Effect of damage or contamination to the tips of 200 light-curing units.

Objective: The light-curing unit (LCU) has become a vital piece of dental equipment that must be correctly maintained. This study investigated the impact of contamination and physical damage to the light tip on the power and radiant emittance values from old and new LCUs.

Materials And Methods: Two investigators assessed 200 LCUs in dental clinics.