Amoxicillin and metronidazole as an adjunctive treatment in generalized aggressive periodontitis at initial therapy or re-treatment: a randomized controlled clinical trial.
Author(s): Griffiths GS, Ayob R, Guerrero A, Nibali L, Suvan J, Moles DR, Tonetti MS
Affiliation(s): University of Sheffield, Academic Unit of Restorative Dentistry, Sheffield, UK. firstname.lastname@example.org
Publication date & source: 2011-01, J Clin Periodontol., 38(1):43-9. Epub 2010 Nov 10.
Publication type: Comparative Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't
BACKGROUND: Previously, we showed that systemic metronidazole and amoxicillin significantly improved the outcomes of non-surgical debridement in generalized aggressive periodontitis patients. This study aimed to observe whether re-treatment with adjunctive antimicrobials would give the placebo group benefits comparable with the test group. METHODS: Thirty-eight of 41 subjects, from the initial 6-month trial, completed the second phase, re-treatment of sites with remaining pockets 5 mm. Subjects on placebo in phase one, received adjunctive antibiotics for 7 days. Clinical parameters were collected at 2 months posttreatment (8 months from baseline). RESULTS: Patients who received antibiotics at initial therapy, showed statistically significant improvement in pocket depth reduction and in the % of sites improving above clinically relevant thresholds, compared with patients who received antibiotics at re-treatment. In deep pockets (7 mm), the mean difference was 0.9 mm (p=0.003) and in moderate pockets (4-6 mm) it was 0.4 mm (p=0.036). For pockets converting from 5 to 4 mm, this was 83% compared with 67% (p=0.041) and pockets converting from 4 to 3 mm was 63% compared with 49% (p=0.297). CONCLUSIONS: At 8 months, patients who had antibiotics at initial therapy showed statistically significant benefits compared with those who had antibiotics at re-treatment. (c) 2010 John Wiley & Sons A/S.