What's New?
.	HPS and CRCPD Proclaim 8-14 November 2009 as National Radiation Protection Professionals Week
.	November Newsletter
.	NRC Academic Program Nuclear Education Grants, FY2010, Now Accepting Applications
.	November ORS
.	November Journal
.	EPA's STAR Graduate and GRO Undergraduate Fellowship Funding Now Accepting Applications

Upcoming Events
.	2010 HPS Midyear Topical Meeting Radiation Risk Communication to the Public 24-27 January 2010 Albuquerque, NM
.	2010 HPS Professional Development School Radiation Risk Communication: Issues and Solutions 27-29 January 2010 Albuquerque, NM

07 November 2009

Answer to Question #2215 Submitted to "Ask the Experts"

Category: Consumer Products — Watches, Clocks, and other Glow-in-the-Dark

The following question was answered by an expert in the appropriate field:

The answer to your Ask the Expert Question #1234 under uranium suggests that depleted uranium is used in dental porcelain and in false teeth. Is that true? If this was done in the past, when did they stop using this material? How much uranium do they add?

Uranium was used in porcelain dentures to give them a fluorescence similar to that of natural teeth. It was added as a mix of cerium oxide and uranium oxide or as sodium uranate. The uranium composed from 0.008 to 0.1% by weight uranium with an average of about 0.02%. The practice appears to have stopped in the late 1980s.

Paul Frame, CHP, PhD

Answer posted on 9 April 2003. The information and material posted on this Web site is intended as general reference information only. Specific facts and circumstances may alter the concepts and applications of materials and information described herein. The information provided is not a substitute for professional advice and should not be relied upon in the absence of such professional advice specific to whatever facts and circumstances are presented in any given situation. Answers are correct at the time they are posted on the Web site. Be advised that over time, some requirements could change, new data could be made available, or Internet links could change. For answers that have been posted for several months or longer, please check the current status of the posted information prior to using the responses for specific applications.