The testing resource of choice for dental hygienists, Mosby's Comprehensive Review of Dental Hygiene 4/e features comprehensive coverage, more than 900 review questions as well as rationales, test-taking tips and important content on legal and ethical issues. A mock exam reflecting the recent reformatting of the actual exam allows students to test their understanding of key concepts - making this a well-organized, essential study tool. Features: New to this edition: * Case based questions provide students with everyday situations and helps them problem-solve in order to achieve a logical solution. * Updated information on AIDS. * Discussion of community and homebound healthcare versus individual healthcare updates the reader on current trends in private practices with a greater emphasis on issues of self-regulation, quality assurance and relaxed supervision. * Updated information on oral manifestations of AIDS, resistant tuberculosis, information regarding the use of DNA probe testing, use of tetracycline fibres and periodontal debridement versus root planing, use of sonic powered toothbrushes, Teflon floss, and an age-targeted prevention paradigm for dental hygienists to follow.