Press Releases Independent Study Confirms Discus Dental’s ZOOM!™ Lamp Significantly Increases Tooth Whitening Results Culver City, CA (November 25, 2002) — An independent study just conducted by Hill Top Research, a leading contract clinical research firm, confirmed the significance of Discus Dental’s ZOOM! Lamp to achieving dramatic results with the ZOOM! Chairside Tooth Whitening System. The Hill Top study confirmed that ZOOM!’s light- activation system significantly enhances the bleaching performance of the ZOOM! Whitening Gel. Results of the Clinical Study – Light Activation The objective of this clinical study was to compare the whitening/bleaching efficacy of Discus Dental ZOOM! Chairside System (25% Hydrogen Peroxide whitening gel) with and without the ZOOM! Lamp according to a chromatically arranged Vita® Shade Guide. Shade improvement gained from the ZOOM! Chairside System with the ZOOM! Lamp was significantly better than the product without the lamp at all time points; post-treatment, this difference in improvement was over 2 shades. According to the study, “The results confirm that although the 25% hydrogen peroxide whitening gel clearly whitens/bleaches the teeth, the presence and use of the ZOOM! light activator significantly enhances the performance (whitening/bleaching) ability of the system.” A full abstract on this study can be found in the new ZOOM! Online Research Center located on Discus Dental’s website: www.discusdental.com. About Discus Dental About Discus Dental: Founded in 1993, Discus Dental, Inc. is a leader in the dental industry in the marketing and distribution of premium aesthetic and clinical products to dental professionals. The company also provides practice building tools and services as well as expert industry training for the dental community. Discus Dental is headquartered in Culver City, California. More information is available at www.discusdental.com.