Fatigue damage of monolithic posterior computer aided designed/computer aided manufactured crowns

Schlenz, Maximiliane Amelie; Schmidt, Alexander; Rehmann, Peter; Wöstmann, Bernd

doi:10.1016/j.jpor.2019.02.003

Cited by 14 publications

(16 citation statements)

References 44 publications

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“…In addition, the resin-based CAD/CAM materials are pre-fabricated and completely polymerized by the manufacturer, which means a poor oxygen-inhibited layer is present on the surface of the materials [14]. Moreover, several studies indicated that the hoop stress that originated at the circumference of the restorations with occlusal forces led to the loosening of the restorations [9,15]. Fracture failures of the restorations were also observed as a technical complication [5,10,13].…”

Section: Discussionmentioning

confidence: 99%

Clinical outcomes of single crown restorations fabricated with resin-based CAD/CAM materials

et al. 2020

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Computer-aided design/computer-aided manufacturing (CAD/ CAM) restorative materials have been widely used owing to a number of advantages, including stable quality of the materials, lower costs, and time-saving factors. Resin-based CAD/CAM materials for definitive restorations are classified into two groups: dispersed nanoparticle-filled composite resin and polymer-infiltrated-ceramic-network materials. Resinbased CAD/CAM materials have been applied to single crown restorations as a monolithic structure for the posterior region. In addition, resin-based CAD/CAM restorations have been applied recently for the anterior area. This literature review summarizes clinical outcomes, such as survival rates and clinical complications of single crown restorations fabricated with resin-based CAD/CAM materials.

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Section: Discussionmentioning

confidence: 99%

Clinical outcomes of single crown restorations fabricated with resin-based CAD/CAM materials

et al. 2020

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“…[36] The teeth were CAD/CAM-milled under permanent water cooling in a numerical control milling machine (CNC) (Mikron HSM 400, GF Machining Solutions, Geneva, Switzerland) to ensure identical tooth preparation with a dentin surface [37]. Therefore, a Standard Tessellation Language (STL) dataset was designed with CAD software (Service Release 12, McNeel Europe, Barcelona, Spain) according to the following parameters: a height of 4.0 mm, a mesio-distal width of 9.5 mm, a bucco-oral width of 7.5 mm, a convergence angle of 6° and a 1.0 mm chamfer with 30° angle [6].…”

Section: Manufacturing Of Test Specimensmentioning

confidence: 99%

“…Fatigue testing of specimens was simulated in a mouth-motionsimulator (prematecF1000, wl-tec GmbH, Wertheim, Germany) with compressive, cyclic loading between 50 and 500 N (2 Hz) in the central fossa of the crowns [6,37]. The specimens were tested in distilled water at 37 ± 2°C in uniaxial direction under constant contact with a semi-spherical stainless steel antagonist (R1, SD Mechantronik GmbH, Feldkirchen, Germany, ) with a diameter of 3.18 mm and an elastic modulus of 200 GPa [39].…”

Section: Mouth-motion-simulationmentioning

confidence: 99%

“…Moreover, they do not have the oft-described problem of chipping fractures and show superior fracture resistance compared to veneered FDPs [1,4,5]. However, the mechanical properties, including fatigue behaviour under loading, [6] differ between the high-strength zirconia, the brittle glass ceramic and the elastic resin composite [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…The majority of failures occur due to repeatable subcritical loading [20]. Fatigue damage occurs under the occlusal contact area (OCA) and includes three phases: crack nucleation, crack propagation and partial or total failure [6,21,22]. Traditional methods for the investigation of fatigue damage are destructive, such as slicing specimens and analysing them under a light microscope or scanning electron microscope (SEM).…”

Section: Introductionmentioning

confidence: 99%

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Monitoring fatigue damage in different CAD/CAM materials: A new approach with optical coherence tomography

et al. 2021

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Purpose: To investigate fatigue damage over time, monolithic posterior computer-aided-designed/computer-aided-manufactured (CAD/CAM) crowns were artificially aged in a mouth-motion-simulator, and damage was monitored with optical coherence tomography (OCT). Methods: Forty-eight crowns were milled of six different CAD/CAM-materials (n=8), including 3Y-TZP (Lava Plus,'3Y'), 4Y-PSZ (Pritidentamultidisc,'4Y'), 5Y-PSZ (Prettauanterior,'5Y'), zirconia-reinforced lithium silicate (CeltraDuo,'ZLS'), hybrid ceramic (Vita Enamic,'VE'), and resin composite (BrilliantCrios,'COM'), and were adhesively luted on CAD/CAM-milled human molars. Specimens were artificially aged in a mouth-motion-simulator (50-500N, 2Hz, 37°C) for a period of 1 million cycles. Before loading and every 250,000 cycles, the specimens were investigated with spectral domain (SD)-OCT (RS-3000). The maximum vertical and horizontal damage were measured with imaging-processingsoftware (ImageJ). After testing, the specimens were sliced and analysed via light microscope (Zeiss) to compare the new OCT method with the established light microscope method. Data were subjected to ANCOVA and 2x4-ANOVA. Results: No failure occurred during mouth-motion-simulation. However, all specimens (except for 3Y and 4Y) showed fatigue damage. There was a significant difference in the maximum damage between the CAD/CAM-materials (p<.05). ZLS exhibited the highest damage, followed by VE, COM and 5Y. While damage associated with 5Y was initially noticed after 750,000 cycles, all other materials already showed crack formation after 250,000 cycles. Furthermore, a linear increase in damage over time was noticed in all materials. Due to the shallow light penetration of OCT, damage in the outer area could only be visualized with light microscope. Conclusions: OCT is feasible for monitoring fatigue damage over time within different CAD/CAM-materials, particularly for subsurface damages.

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Survival of implant-supported resin-matrix ceramic crowns: In silico and fatigue analyses

et al. 2021

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Fatigue damage of monolithic posterior computer aided designed/computer aided manufactured crowns

Cited by 14 publications

References 44 publications

Clinical outcomes of single crown restorations fabricated with resin-based CAD/CAM materials

Clinical outcomes of single crown restorations fabricated with resin-based CAD/CAM materials

Monitoring fatigue damage in different CAD/CAM materials: A new approach with optical coherence tomography

Survival of implant-supported resin-matrix ceramic crowns: In silico and fatigue analyses

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