<p>CAD/CAM Customized Glass Fiber Post and Core With Digital Intraoral Impression: A Case Report</p>

Abstract

Video abstractPoint your SmartPhone at the code above. If you have a QR code reader the video abstract will appear. Or use: https://youtu.be/W9qD2b7Eg4oBackground: After endodontic treatment, a proper restorative technique is necessary to ensure coronal seal and protection of residual dental structure; teeth which have lost two or more walls need to be restored with posts to increase retention and stability of final restoration. Posts can be distinguished in prefabricated and customized, which are manufactured by lost wax technique or CAD-CAM.Purpose: Digital dentistry has been developed to increase workflow precision and to accelerate production process; use of CAD-CAM to realize customized posts was limited to scanning plaster models obtained from traditional impressions. Patients and Methods: In the reported case an intraoral scan was used to mill a post and core restoration on an endodontically treated inferior premolar; this operative protocol was based on previous in vitro experiments that confirmed the ability of 3shape Trios scanner to read post-space up to 9 mm in depth.Results: The digital technique allows us to convert the concave surface of the root canal into the convex surface of the post, and realize an anatomical post and core that improves the biomechanics of the endodontically treated tooth reducing the possibility of root fractures. Conclusion: The use of an intraoral digital scanner represents an opportunity for the clinician as it speeds up the production of an anatomical post and core restorations.

Stress distribution in restorations with glass fiber and polyetheretherketone intraradicular posts: An <i>in silico</i> analysis

“…The ideal material for making root posts would be one with an elastic modulus closest to that of dentin. The elastic modulus of dentin can range from 10 to 30 GPa, according to the structural composition of the dentin (age, anatomical differences) [1][2]5,10,18) .…”

Substituição de núcleo metálico fundido por pino de fibra de vidro anatomizado: relato de caso

“…Uma outra alternativa para dentes com amplos canais são os pinos de fibra de vidro personalizados e fresados através de CAD/CAM. Para Libonati et al 12 a técnica permite que, através de um escaneamento digital, produzam-se pinos de vibra de vidro anatômicos, totalmente adaptados ao conduto radicular, melhorando a biomecânica do dente tratado endodonticamente, a adesão às paredes do conduto e reduzindo a incidência de fraturas.…”

Current perspectives on dental adhesion: (3) Adhesion to intraradicular dentin: Concepts and applications

“…These posts adapt well to the most apical portions of the preparation, but a larger space remains between the post and the root canal wall in the more coronal portions, resulting in greater thicknesses of cement in this region [ 42 ]. The individual adaptation of fiberglass posts to the root canal walls before adhesive resin cementation, has been described in the literature as a technique to avoid this problem [ 95 ].…”