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Topical chemotherapy of periodontal disease using several drug delivery systems (DDS) is currently being attempted. PT-01 is a DDS which consists of fast- and sustained- release parts containing ofloxacin as an antibacterial agent. Since PT-01 was found to sustain the antibacterial effect for 7 days in a periodontal pocket, it was used tor periodontal patients without root planing or scaling in this study. PT-01 and a placebo were applied to two separate and opposite pockets of 46 patients, once a week from the first visit (week 0) to week 3. The clinical parameters (plaque index, gingival index, tooth mobility, bleeding on probing, pus discharge, and probing depth) were evaluated from weeks 0 to 4. At the end of the test (week 4), global improvement at the two sites was assessed. The clinical parameters and the global improvement of the PT-01 and placebo-treated sites were compared statistically. All parameters at the PT-01 sites except for tooth mobility showed much greater improvement than at the placebo sites. The global improvement of PT-01 sites was also significantly greater than that of the placebo sites. No side effects could be seen in patients treated with PT-01. These results indicate that topical chemotherapy using PT-01 could be effective and safe for periodontal therapy.

Topical chemotherapy of chronic periodontitis using controlled-release insert containing ofloxacin (PT-01) without root planing.