Study
Final ProductionHigh ImpactStrong effect

Glass Ionomer Fracture Resistance Increases with 3-Month Maturation

The fracture resistance of certain contemporary glass ionomer restorative materials in Class II dental cavities significantly improves after a 3-month storage period, suggesting a maturation process enhances material integrity.

Al-Azhar Dental Journal for Girls · 2019

01

Key Findings

  • 01Amalgomer CR exhibited the highest mean fracture resistance, followed by EQUIA Fort fil, with EQUIA fil showing the lowest.
  • 02Fracture resistance generally increased with longer storage periods, with the highest values observed after 3 months.
  • 03Ceramic-reinforced glass ionomer (Amalgomer CR) demonstrated promising fracture resistance.
02

Application

Design takeaway

Designers and manufacturers of dental restorative materials should investigate and highlight the time-dependent mechanical properties of their products, as maturation can significantly enhance performance.

How to apply

When specifying or developing dental restorative materials, consider testing their mechanical properties at various time points post-application to understand their full performance envelope.

Project actions

  • 01When selecting materials for a design project, consider how their properties might change over time or with environmental exposure.
  • 02Investigate the 'curing' or 'maturation' phases of materials to understand their full potential performance.
03

Method & Evidence

AimTo evaluate and compare the fracture resistance of contemporary glass ionomer restorative materials in Class II cavities at different time intervals.
MethodComparative experimental study
ProcedureExtracted premolars were prepared with Class II cavities and restored using three different glass ionomer materials. Samples were divided into three groups based on storage time (24 hours, 1 month, 3 months) and stored in artificial saliva. Prior to testing, samples underwent thermocycling. Fracture resistance was measured using a universal testing machine, and failure modes were analyzed microscopically.
Sample90 participants (extracted teeth)
ContextDental restorative materials

Variables

IV["Type of glass ionomer material","Time interval after restoration"]
DV["Fracture resistance"]
CV["Cavity preparation type (Class II)","Tooth type (maxillary premolars)","Number of thermocycling cycles","Storage medium (artificial saliva)"]
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Strengths & Limitations

Strengths

  • +Direct comparison of multiple contemporary materials.
  • +Inclusion of time-dependent analysis and thermocycling to simulate clinical conditions.

Limitations

Testing in a simulated environment (like artificial saliva) might not fully capture real-world conditions. The study focused on specific brands, so results might not apply to all glass ionomers.

Reliability & validity

The use of a universal testing machine and stereomicroscope/SEM for failure analysis enhances the reliability and validity of the fracture resistance measurements and failure mode assessments. However, the limited number of materials and the use of extracted teeth introduce some limitations to generalizability.

Think critically

How might the differences in material composition (e.g., ceramic reinforcement) influence the rate and extent of this observed maturation effect?

05

Design Principles

"Material performance can be time-dependent, with potential for in-situ maturation to improve mechanical properties."

Understanding the long-term performance and maturation of restorative materials is crucial for predicting clinical longevity and success. This insight informs material selection and treatment planning, potentially reducing the need for premature replacements and improving patient outcomes.

06

What This Means for Your Design

Dental fillings made of glass ionomer get stronger the longer they are in the mouth, especially after about three months. Some types are naturally stronger than others.

How to use in your project

  • 1.Reference this study when discussing the material properties of dental composites or similar restorative materials, particularly concerning their mechanical strength and time-dependent behavior.
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Add to My Project

08

Quick Cite

(2019). Evaluation of Fracture Resistance of Some Contemporary Class II Glass Ionomer Restorations at Different Time Intervals. Al-Azhar Dental Journal for Girls. https://doi.org/10.21608/adjg.2019.28401 Retrieved from https://designdex.org/study/cba5af5a-4438-44e8-a9b2-b640790e7708/glass-ionomer-fracture-resistance-increases-with-3-month-maturation

Paragraph starter

Research indicates that the fracture resistance of glass ionomer restorative materials can improve significantly over time, with optimal strength observed after approximately three months of maturation in situ. This suggests that the material's mechanical integrity is not static but develops post-application, a factor crucial for predicting the long-term clinical success of dental restorations.

09

Source

Al-Azhar Dental Journal for Girls

Evaluation of Fracture Resistance of Some Contemporary Class II Glass Ionomer Restorations at Different Time Intervals

journal · 2019

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Questions about this research

What does the research say about glass ionomer fracture resistance increases with 3-month maturation?
Designers and manufacturers of dental restorative materials should investigate and highlight the time-dependent mechanical properties of their products, as maturation can significantly enhance performance. Evidence: Al-Azhar Dental Journal for Girls (2019).
Why does "Glass Ionomer Fracture Resistance Increases with 3-Month Maturation" matter for design?
Understanding the long-term performance and maturation of restorative materials is crucial for predicting clinical longevity and success. This insight informs material selection and treatment planning, potentially reducing the need for premature replacements and improving patient outcomes.
How can designers apply this research?
Designers and manufacturers of dental restorative materials should investigate and highlight the time-dependent mechanical properties of their products, as maturation can significantly enhance performance.
What were the main findings?
Amalgomer CR exhibited the highest mean fracture resistance, followed by EQUIA Fort fil, with EQUIA fil showing the lowest.. Fracture resistance generally increased with longer storage periods, with the highest values observed after 3 months.. Ceramic-reinforced glass ionomer (Amalgomer CR) demonstrated promising fracture resistance.
What research method was used?
Comparative experimental study with 90 participants (extracted teeth).
How strong is the evidence?
Evidence strength is rated Strong effect, based on a 2019 journal from Al-Azhar Dental Journal for Girls.
What should I do differently in my next project?
When specifying or developing dental restorative materials, consider testing their mechanical properties at various time points post-application to understand their full performance envelope.
What are the limitations?
The study used extracted teeth and artificial saliva, which may not perfectly replicate the oral environment. The number of material types tested was limited.
Is there evidence that glass ionomer affects design outcomes?
The study found that glass ionomer dental fillings become stronger over time, with the best performance seen after three months. A ceramic-reinforced material (Amalgomer CR) was particularly robust. Understanding the long-term performance and maturation of restorative materials is crucial for predicting clinical longev Source: Al-Azhar Dental Journal for Girls (2019).
Where does this fracture resistance research apply?
Dental restorative materials It sits within final production research on designdex.org.

Related research topics

glass ionomer design research · evidence on glass ionomer · does glass ionomer improve design outcomes · fracture resistance studies for designers · glass ionomer and fracture resistance findings · final production research evidence