Fully revised and updated to reflect changes in clinical practice, legislation and regulation, this groundbreaking textbook intertwines the subjects of dental hygiene and dental therapy to provide a comprehensive resource for students of these courses, as well as those studying new degree programmes in oral health science. Following course developments and an expansion in the remit of both hygienists and therapists, this book has been written not only for students, but as a revision and updating manual for those already in practice.