Effect of Therapy on Periodontal Infections

Area of Science:

• Periodontology
• Microbiology
• Host-pathogen interactions

Background:

• Periodontal disease progression is multifactorial, requiring pathogens, a conducive environment, and host susceptibility.
• Effective therapy targets these factors to halt disease progression.

Purpose of the Study:

• To examine the biological basis of periodontal treatment success or failure.
• To compare the efficacy of different adjunctive systemic agents alongside surgical and non-surgical periodontal therapy.

Main Methods:

• Seventeen subjects with progressive periodontal disease received Widman flap surgery, scaling, and one of four adjunctive agents: amoxicillin/clavulanate potassium, ibuprofen, tetracycline, or placebo.
• Clinical measurements and subgingival plaque samples were collected pre-treatment and 12 months post-treatment.
• Microbiological samples were enumerated using DNA probes for specific periodontal pathogens.

Main Results:

• All treatments led to pocket depth reduction and attachment gain.
• Post-therapy, key pathogens like Porphyromonas gingivalis and Bacteroides forsythus decreased, especially with antibiotic use.
• Sites with significant attachment loss post-therapy showed increased P. gingivalis and B. forsythus counts, particularly in older subjects with high antibody titers to specific bacteria and low initial bacterial counts.

Conclusions:

• Systemic antibiotics may enhance periodontal treatment outcomes by reducing specific pathogens.
• Host factors, including age and immune response, may influence treatment success.
• Understanding the interplay between microbial load, host response, and treatment is crucial for managing periodontal disease.