Can a dentin bonding agent prevent color change in regenerative endodontic procedures? An in vitro evaluation.

This in vitro study aimed to determine the efficacy of dentin bonding agents in preventing color changes following Regenerative Endodontic Procedures. One hundred twenty bovine incisors were endodontically prepared and randomly assigned to a two main factors design: application of a dentin bonding agent (Scotchbond Adper, 3M ESPE, St Paul, MN, USA) in the pulp chamber (Group 1, n=60) versus no bonding intervention (Group 2, n=60), and five levels of intracanal medication (n=12/subgroup): Triple antibiotic paste (TAP), double antibiotic paste (DAB), calcium hydroxide (CH), modified triple antibiotic paste (TAPM), and Control (CTL). Color changes were measured over 28 days at multiple time points (1, 3, 7, 14, 21, and 28 days) using the CIEDE2000 formula to calculate the color difference (ΔE00) from baseline (T0). The ΔE00 quantifies the perceptible color difference between the initial and final tooth color, with lower values indicating less discoloration. The results were analyzed using repeated measures ANOVA-2 and post-hoc Holm-Sidak tests. The TAP subgroups, both with and without the bonding agent, exhibited the highest color variation. However, a pulp chamber seal with a bonding agent showed a protective effect against discoloration compared to no seal, even though complete prevention was not achieved. All groups demonstrated ΔE00 values beyond acceptable interpretation thresholds for clinical application, primarily driven by a reduction in lightness (L*) and a decrease in redness (a* value, shifting towards green). In conclusion, while the pulp chamber seal with a bonding agent mitigated TAP-induced discoloration, it did not eliminate it.

Detection of caries around restorations on bitewings using deep learning.

OBJECTIVE: Secondary caries lesions adjacent to restorations, a leading cause of restoration failure, require accurate diagnostic methods to ensure an optimal treatment outcome. Traditional diagnostic strategies rely on visual inspection complemented by radiographs. Recent advancements in artificial intelligence (AI), particularly deep learning, provide potential improvements in caries detection. This study aimed to develop a convolutional neural network (CNN)-based algorithm for detecting primary caries and secondary caries around restorations using bitewings. METHODS: Clinical data from 7 general dental practices in the Netherlands, comprising 425 bitewings of 383 patients, were utilized. The study used the Mask-RCNN architecture, for instance, segmentation, supported by the Swin Transformer backbone. After data augmentation, model training was performed through a ten-fold cross-validation. The diagnostic accuracy of the algorithm was evaluated by calculating the area under the Free-Response Receiver Operating Characteristics curve, sensitivity, precision, and F1 scores. RESULTS: The model achieved areas under FROC curves of 0.806 and 0.804, and F1-scores of 0.689 and 0.719 for primary and secondary caries detection, respectively. CONCLUSION: An accurate CNN-based automated system was developed to detect primary and secondary caries lesions on bitewings, highlighting a significant advancement in automated caries diagnostics. CLINICAL SIGNIFICANCE: An accurate algorithm that integrates the detection of both primary and secondary caries will permit the development of automated systems to aid clinicians in their daily clinical practice.

Full analysis of the effects of modeler liquids on the properties of direct resin-based composites: a meta-analysis review of in vitro studies.

OBJECTIVES: This study systematically revised the literature to answer the following question: do modeler liquids (MLs) affect the properties of direct resin-based composites (RBCs)? MATERIALS AND METHODS: The review followed the PRISMA statement, and the search was conducted in PubMed, Scopus, Web of Science, Embase, and Lilacs databases. Studies were included if they investigated the properties of RBCs prepared using the restorative dental modeling insertion technique (RDMIT). The risk of bias was performed with the RoBDEMAT tool. Statistical analyses were conducted using Review Manager, and heterogeneity was assessed with the Cochran Q test and I2 statistics. RESULTS: From 309 studies identified, 25 met the eligibility criteria, and 23 were meta-analyzed. In total, 27 MLs and 23 RBCs were evaluated. Modeled and non-modeled RBCs showed similar results in terms of cohesive strength, flexural strength, load-to-fracture, modulus of elasticity, work of fracture, degree of conversion, solubility, weight change, microhardness, and color change. Sorption and roughness benefited from the use of MLs, whereas translucency and whitening index were more adequate in the non-modeled RBCs. Aging affected similarly the modeled and non-modeled RBCs. Most studies showed a moderate risk of bias. CONCLUSIONS: Modeled and non-modeled RBCs performed similarly in most of the properties, and the use of non-solvated lubricants offered beneficial effects in some cases. CLINICAL RELEVANCE: When a balance has to be made between the RDMIT and the conventional technique, our review supports the safe application of modeler liquids for the handling of composite increments during the sculpting fabrication of direct resin-based restorations.

O emprego da rede social Instagram com foco na apresentação de Trabalhos de Conclusão de Curso / El uso de la red social Instagram con foco en la presentación de Trabajos de Fin de Curso / Use of the social network Instagram focused on the presentation of Course Completion Monographs

Relata-se a experiência de utilização da plataforma Instagramna criação e disseminação de conhecimento com foco na apresentação de Trabalhos de Conclusão de Curso (TCC) por acadêmicos de graduação em Odontologia. Foi realizado um relato descritivo da veiculação de conteúdo na rede social Instagram, por meio do perfil @powerpoint.tcc. O conteúdo foi produzido por uma acadêmica de graduação em Odontologia, com o apoio de discentes e docentes envolvidos em apresentações científicas e acadêmicas. Foram realizadas postagens frequentes abordando diversas temáticas relacionadas ao tema apresentação de TCC. Foram elaborados materiais variados em formato de posts, destacando-se o uso do softwarePowerPoint para a criação de apresentações; oratória, postura e linguagem; além de informações sobre apresentação de dados de forma atrativa e interessante. Os formatos das postagens realizadas foram aqueles disponíveis na plataforma Instagram: postsno feed, reels, story, vídeos no IGTV, além de livesda própria conta ou em contas parceiras. A periodicidade das postagens temáticas foide pelo menos uma a cada dois dias. A avaliação de alcance e entrega do conteúdo foi obtida por meio das métricas disponibilizadas no próprio aplicativo da rede social. Observou-se grande interesse sobre a temática abordada, uma vez que as apresentações científicas e acadêmicas são habituais para os acadêmicos de graduação. Conclui-se que a experiência prática de utilização da plataforma Instagrampara criação e transmissão de conhecimentos com foco nos TCCs mostrou-se extremamente promissora e propositiva (AU).

Se relata la experiencia del uso de la plataforma Instagram en la creación y difusión de conocimiento, con foco en la presentación de Trabajos de Fin de Curso (TFC) por parte de estudiantes de pregrado en Odontología. Se realizó un relato descriptivo de la colocación de contenidos en la red social Instagram, a través del perfil @powerpoint.tcc. El contenido fue producido por un estudiante de pregrado en Odontología, con el apoyo de estudiantes y profesores involucrados en presentaciones científicas y académicas. Se realizaron publicaciones frecuentes abordando diversos temas relacionados con el tema presentación de TFC. Se prepararon diversos materiales en forma de post, destacándose el uso del software PowerPoint para la creación de presentaciones; oratoria, postura y lenguaje; así como información sobre cómo presentar los datos de forma atractiva e interesante. Los formatos de las publicaciones realizadas fueron los disponibles en la plataforma de Instagram: publicaciones en el feed, reels, story, videos en IGTV, además de live en la propia cuenta o en cuentas de compañeros. La frecuencia de publicaciones temáticas fue de al menos una cada dos días. La evaluación del alcance y entrega del contenido se obtuvo a través de las métricas disponibles en la propia aplicación de la red social. Hubo gran interés en el tema abordado, ya que las presentaciones científicas y académicas son comunes para los estudiantes de pregrado. Se concluye que la experiencia práctica del uso de la plataforma Instagram para la creación y transmisión de conocimiento con enfoque en el TFC demostró ser sumamente promisoria y propositiva (AU).

The experience of using the Instagram platform for creation and dissemination of knowledge is reported, focusing on the presentation of Course Completion Monographs (TCC) by undergraduate dental students. A descriptive report of the diffusion of content on the social network Instagram was performed, on the profile @powerpoint.tcc. The content was produced by an undergraduate dental student, with the support of students and professors involved in scientific and academic presentations. Frequent posts were made addressing several topics related to the presentation of TCC. Several materials were prepared in the form of posts, highlighting the use of PowerPoint software to create presentations; speech, posture and language; as well as information on presenting data in an attractive and interesting manner. The formats of posts were those available on the Instagram platform: feed posts, reels, story, videos on IGTV, besides lives on the account or partner accounts. The frequency of thematic posts was at least one at every two days. The evaluation of content reach and delivery was achieved by the metrics available in the social network application. There was great interest in the topic addressed, since scientific and academic presentations are common for undergraduate students. It was concluded that the practical experience of using the Instagram platform for creating and transmitting knowledge focused on TCCs proved to be extremely promising and purposeful (AU).

Surface Treatments and Adhesives Used to Increase the Bond Strength Between Polyetheretherketone and Resin-based Dental Materials: A Scoping Review.

PURPOSE: To identify and discuss the available surface treatments and adhesives for polyetheretherketone (PEEK) to increase its bond strength to resin-based materials used in dentistry. MATERIALS AND METHODS: The reporting of this scoping review was based on PRISMA. The study protocol was made available at: https://osf.io/4nur9/. Studies which evaluated PEEK surface treatments and its bond strength to resin-based materials were selected. The search was performed in PubMed, Scopus, Web of Sciences and Cochrane databases. The screening was undertaken by 3 independent researchers using the Rayyan program. A descriptive analysis was performed considering study characteristics and main findings (title, data of publication, authors, PEEK characteristics, surface treatments, control group, bonded set, luting agent, specimen geometry, storage, thermocycling, pre-test failures, test geometry, failure analysis, main findings, and compliance with normative guidelines). RESULTS: The initial search yielded 1965 articles, of which 32 were included for descriptive analysis. The review showed that the use of surface treatments and adhesives are important to promote bond strength to PEEK. Up until now, various surface treatments have been explored for bond improvement to PEEK. Sulfuric acid etching is commonly reported as promoting the highest bond strength, followed by alumina-particle air abrasion. Regarding adhesives, the use of a specific adhesive containing MMA, PETIA (pentaerythritol triacrylate), and dimethacrylates yields the best adhesive performance. CONCLUSION: Sulfuric acid etching and alumina particle air abrasion followed by application of bonding agents containing MMA, PETIA and dimethacrylates are the most effective choices to increase resin-based materials' adhesion to PEEK.

Avaliação dos egressos do Programa de EducaçãoTutorial (PET) docurso de Odontologia da Universidade Federal de Pelotas / Evaluation of graduates of the Tutorial Education Program (PET) of the Dentistry Course at the Federal University of Pelotas

O objetivo desse trabalho foi avaliar o perfil profissional dos egressos da Faculdade de Odontologia da Universidade Federal de Pelotas,participantes do Programa de Educação Tutorial (PET). Foi realizada uma pesquisa descritiva, de natureza qualitativa e quantitativa, utilizando um questionário eletrônico estruturado eautoaplicável como instrumento de coleta e enviado, via correspondência eletrônica, à todos os egressos que participaram efetivamente do grupo PET e aceitaram participar desta pesquisa. Atividade profissional, níveis de formação e objetivos propostos pelo programa foram avaliados. O total de egressos foi de 89, desde a criação do grupo, em 1992, até o ano de 2019. Com as respostas obtidas (n=59), verificou-se que maior parte dos egressos que aderiram a pesquisa concluíram o curso entre os anos de 2004 até 2018 (59.3%), e apenas 24 (40.6%) em período anterior a 2004. Verificou-se que 25% atuam no serviço público, 44% no setor privado e 22% atuam em ambos. Em relaçãoàtitulação, apenas 4(6,8%)não possuem nenhuma pós-graduação, e 53 (89.8%) atuam na regiãoSul do país, 36 (61%) sãodo sexo feminino e 23 (39%) do masculino. Ao final do questionário, foi perguntado arespeito da influência da participação no Programasobre a trajetória profissional, com uma escala de intensidade progressiva de 1 a 5, gerando 19 respostas com nível 4 e 39respostas com nível 5. Os resultados evidenciaram uma influência muito positiva da participação no Programa na vida profissional de seus ex-participantes, tanto no mercado de trabalho, quanto na vivência de pós-graduação (AU).

This study evaluated the professional profile of graduates of the School of Dentistry at the Federal University of Pelotas, participants of the Tutorial Education Program (PET). A descriptive research was conducted, of qualitative and quantitative nature, using a structured and self-administered electronic questionnaire as collection instrument, sent by email to all graduates who effectively participated in the PET group and agreed to participate in this study. The study assessed the professional activity, traininglevels and objectives proposed by the program. The total number of graduates was 89, since the group was created in 1992 until 2019. The answers obtained (n=59) revealed that most graduates who joined the survey completed the course between the years 2004to 2018 (59.3%), and only 24 (40.6%) in the period before 2004. It was found that 25% work in public services, 44% in the private sector and 22% work in both. Concerning the degree, only 4 (6.8%) did not attend postgraduation education, and 53 (89.8%) work in the Southern region of the country, 36 (61%) are females and 23 (39%) are males. At completion of the questionnaire, the participants were asked about the influence of participation in the Program on their professional career, with a scale of progressive intensity from 1 to 5, retrieving 19 responses with score 4 and 39 responses with score 5. The results evidenced a positive influence from participation in the Program in the professional lives of former participants, both in the job market and in the postgraduation experience (AU).