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. 2021 Dec 16;14(24):7791.
doi: 10.3390/ma14247791.

Comparative Analysis of Fracture Resistance between CAD/CAM Materials for Interim Fixed Prosthesis

Cristian Abad-Coronel  1   2 , Elena Carrera  1 , Nancy Mena Córdova  1 , Jorge I Fajardo  3 , Paulina Aliaga  4
Affiliations

Comparative Analysis of Fracture Resistance between CAD/CAM Materials for Interim Fixed Prosthesis

Cristian Abad-Coronel et al. Materials (Basel). .

Abstract

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.

Keywords: CAD/CAM; CAD/CAM materials; fracture resistance; interim restorations; rapid prototyping.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Maxillary typodont with preparations for a three-unit FDP.
Figure 2
Figure 2
Design of a three-unit fixed dental prosthesis (FDP) using biogeneric modality.
Figure 3
Figure 3
Sample of a milled FDP.
Figure 4
Figure 4
Sample of a 3D printed FDP.
Figure 5
Figure 5
Fracture strength test in a universal testing machine.
Figure 6
Figure 6
Box plot for the fracture strength variable for each group.
Figure 7
Figure 7
Line graph for the strength variable, according to the group. Note: the lines show the distribution of the different replicas in each group.
Figure 8
Figure 8
Image of fracture of bridge in pontic zone. Upper images correspond to printed restorations and lower images to milled restorations.
See this image and copyright information in PMC

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