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Friday, June 30, 2000

Periodontics MCQ Answer 04

Friday, June 30, 2000

Answer: (d)

  1. is true

  2. is true; if indicated, osseous repair surgery on keratinized tissues is less technically demanding.

  3. is true; this requires a definitive diagnosis, comprehensive therapy, and effective maintenance.

  4. false; bone grafting may include GTR for the ailing or failing implant; regenerative procedures, including bone grafting with or without GTR are most appropriate when the adjacent osseous crest is close to the rim of the implant in narrow two- or three- walled moat, dehiscence or fenestration defects.

  5. true; a 30 second to 1 minute application of a supersaturated solution of citric acid (pH1) burnished with a cotton pledget may be beneficial in detoxifying the infected hydroxyapatite-coated implant surface. If the coating is rough or pitted, ultrasonic or air/powder abrasives is necessary to remove the HA. Then a short application of the air/powder abrasive detoxifies the surface of the Ti implant

Critical Decisions in Periodontology by Hall, 4th Ed. Chapters pp260-261


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