Objective: To determine the incidence of the main risk factors and also the prevalence of non-carious cervical lesions (NCCL) in relation to sex and age. Methodology: The literature search was conducted using the keywords and MeSH terms “Tooth Cervix”, “Non carious cervical lesions” and “Tooth Wear”, in the MEDLINE databases via PubMed and Scopus. Observational studies were included, which aimed to assess the relationship between sex, age and risk factors with cervical injuries. In addition, only studies in English, from the last five years, in their full version, were selected. Literature reviews, clinical cases, studies that did not include the main observation, studies that deviated from the topic and in other languages were excluded from the research. Results: 441 articles were identified, of which 17 were selected. There was no significant percentage difference between males and females, with percentages of 49% and 51%, respectively. Regarding the prevalence associated with the age group, a higher incidence was observed in the population over 65 years of age (36%). Regarding risk factors, gastroesophageal reflux, parafunctional habits, occlusal disorders and brushing problems were reported, but the acidic diet was the most incident in the literature (in 76.4% of the selected articles). Conclusion: The prevalence of NCCL increases with age, however it does not depend on sex, with an acidic diet being considered a risk factor.
Objective: the aim of this article was to review the literature about the marginal and internal fit of CAD/CAM fabricated all-ceramic restorations. Material and Methods: a review of literature using Pubmed and Bireme database was executed and 37 articles in English and Portuguese were selected. The keywords were "Computer-Aided Design," "Dental marginal adaptation," "Dental restoration, permanent." Results: the results proved that this system can generate restorations with clinically acceptable marginal fit (≤100 µm). However, other parameters must be considered to achieve these results such as milling machine, bur diameter, software, design preparation, smooth preparation margins and incorporation of rounded line angles on the tooth preparation, learning curve of the operator and type of impression method. Conclusion: therefore, although some clinicians present concerns related to the internal fit of CAD/CAM system fabricated restorations, studies corroborate the success on the fit of these restorations, which justifies clinical use and indication of CAD/CAM system.
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