The Concept of “Risk” and the Emerging Discipline of Periodontal Medicine David W. Paquette, DMD, MPH, DMSc; Phoebus Madianos, DMD, PhD; Steven Offenbacher, DDS, PhD; James D. Beck, PhD; Ray C. Williams, DMD This article clarifies the concept of risk, traces the emergence of periodontal medicine, and serves as a resource for the oral health professional in assessing and utilizing the current evidence on periodontal-systemic disease connections.
	Use of a Whitening Dentifrice for Control of Chlorhexidine Stain Terri S. I. Tilliss, RDH, MS, MA A major drawback to clinicians prescribing and patients using chlorhexidine rinse is the development of extrinsic staining.  This article presents the advantages of recommending a specific whitening dentifrice that has demonstrated stain suppression when prescribing a chlorhexidine mouthrinse.
	Diagnosis and Management of Dental Erosion Beatrice Kay Gandara, DDS, MSD; Edmond L. Truelove, DDS, MSD This article reviews the etiologies of dental erosion and provides recommendations for diagnosis and management of this problem.
	Root Coverage Using Alloderm® Acellular Dermal Graft Material Robin D. Henderson, DMD; Connie H. Drisko, DDS; Henry Greenwell, DMD, MSD This report describes a surgical technique for root coverage using an acellular dermal graft material and a coronally positioned flap.  The results from this case series conform with the available evidence on the use of acellular dermal graft material in root coverage procedures.