2534 Effect of Infection Control Barriers on Curing Light Output

Friday, March 18, 2011: 3:30 p.m. - 4:45 p.m.
Location: Hall C (San Diego Convention Center)
Presentation Type: Poster Session
C. LEE, R.B. PRICE, and C. FELIX, Dental Clinical Sciences, Dalhousie University, Halifax, NS, Canada

Objectives: This study compared the effect of disposable infection control barriers on the energy delivered from the curing light.

Methods: Seven disposable barriers were tested: a cut-off Diamond Grip Plus Glove, Steri-shield Cure Elastic, Pinnacle Cure Sleeve, Denstply Disposa Shield, Magna Barrier Sleeve, Pinnacle DEMI 250, PVC plastic wrap. The same Elipar S10 curing light was used throughout the study for 10 seconds. An Ocean Optics spectrometer inside a MARC(BlueLight analytics) energy measurement system was used to record the effect each barrier had on the energy delivered to simulated restorations. The spectrometer was calibrated according to a NIST referenced light source. The tip of the guide was placed directly over the anterior and then the posterior sensor in MARC. The energy (J/cm2) delivered in 10 seconds was recorded five times by the same operator using each type of barrier. New barriers were used for each recording. ANOVA and Fisher's PLSD tests were used to compare differences in energy delivered, α=0.05.

Results: Two-way ANOVA showed that the energy values delivered through each barrier were different. The use of no barrier over the light guide delivered the greatest energy, and the use of a cut-off glove delivered the least. Using a cut-off glove resulted in a 54%(Anterior)/76%(Posterior) reduction in the mean(SD) energy delivered. The Steri-shield, Cure Elastic and the Pinnacle Cure Sleeve resulted in 20%(Anterior)/64%(Posterior) reductions in energy delivery. Of the commercial products tested, Magna Sleeve, Dentsply Disposa Shield and Pinnacle DEMI 250 resulted in lesser amounts of energy reduction. Polyvinyl food wrap resulted in the least.

Conclusions: When using a protective barrier, clinicians need to increase the curing times to deliver the same amount of energy as they would without a protective barrier.

BlueLight analytics and Dalhousie University supported this research.

Keywords: Composites, Curing lights, Dental materials and Disinfection/sterilization