In this course, the history and development of ultrasonics in periodontal therapy is traced. Factors in the development of periodontal disease are presented as well as a comparison of the efficacy and advantages of ultrasonic as opposed to hand instrumentation in periodontal debridement.
Viral hepatitis is transmitted enterically and parenterally by a group of related pathogens. Hepatitis A, B, C, D, and E have been extensively studied, but many questions remain about the clinical implications of F and G.