Anticalculus Effects of a Novel, Dual-Phase Polypyrophosphate Dentifrice: Chemical Basis, Mechanism, and Clinical Response Donald J. White, PhD; Robert W. Gerlach, DDS, MPH A new tartar control ingredient for a dentifrice offers positive advantages for patients in the maintenance of their oral hygiene.  This study details the mechanism of action and efficacy of this new chemistry.
	Effectiveness of Dentist-Prescribed, Home-Applied Tooth Bleaching Richard Niederman, DMD, MS; Maggie C. Tantraphol; Patricia Slinin, DMD; Catherine Hayes, DMD, DMSc; Suzy Conway, MLS This study of the literature indicates that tooth bleaching is effective.  The findings are reported in terms of shade guide units to quantify the clinical significance.
	Tobacco Cessation Intervention: How to Communicate with Tobacco Using Patients Eric E. Stafne, DDS, MSD; Bashar Bakdash, DDS, MPH, MSD Dental professionals are becoming major participants in helping patients become tobacco free for both their improvement of their general health as well as for their oral health.  Communication with tobacco users is a major issue in tobacco cessation programs.
	Endodontic Perforation Repair with Resin-Ionomer:  A Case Report Lawrence G. Breault, DMD, MS; Edward B. Fowler, DDS, MS; COL Patrice D. Primack, DDS, MS Root perforations are significant complications of endodontic treatment, but some can be repaired with resin-ionomer with success as reported here.