The Ultradent Opalescence PF Regular Patient Kit is a dentist-supplied and supervised tooth whitening system designed to effectively lighten the internal colors of teeth. The whitening agents in this kit are clear, flavored, high-viscosity, and sticky gels that contain peroxide. The peroxide content is available in two concentrations: 15% carbamide peroxide equivalent and 20% carbamide peroxide equivalent gels.
Both the 15% and 20% carbamide peroxide gels work as strong oxidizing agents to bleach teeth by penetrating the enamel and dentin and oxidizing the offending stains within the tooth. However, the main difference between the two concentrations lies in their strength and effectiveness.