ارزيابي شدت اشعه دستگاه لايت در مطب هاي دندان پزشكان قزوين (1383)

Evaluation of curing light intensity in private dental offices (2005) 50 M Javaheriʹ"

Background: Success rate in composite restorations is associated with the degree of polymerization and light intensity, Objective: The aim of this study was to evaluate the light intensity of curing units in private offices in Qazvin 2003. Methods: In this analytical study the light intensity of 62 light curing units were investigated before and after cleaning their light emitting tips using a radiometer. The results were classified in 3 groups as follows: A: sufficient intensity> 300 rc: B: borderline intensity (200-299 mw/cm"), and Co insufficient intensity<200 mW/,mʹ. Data were analyzed using chi-square and Pearson correlation tests. Findings: Mean intensity of curing units was 350.96mw/,,"ʹ which increased significantly to 371.6mw/,mʹ (p~O.OI). Before cleaning, 67.8% of curing tips were in group A, 14.5% in Band 17.7% in C. After cleaning, 72.6% were in sufficient intensity group, 11.3% in borderline intensity, and 14.1% in insufficient intensity. Removing curing tipsʹ contamination caused a significant increase in light intensity (p=O.Ol). Conclusion: Periodic assessment of light intensity and quality control of light curing units are mandatory.