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The PPR welcomes letters from readers on articles and other information that have appeared in PPR or have been posted on the ADA Web site. All communications received will be carefully considered for publication, either in print or online at www.ada.org/goto/ppr. PPR reserves the right to edit all letters and requires that they be signed. By sending a letter to the editor, the author acknowledges and agrees that the letter and all rights of the author in the letter sent become the property of PPR, and acknowledges and agrees that PPR may publish the author's name, city and state. The views expressed in published letters are those of the letter writer and do not necessarily reflect the opinion or official policy of the ADA or its subsidiaries.