Short answer

When designing CAD/CAM dental restorations, prioritize materials that balance robust mechanical performance with precise fit to ensure clinical longevity and patient satisfaction.

Field: Final Production
Source: Egyptian Dental Journal /Egyptian Dental Journal (2023)
Method: Experimental testing and simulation
Sample: 15 participants (crowns)
Evidence: Strong effect

Three types of CAD/CAM hybrid ceramic materials demonstrate sufficient fatigue resistance and fracture strength for clinical application, with varying marginal gap performance. This final production research insight is drawn from a 2023 study published in Egyptian Dental Journal /Egyptian Dental Journal. Using Experimental testing and simulation with 15 participants (crowns), researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing CAD/CAM dental restorations, prioritize materials that balance robust mechanical performance with precise fit to ensure clinical longevity and patient satisfaction.

Study

Final ProductionRecentStrong effect

Hybrid Ceramic Crowns Exhibit Clinically Acceptable Fatigue Resistance and Fracture Strength

Three types of CAD/CAM hybrid ceramic materials demonstrate sufficient fatigue resistance and fracture strength for clinical application, with varying marginal gap performance.

Egyptian Dental Journal /Egyptian Dental Journal · 2023

Key Findings

01All tested hybrid ceramic crowns survived 250,000 cycles of fatigue loading.
02Shofu Hc exhibited the largest vertical marginal gap across all testing stages.
03Shofu Hc demonstrated the highest mean fracture strength, followed by Vita Enamic and then Brilliant Crios.

Application

Design takeaway

When designing CAD/CAM dental restorations, prioritize materials that balance robust mechanical performance with precise fit to ensure clinical longevity and patient satisfaction.

How to apply

When specifying materials for CAD/CAM fabricated components, consult performance data on fatigue, fracture, and dimensional stability, and consider the impact of manufacturing tolerances on final assembly and function.

Project actions

01When selecting materials for a design project, research their performance under stress and their dimensional stability.
02Consider how manufacturing processes might affect the final fit and function of a product.

Method & Evidence

AimTo evaluate the fatigue resistance, fracture strength, and marginal integrity of three distinct CAD/CAM hybrid ceramic materials intended for crown fabrication.

MethodExperimental testing and simulation

ProcedureMaxillary premolar teeth were prepared and scanned to create resin dies. Hybrid ceramic crowns were milled from three different materials (Vita Enamic, Brilliant Crios, Shofu Hc). Initial marginal gaps were measured, crowns were bonded, and marginal gaps were remeasured. Specimens underwent thermocycling and fatigue testing in a chewing simulator. Surviving crowns were then subjected to a static load to determine fracture strength. Marginal gaps were reassessed after fatigue testing.

Sample15 participants (crowns)

ContextDental prosthetics and restorative materials

Variables

IV["Type of hybrid ceramic material (Vita Enamic, Brilliant Crios, Shofu Hc)"]

DV["Fatigue resistance (cycles to failure)","Fracture strength (load to fracture)","Vertical marginal gap (mm)"]

CV["Tooth preparation design","Scanning method","Milling machine","Bonding cement","Thermocycling parameters","Fatigue loading parameters (force, frequency)","Static loading speed"]

Strengths & Limitations

Strengths

+Utilized clinically relevant testing methods (fatigue simulation, fracture testing).
+Compared multiple material types under standardized conditions.

Limitations

The study focused on specific materials and a simulated environment; real-world use might involve different wear patterns, temperatures, and stresses.

Reliability & validity

The study's validity is supported by the use of standardized testing protocols and clinically relevant simulations. Reliability is enhanced by the sample size of five per group and statistical analysis, though replication across different labs would further confirm findings.

Think critically

How might the differences in marginal gap performance observed between the materials impact the long-term success and maintenance of the restorations in a real-world clinical setting?

Design Principles

"Material selection in restorative design must balance strength, durability, and dimensional accuracy to meet functional and clinical requirements."

This research provides critical data for designers and manufacturers selecting materials for dental restorations. Understanding the performance characteristics of different hybrid ceramics under simulated clinical conditions helps ensure the longevity and reliability of prosthetic devices, impacting patient outcomes and reducing the need for premature replacements.

What This Means for Your Design

Different types of ceramic materials used for making crowns for teeth can withstand chewing forces and resist breaking, and they fit the teeth well enough for dentists to use them.

How to use in your project

1.Reference this study when justifying the selection of a particular material for a restorative design, highlighting its proven mechanical properties and acceptable fit.

Add to My Project

Quick Cite

Paragraph starter

The selection of hybrid ceramic materials for CAD/CAM dental restorations was informed by research indicating that materials such as Vita Enamic, Brilliant Crios, and Shofu Hc exhibit clinically acceptable fatigue resistance and fracture strength, with marginal gaps falling within acceptable ranges, ensuring functional integrity and durability under simulated clinical loading conditions.

Source

Egyptian Dental Journal /Egyptian Dental Journal

FATIGUE RESISTANCE, FRACTURE STRENGTH AND MARGINAL INTEGRITY OF THREE TYPES OF CAD/CAM HYBRID CERAMIC CROWNS

journal · 2023

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Questions About This Research

What does the research say about hybrid ceramic crowns exhibit clinically acceptable fatigue resistance and fracture strength?: When designing CAD/CAM dental restorations, prioritize materials that balance robust mechanical performance with precise fit to ensure clinical longevity and patient satisfaction. Evidence: Egyptian Dental Journal /Egyptian Dental Journal (2023).
Why does "Hybrid Ceramic Crowns Exhibit Clinically Acceptable Fatigue Resistance and Fracture Strength" matter for design?: This research provides critical data for designers and manufacturers selecting materials for dental restorations. Understanding the performance characteristics of different hybrid ceramics under simulated clinical conditions helps ensure the longevity and reliability of prosthetic devices, impacting patient outcomes and reducing the need for premature replacements.
How can designers apply this research?: When designing CAD/CAM dental restorations, prioritize materials that balance robust mechanical performance with precise fit to ensure clinical longevity and patient satisfaction.
What were the main findings?: All tested hybrid ceramic crowns survived 250,000 cycles of fatigue loading.. Shofu Hc exhibited the largest vertical marginal gap across all testing stages.. Shofu Hc demonstrated the highest mean fracture strength, followed by Vita Enamic and then Brilliant Crios.
What research method was used?: Experimental testing and simulation with 15 participants (crowns).
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2023 journal from Egyptian Dental Journal /Egyptian Dental Journal.
What should I do differently in my next project?: When specifying materials for CAD/CAM fabricated components, consult performance data on fatigue, fracture, and dimensional stability, and consider the impact of manufacturing tolerances on final assembly and function.
What are the limitations?: The study used a single tooth preparation and simulated intraoral conditions, which may not fully replicate the complexity of diverse clinical scenarios. The long-term effects of cementation and aging beyond the tested parameters were not assessed.