This clinical report introduces an approach for detecting the supragingival finish line by penetrating the teeth and gingival tissue using optical coherence tomography (OCT) technology. This approach was used in 3 patients who underwent tooth preparation with a subgingival finish line. Consequently, the subgingival finish line, typically challenging to discern clearly in intraoral scans, was identifiable in the OCT image.
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http://dx.doi.org/10.1016/j.prosdent.2023.09.039 | DOI Listing |
J Dent
February 2025
Department of Neurosciences, Reproductive and Odontostomatological Sciences, Division of Prosthodontics, Scientific Unit of Digital Dentistry, University "Federico II" of Naples, Naples, Italy.
Objectives: This study evaluated the accuracy of the Medit i700 intraoral scanner (IOS) in capturing horizontal tooth preparations at different depths below the gingival margin and assessed its ability to detect surfaces beyond the finish line.
Methods: Using CAD software, two abutments of a standard maxillary first molar were designed with horizontal preparation and 0.8 mm chamfer at 1 mm and 2 mm depths below the gingival margin.
J Endod
November 2024
Postgraduate Program in Dentistry, Iguaçu University (UNIG), Nova Iguaçu, Rio de Janeiro, Brazil; Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Rio de Janeiro, Brazil.
Introduction: The intracanal antibacterial effectiveness of a bioceramic medication was compared with calcium hydroxide pastes in different vehicles.
Methods: Extracted mandibular incisors with a single long oval canal were selected and distributed into 5 groups based on anatomically paired microcomputed tomographic analyses. The root canals were prepared up to an instrument size 35/04 and contaminated for 30 days with a mixed bacterial culture from subgingival biofilm added with Enterococcus faecalis.
J Prosthet Dent
December 2024
Director and Attending Staff, Department of Dentistry, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan, ROC. Electronic address:
Statement Of Problem: Digital scans for single crowns have been reported to achieve accuracy similar to that of traditional impressions in certain patients, but criteria for acquiring high-quality scans are lacking.
Purpose: The purpose of this in vitro study was to determine the optimal gingival displacement widths, finish line depths, and preparation designs for single crowns when using intraoral scanners (IOSs) to achieve clinically acceptable and high-quality recordings.
Material And Methods: Three different preparation designs of computer-aided design and computer-aided manufacturing (CAD-CAM) polymethyl methacrylate (PMMA) abutments (round shoulder, shoulder, and sloped shoulder) were fitted with titanium sleeves of 4 different thicknesses (0.
J Esthet Restor Dent
December 2024
Barcelona Dental Institute, Barcelona, Spain.
J Dent Res Dent Clin Dent Prospects
September 2024
Prosthodontics Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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