Contact fracture test of monolithic hybrid ceramics on different substrates for bruxism

•Fracture resistance of PICN VE was positively associated with specimen thicknesses.•0.8 mm PICN VE on stiff substrate could withstand static heavy force 800 N loading.•2.0 mm PICN VE on stiff substrate could withstand 800 N sliding motion.•PICN VE on soft substrate was not recommended for clinical...

Full description

Saved in:
Bibliographic Details
Published in:Dental materials 2022-01, Vol.38 (1), p.44-56
Main Authors: Lan, Ting-Hsun, Chen, Ping-Ho, Fok, Alex Siu Lun, Chen, Yu-Feng
Format: Article
Language:English
Subjects:
Bruxism
CAD
Ceramics
Computer aided design
Contact fracture
Crowns
Dental Porcelain
Dental Restoration Failure
Dental Stress Analysis
Dentition
Finite element analysis
Finite element method
Flexural strength
Fracture testing
Fracture toughness
Humans
Materials Testing
Mathematical models
Monolithic hybrid ceramic
Polyamide resins
Polyamides
Polymers
Prostheses
Prosthetics
Stress
Stress distribution
Substrates
Teeth
Thickness
Three dimensional models
Vertical loads
Zirconia
Zirconium
Zirconium dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Fracture resistance of PICN VE was positively associated with specimen thicknesses.•0.8 mm PICN VE on stiff substrate could withstand static heavy force 800 N loading.•2.0 mm PICN VE on stiff substrate could withstand 800 N sliding motion.•PICN VE on soft substrate was not recommended for clinical use in bruxism. To determine the minimum thickness required for a monolithic hybrid ceramic crown on different substrates (soft vs stiff) used in posterior dentition for bruxism. 80 polymer-infiltrated ceramic networks Vita Enamic (PICN VE) disc specimens with four different occlusal thicknesses (0.8, 1.2, 1.6 and 2.0 mm), were produced using a computer-aided design/manufacturing system, and cemented on a stiff (zirconia) or soft (polyamide) substrate of 4-mm thickness. The ten specimens, in soft or stiff groups, were subjected to compressive loading by a MTS machine until fracture or maximum load (4500 N) was reached. The unbroken specimens were examined using optical coherence tomography. Eight axisymmetric finite element models and eight 3D models comprising the four different occlusal thicknesses and two substrates under different vertical loads and sliding movements were constructed. The maximum principal stress was selected to evaluate the stress distribution in this study. The fracture resistance of the specimens was significantly different between the two substrates (P 
ISSN:0109-5641
1879-0097
DOI:10.1016/j.dental.2021.10.010