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  2. Perry DA, Beemsterboer PL, Taggart EJ. Periodontology for the Dental Hygienist, 1st ed. Philadelphia: WB Saunders, 1996: 20-22.
  3. Wilkins EM. Clinical Practice of the Dental Hygienist, 8th ed. Philadelphia: Lippincott Williams & Wilkins, 1999: 188-196.

Additional Resources

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