Abstract
Temporary restorations play a fundamental role in oral rehabilitation. They can be used on teeth or implants for a variable period of time during the period prior to rehabilitation with definitive restorations. Temporary or provisional restorations manufactured via CAD/CAM methods are becoming increasingly used in the intermediate phase of the treatment of complex cases. The main objective of this study was to compare the fracture resistance of three materials used in the creation of provisional crowns on implants: polymethyl methacrylate (PMMA), composite resin, and polyether ether ketone (PEEK). Fracture resistance in PMMA (Zirkonzahn Temp Basic® , Gais, South Tyrol, Italy) ranged from 1216.0 N to 1461.2 N, with a mean of 1300.4 N (SD = 97.09). In the composite material (3M Lava Ultimate®, Minnesota, USA), fracture resistance varied between 1343.5 N and 1490.6 N, with a mean of 1425.9 N (SD = 49.03). Lastly, in PEEK (Tecno Med Mineral®, Zirkonzahn®, Gais, South Tyrol, Italy), fracture resistance ranged from 2294.8 N to 2451.7 N, with a mean of 2359.5 (SD = 50.01). The crowns made with the PEEK Tecno Med Mineral® (Zirkonzahn®, Tyrol, Italy) material presented the best fracture resistance, followed by the crowns made with the Lava Ultimate® (3M® ESPE, Minnesota, USA) composite resin material and, finally, those made with the PMMA Temp Basic® (Zirkonzahn®, Tyrol, Italy) material.
Highlights
Temporary restorations play a fundamental role in oral rehabilitation
Temporary crowns can be made of polymethyl methacrylate (PMMA), composite resin, or polyether ether ketone (PEEK)
The aim of this study was to evaluate and compare the fracture resistance of three materials used in the creation of temporary crowns on dental implants: PMMA, composite resin, and PEEK
Summary
Temporary restorations play a fundamental role in oral rehabilitation. They can be used over teeth or over implants for a variable amount of time during the period prior to rehabilitation with permanent restorations [1,2,3,4].Implant-supported provisional restorations (ISPRs) are fundamental to enhancing the esthetics, contour, and modeling of peri-implant tissue architecture. Temporary restorations play a fundamental role in oral rehabilitation. Suggested the term “guided tissue healing” to describe the use of an ISPR to guide the soft tissue architecture. This approach constitutes the state of the art in implantology [2,3,6,7]. Temporary crowns can be made of polymethyl methacrylate (PMMA), composite resin, or polyether ether ketone (PEEK). These provide strength, dimensional and marginal stability, and functional occlusal load [2,3,6]
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