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Curing lights: changes in intensity output with use over time

J G Poulos1, D L Styner

  • 1Division of Prosthodontics and Restorative Sciences, New York University College of Dentistry, NY 10010, USA.

General Dentistry
|January 1, 1997
PubMed
Summary

Dental curing light intensity decreases with age. Older lights (3 years) showed significantly lower output (376 mW/cm2) compared to newer ones (1-2 years, 423 mW/cm2), impacting resin composite polymerization.

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Area of Science:

  • Dental Materials Science
  • Polymerization Technology
  • Clinical Dentistry

Background:

  • Curing light intensity is crucial for resin composite polymerization depth and time.
  • Dental curing devices, such as Max Curing Lights, are essential in modern restorative procedures.
  • The performance of curing lights may degrade over time, potentially affecting clinical outcomes.

Purpose of the Study:

  • To investigate the changes in intensity output of Max Curing Lights over time.
  • To quantify the reduction in light intensity based on the age of the curing units.
  • To determine if the age of curing lights has a statistically significant effect on their intensity output.

Main Methods:

  • Utilized a Demetron Model 100 Curing Radiometer to measure light intensity.

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  • Tested a sample of 201 Max Curing Lights with ages ranging from 1 to 3 years.
  • Employed Analysis of Variance (ANOVA) and a post-hoc Scheffe test for statistical analysis.

    • Main Results:

    • Curing lights aged 1 and 2 years exhibited a mean intensity output of 423 mW/cm2.
    • Curing lights aged 3 years showed a reduced mean intensity output of 376 mW/cm2.
    • Statistical analysis confirmed a significant decrease in intensity output with increased age of the curing lights.

    Conclusions:

    • The intensity output of Max Curing Lights significantly diminishes with age.
    • Dental professionals should be aware of potential performance degradation in older curing lights.
    • Regular monitoring of curing light intensity is recommended to ensure effective resin composite polymerization.