Browsing by Subject "Titanium"

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    Effect of photofunctionalization with 6 W or 85 W UVC on the degree of wettability of RBM titanium in relation to the irradiation time
    (MDPI, 2021-06-11) Sánchez Pérez, Arturo Joaquín; Cano-Millá, Nuria; Moya Villaescusa, María José; Montoya Carralero, José María; Navarro Cuellar, Carlos; Dermatología, Estomatología, Radiología y Medicina Física
    Photoactivation with ultraviolet C light can reverse the effects derived from biological ageing by restoring a hydrophilic surface. Ten titanium discs were randomly divided into three groups: a control group, a 6 W group, and an 85 W group. A drop of double-distilled, deionized, and sterile 10 µL water was applied to each of the discs. Each disc was immediately photographed in a standardized and perpendicular manner. Measurements were taken based on the irradiation time (15, 30, 60, and 120 min). UVC irradiation improved the control values in both groups. There was no difference in its effect between the 6 W group and the other groups during the first 30 min. However, after 60 min and up to 120 min, 85 W had a significantly stronger effect. The contact angles with the 85 W ultraviolet light source at 60 and 120 min were 19.43° and 31.41°, respectively, whereas the contact angles for the 6 W UVC source were 73.8° and 61.45°. Power proved to be the most important factor, and the best hydrophilicity result was obtained with a power of 85 W for 60 min at a wavelength of 254 nm.
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    Properties of polyetheretheretherketone (PEEK) implant abutments: a systematic review
    (Medicina Oral S. L., 2022-04) Ghazal Maghras, Romaisa; Vilaplana Vivo, Jaime; Camacho Alonso, Fabio; Martínez Beneyto, Yolanda; Dermatología, Estomatología, Radiología y Medicina Física
    Background: The main objective of the present systematic review is to know the mechanical and functional properties of PEEK (polyetheretheretherketone) abutment and to find out if it is a potential substitute for titanium abutments. Material and Methods: An electronic search was conducted in 5 databases: Medline (Pubmed), SciELO, Cochrane, Web of Science (WOS) and Google Scholar. Studies published from 2018 to 2020 and written in English were included. The protocol of this systematic review was registered in PROSPERO (ID 274834). ubsequently, data extraction and quality analysis were performed according to the modified CONSORT guidelines. Results: Initially, a total of 976 articles were obtained. Using Mendeley Desktop, duplicates were discarded, redu cing the number of articles to 483. After reading abstracts, 448 articles were excluded. Finally, 35 full-text articles were analysed, of which 5 articles were included in this systematic review. Conclusions: The available evidence shows that PEEK implant abutments do not have sufficient biomechanical requirements to replace the definitive titanium abutment. However, it is considered as an alternative and provisional material, especially if placed in the anterior region.