Luis Fernando Dos Santos Alves Morgan, Paulo Isaías Seraidarian, Lucas Moreira Maia, Frank Ferreira Silveira
{"title":"Comparative finite element analyses of stress exerted on the dentin by intraradicular posts.","authors":"Erica Feleti Lorençon Dettogne, Kênia Maria Pereira Soares de Toubes, Luis Fernando Dos Santos Alves Morgan, Paulo Isaías Seraidarian, Lucas Moreira Maia, Frank Ferreira Silveira","doi":"10.1590/0103-644020246083","DOIUrl":"10.1590/0103-644020246083","url":null,"abstract":"<p><p>The amount of residual dentin thickness and tooth position in the dental arch is crucial to determine whether an intraradicular post should be used. This study aimed to compare stress distribution on the root dentin of an endodontically treated tooth rehabilitated with CAD/CAM milled glass fiber posts (MP), cast metal posts (CMP), or prefabricated posts (PP) with or without ferrule support, using the finite element method.</p><p><strong>Materials and methods: </strong>A human upper central incisor was selected, scanned, and treated endodontically. The canal was then prepared for post-placement and scanned again for the fabrication of digital posts. The geometries of MP and CMP were based on the measurements made by digital scanning of the root canal. In contrast, the geometry of PP was determined by technical drawings provided by the manufacturer, taking into account the post-space preparation and the cement. Six digital models were established: MP1 with ferrule support, MP2 without ferrule support; CMP1 with ferrule support, CMP2 without ferrule support; PP1 with ferrule support, and PP2 without ferrule support. The simulation was performed using the finite element method.</p><p><strong>Results: </strong>Oblique forces were identified as more relevant to the metallic element compared to vertical forces. The presence of a ferrule was considered a protective factor for the remaining tooth structure. When the ferrule was absent, stresses were more evenly distributed in MP compared to CMP and PP. Posts with a higher modulus of elasticity were associated with higher and unequal stresses in the root dentin, which could predispose the tooth to fractures.</p><p><strong>Conclusions: </strong>As for the restoration set as a whole, it can be concluded that stress distribution on the root dentin was more evenly distributed on the milled post than on the other posts when a ferrule was absent, and the oblique forces were more detrimental to the tooth structure than vertical forces and that ferrule support was a protective factor for the remaining tooth structure.</p><p><strong>Clinical significance: </strong>The results of the study provide valuable information on how different types of intraradicular posts and the presence of a ferrule affect the stress distribution in dentin. In the absence of a ferrule, milled and customized computer-aided design/computer-aided manufacturing (CAD/CAM) glass fiber posts can exhibit better fracture resistance and adhesion strength than prefabricated fiberglass posts and metal posts.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"e246083"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11654013/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857021","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 : 2024-12-16eCollection Date: 2024-01-01DOI: 10.1590/0103-644020246091
Lucas Saldanha da Rosa, Luiza Freitas Brum Souza, Gratcheva Falcão Chiapinotto, Telma de Souza Pires, Amanda Maria de Oliveira Dal Piva, Cornelis Johannes Kleverlaan, Gabriel Kalil Rocha Pereira
{"title":"A comprehensive study on MDP effects: Microshear bond strength and fatigue resistance in 4YSZ ceramics.","authors":"Lucas Saldanha da Rosa, Luiza Freitas Brum Souza, Gratcheva Falcão Chiapinotto, Telma de Souza Pires, Amanda Maria de Oliveira Dal Piva, Cornelis Johannes Kleverlaan, Gabriel Kalil Rocha Pereira","doi":"10.1590/0103-644020246091","DOIUrl":"10.1590/0103-644020246091","url":null,"abstract":"<p><p>The aim of this study is to assess the presence of MDP at various stages of the bonding procedure, enhance the adhesive and mechanical behavior of cemented zirconia ceramics. Fifty ceramic slices (15 × 15 × 2 mm) and 48 discs (Ø= 10 mm, 1 mm thickness) were prepared, sintered, air-abraded with aluminum oxide, and allocated considering: 1) microshear bond strength (µSBS) between ceramic slices and luting agent cylinders (height= 1 mm, Ø= 1.2 mm); 2) fatigue behavior, ceramic discs paired and bonded onto fiber-epoxy resin discs (Ø= 10 mm, 2.5 mm thickness), and then mechanically tested (cyclic loading, starting at 400N, with increments of 100N, until failure). Four experimental groups were defined: Universal Primer (MDP primer+non-MDP resin cement - RC), Universal Adhesive (MDP adhesive+non-MDP RC), Cement (no primer+MDP RC), and Primer+Cement (MDP primer + MDP RC). For both outcomes, half of the specimens were tested after 24 hours, and half after aging. Bond strength data was analyzed via two-way ANOVA and Tukey post-hoc tests, while fatigue data went through Kaplan-Meier and Mantel-Cox post hoc tests. Regarding µSBS, aging impaired adhesion only for the Primer+Cement group (p<0.001). Universal Primer and Universal Adhesive showed the highest bond strength (p<0.05). Despite that, fatigue data indicates no significant differences (p>0.05). In conclusion, systems with MDP-containing components associated with non-MDP resin cement demonstrated enhanced adhesive capability for zirconia restorations. Nevertheless, no differences in terms of mechanical reinforcement were observed.</p>","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"e246091"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11654019/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857518","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}