Comparative analysis of fracture resistance between cad/cam materials for interim fixed prosthesis

Cristian Abad-Coronel, Elena Carrera, Nancy Mena Córdova, Jorge I. Fajardo, Paulina Aliaga

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6 Scopus citations


The aim of this study was to evaluate and compare the resistance to fracture of interim restorations obtained through additive techniques (3D impressions) and subtractive techniques (milling) using a computer-aided design and manufacture (CAD/CAM) system of a three-unit fixed dental prosthesis (FDP) to ascertain its clinical importance. (1) Materials and methods: In total, 40 samples were manufactured and divided into two groups (n = 20) using: (1) light-curing micro hybrid resin for temporary crowns and bridges (PriZma 3D Bio Prov, MarketechLabs, São Paulo, Brazil) for the rapid prototyping group (RP) and (2) a polymethylmethacrylate (PMMA) CAD/CAM disc (Vipiblock Trilux, VIPI, São Paulo, Brazil) for the computer-assisted milling (CC). The resistance to fracture was determined with a universal testing machine. (2) Results: The strength and the standard deviation for the computer-assisted milling group were higher (1663.57 ± 130.25 N) than the rapid prototyping (RP) group, which had lower values of (1437.74 ± 73.41 N). (3) Conclusions: The provisional restorations from the computer-assisted milling group showed a greater resistance to fracture than the provisional restorations obtained from the rapid prototyping group.

Original languageEnglish
Article number7791
Issue number24
StatePublished - 1 Dec 2021

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© 2021 by the authors. Licensee MDPI, Basel, Switzerland.


  • CAD/CAM materials
  • Fracture resistance
  • Interim restorations
  • Rapid prototyping


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