Objetivo: Bio-Oss is a xenogene bone graft in which all organic components are removed while retaining their natural mineral architecture. Therefore, the aim of this study was to evaluate, through a literature review, the benefits of using Bio-Oss for tissue regenerative treatment prior to implant placement. Material and Methods: a search was performed in Pubmed (Medline) in order to identify articles published in English between January 1, 2000 and June 31, 2018, where the Bio-Oss graft was used prior to implantation of implants in humans. A total of 40 studies were selected for detailed analysis. From this analysis, 18 articles were identified for inclusion in this review. Results: the articles analyzed in the review showed several beneficial effects of this xenograft, such as: positive osteoconductive properties, recovery of bone heights at sites with severe atrophies, slow xenograft reabsorption suggesting long term stability, survival rates and success of implants placed in grafted sites ranging from 91 to 100% in several studies. Conclusion: the use of bio-oss as a bone substitute is a viable alternative in the placement before dental implants, being used in clinical practice and with proved efficacy in several studies, due to its similarity with the bone and its high level of osteoconductivity.KeywordsBio-Oss; Bone Graft; Implants.
Objective: This study aimed the synthesis and morphological characterization of PCL electrospun fibers containing tara extract. Material and Methods: For this, tara extract synthesis was performed by two different extraction methods: rotary evaporator and extractor soxhlet. Then, two solutions were prepared by dissolving 3g of PCL in 2mL of Acetone. The first solution used 0.4 mL tara extract obtained by RE and the second solution used 0.4 mL tara extract obtained by SE. After the solutions electrospinning, under different parameters, obtaining It was obtained the experimental groups: ChTa 1 nanofibers with RE extract, under 12 Kv; ChTa 2 nanofibers with RE extract, under 15 Kv; ChTa 3 nanofibers with ES extract, under 12Kv and ChTa 4 nanofibers with ES extract, under 15kV. Scanning electron micrographs were performed for morphological analysis. Results: Fiber formation was observed for all parameters. About the fiber diameter: ChTa 1 presented a mean of 0.82 ± 0.36μm, ChTa 2 1.232 ±0471μm, ChTa 3 1.469 ± 0.614μm and ChTa 4 1.017 ± 0.417. Also the beads formation was analyzed: ChTa 1 group presented 8 beads, ChTa 2 presented 5, ChTa 3 presented 30 and ChTa 4 presented 15 beads. Conclusion: It can be concluded that it is possible to obtain an effective synthesis of electrospun membranes of PCL and Caesalpinia spinosa extract, indicating a potential of therapeutic application for lesions such as prosthetic stomatitis.KeywordsCandidiasis; Nanofibers; Tannins.
Objective: The present study aims to describe a literature review on post and core restorations from a new clinical perspective in dentistry. Also, to define the best choice regarding the intraradicular retainer, material used, confection techniques and their possible failures, explaining the myths and the truths about them. Methodology: This literature review was conducted by leading health databases: Pubmed (https://www.ncbi.nlm.nih.gov/pubmed), SCIELO (www.scielo.org) e Google Scholar (https://scholar.google.com.br). The keywords for the textual search were: Denture, Partial, Fixed; Post and Core Technique; Dental Research; Dentistry. Inclusion criteria were: literature on the subject under study, literature of recent years, english and portuguese languages, laboratory and clinical studies, and systematic reviews. Literature Review: Post and core are defined as prosthetic elements that seek intraradicular retention to support prosthetic crowns or unitary restorations. The ideal shape of the intraradicular retainer should supplement the dental remnant, allowing the shape of a prepared tooth to receive a prosthetic crown. In conjunction of the dental remnant, they are responsible for dissipating and absorbing the forces developed during the chewing cycles, without deformation or damaging the minimal cement layer. Conclusion: The evolution of endodontic therapy enables a restoration with greater safety of treated teeth. However, it is necessary to consider the remaining dental structure, mainly because the posts do not provide reinforcement, only retention and resistance to the prosthetic crown.
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