Step-Stress Fatigue, Fracture Toughness and Load to Failure of an Additively Manufactured Ceramic Filled Hybrid Crown Material
type: CreativeWork
description: Background: The prevailing trend in dental practice is toward fully digital workflows with additive and subtractive manufacturing. Computer Aided Design Computer Aided Manufacturing (CADCAM) and subtractive manufacturing have led to a proliferation of established restorative materials. In September 2021, the FDA approved Varseosmile Crown Plus, by Bego, for utilization as a permanent crown. This novel composite is the first additive manufactured material to receive approval as a ceramic hybrid for permanent single crowns, inlays, onlays and veneers.[1] The manufacturer categorizes Varseosmile Crown Plus as a ceramic filled hybrid composed of esterification products of 4.4'-isopropylidiphenol, ethoxylated and 2-methylprop-2enoic acid, silanized dental glass.[2] The total content of inorganic fillers (particle size 0.7 μm) is 30 – 50 % by mass.[2] Information published on the mechanical properties of Varseosmile Crown Plus is limited due to its novelty. Hypotheses: There will be no difference in step-stress fatigue on disc specimens, no difference in fracture toughness on bar shaped specimens and no difference in load to failure on tooth shaped specimens between Varseosmile Crown Plus and Vita Enamic. Methods: Two materials were assessed in three tests. Six bars of both materials were utilized to assess fracture toughness following the ISO6872:2015[3] standard. The fracture toughness was assessed utilizing the single edge v-notch beam (SEVNB) in a three-point bending test. Ten samples of each material were used to evaluate the fatigue resistance utilizing the stepwise stress method on disc samples according to ISO6872:2015[3] with a piston-on-three-ball configuration at room temperature under dry conditions. The final material property assessment was load-to-fracture in crown shaped samples adhesively bonded to dentin analogs. A mandibular right first molar (#30) was prepared on a typodont. The preparation was scanned and digitized to make twenty two dentin analogs (N…
abstract: Background: The prevailing trend in dental practice is toward fully digital workflows with additive and subtractive manufacturing. Computer Aided Design Computer Aided Manufacturing (CADCAM) and subtractive manufacturing have led to a proliferation of established restorative materials. In September 2021, the FDA approved Varseosmile Crown Plus, by Bego, for utilization as a permanent crown. This novel composite is the first additive manufactured material to receive approval as a ceramic hybrid for permanent single crowns, inlays, onlays and veneers.[1] The manufacturer categorizes Varseosmile Crown Plus as a ceramic filled hybrid composed of esterification products of 4.4'-isopropylidiphenol, ethoxylated and 2-methylprop-2enoic acid, silanized dental glass.[2] The total content of inorganic fillers (particle size 0.7 μm) is 30 – 50 % by mass.[2] Information published on the mechanical properties of Varseosmile Crown Plus is limited due to its novelty. Hypotheses: There will be no difference in step-stress fatigue on disc specimens, no difference in fracture toughness on bar shaped specimens and no difference in load to failure on tooth shaped specimens between Varseosmile Crown Plus and Vita Enamic. Methods: Two materials were assessed in three tests. Six bars of both materials were utilized to assess fracture toughness following the ISO6872:2015[3] standard. The fracture toughness was assessed utilizing the single edge v-notch beam (SEVNB) in a three-point bending test. Ten samples of each material were used to evaluate the fatigue resistance utilizing the stepwise stress method on disc samples according to ISO6872:2015[3] with a piston-on-three-ball configuration at room temperature under dry conditions. The final material property assessment was load-to-fracture in crown shaped samples adhesively bonded to dentin analogs. A mandibular right first molar (#30) was prepared on a typodont. The preparation was scanned and digitized to make twenty two dentin analogs (N…
author: Roberts, Evan
language: en_US
keywords: Varseosmile Crown Plus, Additive Manufacture, Vita Enamic
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date published: 2024-05
date modified: 2026-07-24T02:41:19Z
provider: IUPUI
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: IUPUI

PropertyValue
property ID: Handle
value: https://hdl.handle.net/1805/40732

PropertyValue
property ID: DOI
value: 10.7912/0R84-NV69