Walking dental hygiene students step-by-step through the how to-not just the what and why-of using periodontal and root instruments, this Enhanced 8th Edition of Jill Gehrig's definitive resource features new chapters, new online technique videos, updated coverage of the latest evidence-based techniques and equipment, and an expanded array of online teaching and learning resources.Designed to make it easy for students to learn instrumentation, this practical book first takes students through basic skills-patient positioning, intraoral finger rests, and basic instrumentation-then covers advanced techniques, including assessment of periodontal patients and instrumentation of the root branches of multirooted teeth, root concavities, and furcation areas.