Contrary to previous studies, we found that OSA patients may experience more apneic events if they sleep with their dentures in place. Specifically, in mild OSAS patients, the use of dentures substantially increases the AHI especially when in the supine position.

One obstacle to placing artificial posterior teeth in manufacturing complete dentures is a reduction of the space between the maxilla and the mandible. Occasionally, second molar placement is not performed, as it does not affect aesthetics, phonetics or comfort. The aim of this study was to compare the masticatory efficiency between patients wearing maxillary and mandibular complete dentures with reduced dental arches (without second molars) (WSM) and with full dental arches (FDA). Twenty subjects were divided into two groups and randomly received new complete dentures. Patients in Group 1 were given dentures WSM, and those in Group 2 were given dentures with FDA. After the post-placement visits, an initial masticatory efficiency test was performed with Optocal, an artificial test food. Fifteen days later, second molars were placed in Group 1 and removed from Group 2, and a new test was performed. Comminuted material was treated and sieved under vibration. The mean and standard deviation of masticatory efficiency with FDA were 10.4 and 8.1, respectively. In the tests WSM, the mean and standard deviation were 8.4 and 3.3, respectively. After removing the second molars in Group 2 and adding them in Group 1, the mean and standard deviation were 15.7 and 14.7 for Group 1 and 12.5 and 10.4 for Group 2, respectively. Within the limitations of this study, placing artificial teeth up to the first molars can be performed when needed without compromising masticatory efficiency.

According to the results, there were no differences (p < 0.05) in the masticatory efficiency of the complete denture sets using teeth with the two cusp heights.

Epidermolysis bullosa occurs in all races worldwide and not differ on incidence between the genders. It is a very rare disease and its occurrence in the population is not known precisely, but it is estimated that the prevalence of dystrophic form is between one case in every 20,000 to 130,000 people and the way acquired a case for 1.3 million people. According to epidemiological data from the United States, there are 50 cases of epidermolysis bullosa 1,000,000 live births. The present study is an attempt to rehabilitate the patient's dentition in question through two hybrid dentures supported on the teeth using a non-invasive treatment and in an efficient manner. Case Report, CF patient, 42 years old, male, white, attended the clinic specialized in prosthodontics University Center North Paulista (UNORP) due to their need for oral rehabilitation. In discussion, by treating able to improve masticatory function, besides the same show already be accustomed to the use of hearing aids without appearance of lesions or blisters and very satisfied with the aesthetic result, increasing their self-esteem. In conclusion, the rehabilitation by means of two hybrid supported denture on teeth has been successfully performed via a non-invasive and efficient treatment.

| Objective:Hardness is an indicator of several mechanical properties of artificial teeth, also related to wear resistance.The purpose of this article is to map the microhardness of artificial teeth as a function of depth and commercial brand. Methods: Knoop microhardness of sectioned artificial second molars was measured every 200 µm starting at a depth of 100 µm up until 4700 µm of the following brands: Premium (Pr), Orthosit (Or), SR Postaris DCL (Po), Biotone (Bi), Artiplus IPN (Ar), VITA MFT (Vi), Natusdent (Na), Trilux (Tr), and Biolux (Bx). Results were analyzed with ANOVA for repeated measures and Tukey test (5%). Results: SR Orthosit PE commercial brand presented higher hardness values (until the depth of 3.1 mm was 30 N/mm 2 ), significantly higher than the other brands analyzed. Conclusion: Knoop hardness did not present differences between layers for eight of the nine brands studied. Different hardness values were found between superficial and cervical areas for the brand SR Orthosit PE.DESCRIPTORS | Artificial Tooth; Hardness; Acrylic Resins. RESUMO | Microdureza de dentes artificiais em suas diferentes camadas • Objetivo:A dureza é tida como indicador de várias propriedades mecânicas de dentes artificiais, e relacionada a resistência ao desgaste. O objetivo foi mapear a microdureza de dentes artificiais de 9 marcas em função da profundidade. Métodos: foi medida a microdureza Knoop de segundos molares cortados num plano sagital em intervalos de 200 µm a partir da profundidade de 100 µm até 4700 µm, das marcas: Premium (Pr), Orthosit (Or), SR Postaris DCL (Po), Biotone (Bi), Artiplus IPN (Ar), VITA MFT (Vi), Natusdent (Na), Trilux (Tr) and Biolux (Bx). A ANOVA de medidas repetidas e o teste de Tukey (5%) analisaram os resultados. Resultados: A marca SR Orthosit PE apresentou a maior dureza (até a profundidade de 3,1 mm foi da ordem de 30 N/mm 2 ), significativamente maior que todas as outras medidas realizadas (da ordem de 20 N/mm 2 ). Conclusão: A dureza Knoop não evidenciou diferenças entre camadas para oito das nove marcas estudadas. Foi constatada diferente dureza entre a superfície e a região cervical para a marca SR Orthosit PE. DESCRITORES |

Introdução: A manutenção da higiene das próteses é de grande importância para a saúde de seus usuários. O objetivo deste trabalho é avaliar a influência do ácido acético na eficiência da higienização de próteses totais. Métodos: Para o estudo caso-controle, vinte e seis usuários de próteses totais foram selecionados em casas de repouso em São Paulo. Os grupos receberam instruções sobre higiene das próteses totais, sendo o grupo-controle instruído a deixá-las imersas em água durante a noite e o caso instruído a deixá-las imersas em vinagre pelo mesmo período. Nenhum paciente foi informado sobre o tipo de líquido utilizado. Resultados e Conclusão: Como resultado, obteve-se uma redução de placa no grupo estudado de 49% enquanto no grupo-controle houve um aumento de 4%. Assim, é possível afirmar a eficácia do ácido acético na melhora da higienização de próteses totais.

There is no evidence based in the literature about complete denture use during sleep, only some evidences about denture stomatits association and the change in apneic events. The goal of this randomized clinical study was to asses if the complete denture wear during sleep influence apneic events and quality of sleep. Elderly edentulous Obstructive Sleep Apnea Syndrome (OSAS) patients from a complete denture clinic were enrolled and received new complete dentures. The oral condition was evaluated according to bone resorption and Mallampati exam. The sleep quality was assed by the Pittsburgh Sleep Quality Index, the Epworth Sleepiness Scale and the polysomnographys were performed at the sleep laboratory for the patients sleeping with and without dentures the dentures. Twenty-three patients were evaluated with mean age 69.6 (SD±5.1) years and 74% female. In the mild (5≤AHI<30) OSAS group the apnea-hypopnea index decreased significantly when patients slept without dentures (8.9±2.4) compared when patients slept with the dentures (16.6±6.9). In a separated analysis, mild group in supine position presented a mean apnea-hypopnea index significant lower when patients slept without dentures from 12.7 (SD ± 8.4) to 51.9 (SD ± 28.6) sleeping with dentures. There was no significant difference in moderate to severe patients' variables. This study shows that mild OSAS edentulous patients had a lower apnea-hypopnea index when sleeping without dentures in supine position.

Dentition with severe wear in patients stricken by bruxism is a challenge due to loss of dental structure and occlusal vertical dimension and the temporomandibular implications. Bruxism is presented as a contraindication in cases of dental implants. This systematic review was carried out by examining the electronic literature available at PubMed and Google Scholar from 2010 to 2020 in Portuguese, English and Spanish languages. The review details the relationship between bruxism and dental implant failure in contrast to temporomandibular disorders, presenting the following conclusions: a) bruxism is a contributing factor to the occurrence of technical / biological complications of the dental implant and plays an important role in the failure of the dental implant; b) the anamnesis must be detailed to confirm sleep or day bruxism; c) the control of bruxism through the use of occlusal stabilization device may provide relief in the implants region and it is highly recommended. The aim of this literature review was to summarize the influences of different potential risk factors on the incidence of late dental implant failure. The protocol for this systematic review was prepared and implemented based on PRISMA guideline – Preferred Reporting Items for Systematic Reviews and Meta-Analyses.