This study will look at the safety of using the study medicine for a long time. It will see if the germs get used to the medicine, making it not work as well, if it's used by people with gum disease for a long time.
Primary Outcome Measures:
- Change in the proportion (percent) of minocycline-resistant bacteria (as measured by bacterial culture) for whole, unstimulated saliva and subgingival plaque [ Time Frame: from Baseline to Day 730 +/- 60 days ] [ Designated as safety issue: No ]
Secondary Outcome Measures:
- Changes in the proportion (percent) of minocycline-resistant bacteria for saliva and subgingival plaque and total number of minocycline-resistant bacteria [ Time Frame: from Baseline to all other time points (i.e., Days 30 to 635) ] [ Designated as safety issue: No ]
- Identification of minocycline-resistant species within a panel of 40 representative periodontal species [ Time Frame: from baseline to all other time points through Day 730 ] [ Designated as safety issue: No ]
| Enrollment: |
35 |
| Study Start Date: |
December 2007 |
| Study Completion Date: |
February 2009 |
| Primary Completion Date: |
February 2009 (Final data collection date for primary outcome measure) |
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Minocycline HCl microspheres: Experimental
Minocycline HCl microspheres
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Drug: Minocycline HCl microspheres
At Baseline and all interim visits, a single unit dose of 1mg minocycline HCl (with approximately 3mg PGLA) will be professionally administered subgingivally into periodontal pockets at each site exhibiting a PD ≥ 5mm.
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No drug intervention: No Intervention
No drug intervention
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The objective of this study is to evaluate the changes in populations of minocycline-resistant bacteria after long-term use of minocycline HCl microspheres, 1 mg in subjects with moderate-to-severe chronic periodontitis. This will be assessed through monitoring the total number and proportion of minocycline-resistant bacteria and the identity of minocycline-resistant species within a panel of 40 representative periodontal species in saliva and subgingival plaque.