Philstrom BL, Thorn HL, Folke LE. The effect of periodontal dressing on supragingival microorganisms. J Perio, 48:440,1977.

This study evaluates the effect of periodontal dressing alone and in combination with sub-gingival curettage on the growth of viable supragingival microorganisms

Materials and Methods

• 5 Patients 26-48 years old
• 3 separate phases: supragingival plaque material collection from the gingival 1/3 of the tooth
  1. Control =anstention from OH without application of perio dressing
  2. Application of zinc eugenol dressing
  3. Sub-gingival curettage was performed. followed by application of perio dressing.
• Supragingival plaque samples were collected after each of 2 consecutive 7-day intervals during each phase.
• Aerobic and anaerobic incubation were used. Gram Stains

Results

• Application of the selected periodontal dressing did not affect the wet weight of plaque-like material when compared to the same surfaces without dressing.
• No difference in weight of material was found following subgingival curettage combined with dressing as compared to the use of dressing without curettage.
• Number of total microorganisms decreased significantly after curettage + dressing compared to the same site before surgery + dressing.
• No consistent inhibitory effect upon the growth of total viable organisms was found by application of periodontal dressing.

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