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Objective: To evaluate the presence of sequelae in primary teeth and their permanent successors, as well as associations between TDI and the presence of sequelae in both teeth. Material and Methods: In this 14-year retrospective study, 2.290 records were reviewed, 192 patients who suffered dental trauma in primary teeth were followed until the eruption of successor teeth were included. Descriptive, chi-square, and regression logistic with generalized estimating equations tests were performed (p<0.05). Results: 362 primary and successor teeth were followed. Sequelae were present in 71.8% of primary teeth and 25.7% of their successors. Teeth with complicated fracture (100%), extrusion (100%) and avulsion (100%) resulted in the largest amounts of sequelae in primary teeth and intrusion (61%) on their successors. Age was associated with sequelae in permanent teeth (p<0.01). Extrusion (OR 10.06; CI 2.12-47.63) and intrusion (OR 7.51; CI 2.73- 20.70) had a higher risk to cause sequelae in primary and permanent teeth, respectively. Conclusion: The type of injury involved influenced the sequelae in traumatized teeth and their successors, and the age of the child influenced the presence of sequelae in permanent teeth. [ABSTRACT FROM AUTHOR]

Objective: To evaluate the quality of information about Molar incisor Hypomineralization (MIH) on YouTubeTM. Material and Methods: Only videos in Portuguese aimed at dentists were included. The selected videos were analyzed by two calibrated evaluators, who extracted the information (classification, etiology, diagnosis, and treatment of MIH) and the quality was evaluated through a 20-point-checklist, according to the International Association of Pediatric Dentistry and European Academy of Pediatric Dentistry. Descriptive analysis and statistical tests were applied to assess the association (ANOVA and Kruskal-Wallis) or correlation (Spearman) between the final scores of the videos and their demographics. Results: Nineteen videos with 13.8±4.76 mean points were considered eligible. Most of the videos did not report the possible involvement of other groups of teeth (n=12), presence of atypical restorations (n=8) and hypersensitivity (n=7); and the different treatments for MIH were very variable. Twelve videos discussed differential diagnosis and 78.95% possible etiological factors; however, all of them presented clinical images. Data related to the video source and viewer interaction were not related to its quality (p>0.05). The number of likes (r=0.26), views (r=0.34) and video time (=0.58) show a weak and moderate correlation, respectively, with video score. Conclusion: Videos on YouTubeTM about MIH presented moderate or high quality, with heterogeneous information, and can act as a complementary aid source of information. [ABSTRACT FROM AUTHOR]

Temporomandibular Joint Dysfunction (TMD) is an umbrella term that includes musculoskeletal and neuromuscular conditions affecting the temporomandibular joint. The present systematic review aimed to verify whether there is a specific association between TMD and anxiety. The searches were carried out in electronic databases, including PubMed, Scopus, Web of Science, and LILACS, without restrictions on publication date and language. The acronym PECO was used, whose participants (P) were humans exposed to TMD (E), compared to participants without TMD (C) and the presence of anxiety as an outcome (O). After the search retrieval, the duplicates were removed, and the articles were evaluated by title and abstract, following our inclusion and exclusion criteria; then, the papers were read and thoroughly assessed. After selection, the methodological quality was performed using the Newcastle-Ottawa Scale (NOS) for observational studies. The Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) tool was used to assess the level of evidence. A total of 710 studies were found, and 33 articles were considered eligible and were included for the qualitative synthesis and the level of evidence assessment. The studies confirmed the association between anxiety and DTM, although there was a low certainty of evidence among the selected studies. Most articles showed a low risk of bias. Although the limitations of this systematic review, it suggested a significant association between anxiety and TMD, as well as highlights possible directions for future research. [ABSTRACT FROM AUTHOR]

Purpose: To perform a systematic review of the clinical performance of a low polymerization shrinkage, siloranebased composite (SBC) compared with a methacrylate-based composite (MBC) in posterior restorations. Materials and Methods: Electronic databases were searched: PubMed, Scopus, Bireme, Science Direct, Web of Science, ClinicalTrials.gov and OpenGrey. The search strategy included MeSH terms, synonyms and keywords with no language or date restrictions. Reference lists of eligible studies were cross checked in an attempt to identify additional studies. Based on the PICOS strategy, only randomized clinical trials (RCTs) were included. The risk of bias in the included studies was assessed and classified through the Cochrane Collaboration common scheme for bias. Two meta-analyses were performed using RevMan software, one with all 11 studies and another that included only studies with over 24 months of follow-up, for the main parameters analyzed. Results: A total of 544 studies were identified. After removing duplicates and examinating titles and abstracts, 17 texts were selected and read in full. Six of them were excluded, so the final sample of this systematic review included 11 studies. Six of the 11 studies were classified as having a "low risk of bias" and five were "unclear". The heterogeneity (I2) in all parameters was not significant. The exclusion of studies with less than 24 months of follow- up did not change the final result of the meta-analysis: both SBC and MBC have satisfactory and statistically similar clinical performances. Conclusion: Low polymerization shrinkage is not the principal factor that determines the superiority of a resin. [ABSTRACT FROM AUTHOR]

Objective: To describe and evaluate the xylitol products’ applicability and its effects in the health area worldwide utilizing a bibliometric analysis from randomized controlled trials (RCT) with humans. Material and Methods: Electronic searches were carried out in Medline/PubMed, Scopus, Cochrane Library, Web of Science, and VHL databases. The main data extracted were: year, area of applicability, type of treatment, country, journal, xylitol posology and concentration, presentation form, outcomes, and effects. Results: From 1476 studies, 257 were included. These studies were published between 1973-2021. The majority was carried out in dentistry (73.9%) and under preventive treatment (67.4%). These studies were developed in the USA (15.4%) and published in Caries Research (6.6%). The posology and concentration ranged between 0.004-67 g/day and 0.002-100%, respectively. The xylitol is usually used in the chewing gum form (44.0%), and for antimicrobial activity evaluation (38.5%). A positive effect was observed in 204 studies (79.3%) and was associated with xylitol concentration ≥ 15% (p=0.007). Side effects were reported in 8.2% and were associated with posology ≥ 5 g/day (p=0.03). Conclusion: Most studies with xylitol were conducted to prevent diseases in the dentistry field. The chewing gum form and antimicrobial activity evaluation were more frequent. Most xylitol products have a positive effect, and few studies report side effects. [ABSTRACT FROM AUTHOR]

Objetivo: Avaliar a molhabilidade do cimento AH Plus em contato com a dentina radicular após diferentes protocolos quelantes envolvendo ácido etidrônico (HEBP) e o EDTA. Métodos: Cinquenta e seis fatias de dentina radicular foram utilizadas e irrigadas com 5.25% de hipoclorito de sódio (NaOCl) ou com uma mistura de 5.25%NaOCl/18%HEBP para simular a irrigação durante o preparo químico-mecânico. As amostras irrigadas com NaOCl foram divididas em 5 grupos, de acordo com o agente quelante: G1- água destilada (AD); G2-17%EDTA; G3-17%EDTA+2.5%NaOCl; G4-18%HEBP; e G5-18%HEBP+2.5%NaOCl. As amostras irrigadas com a mistura de NaOCl/HEBP foram dividias em 2 grupos: G6-AD; G7-NaOCl/HEBP+2.5%- NaOCl. Todos os protocolos receberam irrigação de AD entre as substâncias irrigadoras e como lavagem final. O goniômetro Rame-Hart foi utilizado para mesurar o ângulo de contato entre a superfície da dentina radicular e o cimento. O teste estatístico Kruskal-Wallis e Dunn foram aplicados (p<0.05). Resultados: Os grupos onde a smear layer foi removida apresentaram menor ângulo de contato (p<0.05), com exceção do G7. O G6 apresentou o menor ângulo de contato do AH Plus, entretanto, a irrigação final com NaOCl (G7) aumentou significativamente o ângulo de contato. G2 e G4 apresentaram comportamento similar e a irrigação final com NaOCL (G3 e G4) não modificou a molhabilidade da dentina. Conclusão: O tratamento da dentina radicular com a mistura NaOCl/HEBP, quando usada como irrigante, conferiu boa molhabilidade desta superfície ao cimento AH Plus. [ABSTRACT FROM AUTHOR]

Introduction: The objective of this study was to evaluate the influence of the instrumentation kinematics on endodontic postoperative pain. Methods and Materials: PubMed, Scopus, Web of Science, Lilacs, Cochrane Library and the System for Information on Gray Literature in Europe were searched electronically without time or language limitations up to June 2020. Subsequently, data extraction, quality assessment and meta-analysis were conducted. The meta-analysis was performed using random-effects inverse-variance methods, and heterogeneity was tested using the 12 index (P<0.05). Results: A total of 318 articles were successfully identified in the search. Sixteen studies were used in qualitative synthesis and fourteen used for quantitative synthesis. Meta-analysis showed that patients treated with reciprocating system had lower risk of pain 48 h after endodontic treatment (Risk ratio [RR]=1.04, 95% Confidence interval [CI]=1.01-1.06, P=0.003) (I²=0%), but the mean postoperative pain for the reciprocating system was greater 24 h post endodontic treatment (Standardized mean difference [SMD]=0.25, 95% CI=0.06 to 0.44, P=0.01) (I²=43%). Other time points presented similar rates of postoperative pain (P>0.05). The certainty of evidence ranges from very low to high. Conclusions: The rate of postoperative endodontic pain was low, and reciprocating systems evoked more pain within the 24 h interval. Overall, the incidence and level of postoperative pain did not vary between reciprocating and rotary systems. There is no consensus if there is a relationship between the kinematics (rotary and reciprocating) and the incidence of postoperative pain. [ABSTRACT FROM AUTHOR]

Objective: To evaluate the topography and microhardness of composite resin restorations submitted to different finishing and polishing systems before and after erosive challenge. Material and Methods: Thirty standardized cavities prepared in enamel-dentin blocks of bovine incisors were restored with Z350 composite resin, and randomly distributed into three groups (n=10) according to the finishing and polishing systems: G1 = Soflex 4 steps, G2 = Soflex Spiral 2 steps and G3 = PoGo (single step). The specimens were half protected with nail varnish and submitted to five immersions in Pepsi Twist®, for 10 minutes each, five times/day during six consecutive days. The initial and final challenge surface microhardness (SMHinitial and SMHfinal) of the composite resin was evaluated and the percentage of SMH loss (%SMHL) was calculated. After protection removal, the topographic change linear (Ra) and volumetric (Sa) roughness was evaluated in initial and final areas by using 3D non-contact optical profilometry and scanning electron microscopy (SEM). Data were analyzed by paired Student's t-test, Kruskal-Wallis test, and by ANOVA and Tukey's test. Results: There was significant intra-group %SMHL in composite resin (p<0.05). Differences among groups in %SMHL, Ra/Sa in resin composite were not observed (p>0.05). SEM images revealed structural changes between the initial and final surfaces for all groups. Conclusion: The three types of finishing and polishing systems had a similar influence on %SMHL, Ra and Sa in the nanofilled composite resin. [ABSTRACT FROM AUTHOR]

The article describes the applications of multivariate analysis techniques, factor analysis (FA) and/or principal component analysis (PCA) for orthodontists to better understand and visualize high-dimensional data. Topics covered include how FA is used in reducing the observed variables to a smaller number, the use of PCA in exploring data and the distinction of PCA from FA.