Oral habits are customs acquired by the repetition of a series of events that serve to calm an emotional need. Early diagnosis of these anomalous habits is crucial to the early prevention or correction of malocclusions. The objective of the study is to determine the prevalence of malocclusion in school and its possible relationship with the nutritive and non-nutritive habits. Design: Cross-sectional study on 113 school children with ages between 3 and 8 years old. Surveys were carried out from parents related to nutritional habits and non-nutritive. Results: The prevalence of children with malocclusion class II is 34.5%, followed by overjet (33.6%), cross bite (10.6%), open bite (9.7%) and the habits of lip interposition (15%), lingual habit (11.5%) and oral breath (7.1%). There is a statistically significant relationship (p˂0, 05) between the habit of snoring at night with the overjet (p = 0, 001), also with class II molar (p = 0.037) and with oral breath (p = 0.016). Finally, there is a statistically significant relationship between prolonged bottle habit (p = 0.047) with the posterior crossbite. Conclusions: The habits of nutritive and non-nutritive sucking in the early stages of the childhood, may be a risk factor for the development of class II molar, increased overjet and posterior crossbite malocclusion.
Purpose: To compare the degrees of marginal microleakage undergone by different intermediate materials used for provisional restoration in indirect pulp treatment: glass ionomers (Ketac™ Fil Plus (3M ESPE), Ketac™ Molar Easy Mix (3M ESPE), Fuji IX™ GP (GC)) and zinc oxide eugenol. Materials and methods: Twenty young permanent premolars, extracted for orthodontic reasons, were prepared by creating Class II cavities and then divided into four groups according to the material used for pulp capping. The materials were applied following the manufacturers' instructions and stained with methylene blue at 2% to evaluate microleakage. Results: Results were evaluated applying variance analysis (ANOVA). It was found that glass ionomers showed better outcomes than zinc oxide eugenol, with Fuji IX™ GP and Ketac™ Molar Easy Mix producing the best results. Conclusion: For indirect pulp capping, glass ionomer is a favorable material for reducing one of the main causes of treatment failure-microleakagealthough there are differences between brands.
Background: This article will review different materials for the treatment of pulps of primary and young permanent teeth. However, innovations in materials and advances in biology suggest that there may soon be a convergence of therapies for teeth of either dentition needing pulp treatment. Objectives: The objective of this study was evaluated the pulp and liver response to biocompatible agents such as lyophilized bone in comparison with classical formocresol. Materials and Methods: Treatment was applied to the upper right and left first molar of each animal, for a total of 120 teeth. Six groups were established according to the agent used and the time elapsed (30, 45 and 60 days). In each group five livers were selected, and a control group subjected to no treatment was also evaluated. At the end of the study the rats were sacrificed and the samples were processed for histological evaluation. Analysis of variance (ANOVA) for repeated measures was used. Results: Dentinal bridge formation and reparative dentin reached higher values in the group treated with lyophilized bone. The formocresol treatment group showed increased inflammation and necrosis. Conclusions: Lyophilized bone afforded improved pulp tissue response. No histological evidence of liver damage was observed in any of the hepatic samples studied.
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