This book is a revised and updated version of the original textbook covering the needs of preclinical and postgraduate dental students. It should also be useful to those dental practitioners who wish to keep abreast with rapidly developing aspects of biochemistry and molecular biology and the ways in which they are relevant to oral biology. Beginning with structural aspects of biological compounds and the organization of macromolecules, the book proceeds via nutrition and metabolism to topics of specific dental interest - soft tissues, hard tissues and the biology of the mouth. The text also covers plaque and oral disease and its prevention.