To establish and compare maximum methemoglobin blood levels and times to maximum methemoglobin blood levels following the administration of the injectable local anesthetics prilocaine and lidocaine when used for dental treatment in pediatric patients under general anesthesia. Patients will be randomized into three equal study groups. Two of the study groups will receive local anesthetic and the third group will not. Methemoglobin blood levels will be non-invasively monitored and recorded throughout dental treatment for all groups using a Masimo Radical-7 Pulse Co-Oximeter device.
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Peak Methemoglobin Blood Levels
Timeframe: Measured at 10 second intervals during dental treatment for an average of 2 hours