Vertical preparation: a new technique for analogical and digital impressions
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Castelo Baz, Pablo; Freire-Álvarez-Blázquez, María; Pereira Lores, Patricia; Álvarez Nóvoa, Pablo; Dablanca Blanco, Ana Belén; Miguéns Vila, Ramón; Martín Biedma, Benjamín
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Aquest document és un/a article, creat/da en: 2023
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The BOPT technique (Biologically Oriented Preparation Technique) was proposed by Loi et al. (1) and has become a popular form of vertical preparation for complete crowns with promising results. In this procedure, the clinician can operate on the gingival tissue during preparation and modify its structure in thickness and height by adding modifications on the provisional restoration. However, one of the main challenges in this technique is the transference of information about the gingival tissue to the laboratory technician, who will place the margin of the restoration randomly in a space determined by two marks on the working cast.The technique proposed enables the accurate transmission of the exact point where the margin of the restoration needs to be placed. Furthermore, it facilitates the recording of conventional impression materials and intraoral scanners due to the compression of polytetrafluoroethylene (PTFE) tape into the sulcus, which allows to arrest bleeding or intracrevicular liquid and is easily registered irrespective of the method of impression used.
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