The primary emphasis of this volume is to present specific content areas covered by Part I of the National Board Examinations. Authors well versed in the basic principles and current practices in dentistry have written about the basic sciences, as presented in the content outline from the American Association of Dental Examiners. A secondary purpose of this volume is to establish or reinforce for both dental student and dentist a grasp of biologic facts and concepts is critical to the delivery of quality of dental care.