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Related Experiment Videos

Evaluating the efficacy of curing lights.

C S Solomon1, Y I Osman

  • 1Department of Conservative Dentistry, Faculty of Dentistry, University of the Western Cape, Mitchells Plain, South Africa.

SADJ : Journal of the South African Dental Association = Tydskrif Van Die Suid-Afrikaanse Tandheelkundige Vereniging
|June 22, 2000
PubMed
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Many dental curing lights provide inadequate light intensity for proper composite resin curing. This study found that a significant percentage of units in various clinics function below optimal levels, potentially compromising restoration quality.

Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Clinical Dentistry

Background:

  • Photoactivated composite resins are widely used in restorative dentistry.
  • Adequate polymerization of composites depends on light source intensity and wavelength.
  • Light curing units (LCUs) are essential for achieving optimal composite properties.

Purpose of the Study:

  • To measure the light intensity output of LCUs in state clinics, private practices, and trade union dental clinics.
  • To correlate LCU intensity with factors like age, maintenance, and bulb replacement.
  • To assess the adequacy of light intensity for effective photocuring.

Main Methods:

  • Light intensity was measured using the Efos Cure Rite radiometer.
  • LCUs were evaluated in various clinical settings.

Related Experiment Videos

  • Data on LCU age, maintenance, and bulb replacement were collected.
  • Main Results:

    • Mean light intensity readings varied widely, from 22 mW/cm² to 448 mW/cm².
    • 54.3% of LCUs operated at optimal intensities, while 17.1% were significantly below required levels.
    • No significant correlation was found between intensity and LCU age, maintenance, or bulb replacement.
    • Clinician satisfaction was high (100%) despite suboptimal LCU performance in 45.7% of cases.

    Conclusions:

    • A substantial proportion of LCUs in surveyed clinics exhibit inadequate light intensity for optimal composite curing.
    • Clinician perception of LCU performance does not always align with objective intensity measurements.
    • Regular calibration and maintenance of LCUs are crucial to ensure adequate light intensity for dental restorations.