Module 5 - Chemotherapeutics, Irrigation, and Desensitization Spring 2025 STUD

Module Overview

  • Module Title: Module 5 - Chemotherapeutics, Irrigation, & Desensitization

  • Course: DH 313

  • Term: Spring 2025

Non-Surgical Therapeutic Approaches to Periodontitis

  • Non-surgical treatments aim to manage gingival and periodontal diseases without invasive procedures.

  • Mechanical Debridement: Initial step critical for all non-surgical approaches.

Chemotherapeutics and Antimicrobials

  • Definition: Utilize agents to target periodontal pathogens, potentially altering the host response.

  • Source: American Academy of Periodontology (AAP)

  • Role: Adjuvant treatment to periodontal debridement.

Therapeutic Requirements for Chemotherapeutics

  • Effectiveness: Must target specific pathogens.

  • Concentration: Needs sufficient levels to penetrate biofilms and remain effective.

    • Chlorhexidine is bactericidal with short exposure; Tetracycline is bacteriostatic, requiring longer exposure.

  • Substantivity: Ability to adhere to tissue, creating a reservoir to combat gingival fluid clearance.

Chemotherapeutic and Antimicrobial Agents

Why Tetracycline?

  • Concentrates in gingival crevicular fluids.

  • Effective against Aggregatibacter actinomycetemcomitans and inhibits collagenase growth.

Systemic Delivery of Antimicrobials

  • Indications: For aggressive periodontitis.

  • Administration Routes: Oral, injection, or IV; medications are distributed through the bloodstream.

  • Gingival Crevicular Fluid: Changes frequently, requiring effective delivery.

Common Systemic Antibiotics in Periodontics:

  • Penicillin and its derivatives (Amoxicillin, Ampicillin, Augmentin)

  • Tetracycline

  • Metronidazole

  • Ciprofloxacin

  • Clindamycin

Successful Use of Antibiotics in Therapy

  • Must identify host defenses and antibiotic susceptibility through culture.

  • Ensure the pathogen remains sensitive to the prescribed antibiotic to prevent resistance.

Systemic Enzyme Suppression Therapy - Periostat®

  • Active Ingredient: Doxycycline hyclate

  • Dosage: 20 mg twice daily, for 3 to 9 months.

  • Indications: Adjunct to mechanical debridement in chronic periodontitis.

  • Mechanism: Inhibits collagenase, modulating host response without impacting bacteria.

Contraindications

  • Allergies to Tetracycline

  • Children under 8 years, pregnant or nursing women.

Side Effects

  • Renal toxicity, photosensitivity, headaches, gastrointestinal upset.

Local Chemotherapeutic Approaches

Application Types:

  1. Topical Supragingival: Mouth rinses, dentifrices, oral mucosa applications.

  2. Subgingival: Oral irrigation, delivering chemotherapeutics directly to infection sites.

Goals of Oral Irrigation

  • Attack loosely attached plaque, reduce microbial count, and serve as adjunct therapy to debridement.

Professional and At-Home Oral Irrigation Devices

  • Various devices are designed for professional and home use, enhancing oral hygiene and treatment efficacy.

Research Findings on Irrigation

  • Single Professional Application: No significant benefit noted over non-surgical approaches alone.

  • Multiple Applications: Insufficient evidence to support additional benefits from repeated professional irrigation.

Agents for Subgingival Irrigation

  • Chlorhexidine (0.12%), Listerine (full strength), Stannous Fluoride (diluted).

Controlled Release Devices

  • Delivery of drugs directly into the periodontal pocket with time-release mechanisms (fibers, chips, gels).

Objectives of Controlled Delivery Devices

  • Reduction of pocket levels, improved bleeding control, and progression of disease elimination.

Locally Administered Antimicrobials

Examples:

  • ARESTIN (Minocycline HCI): Locally delivered microspheres as adjunct to scaling and root planing.

  • ATRIDOX (Doxycycline Hyclate): Gel system for subgingival delivery with sustained release.

  • PerioChip (Chlorhexidine Gluconate): Biodegradable chip for treating periodontal pockets.

Patient Education and Administration Guidelines

  • Importance of mechanical debridement, contraindications, and potential side effects must be communicated to patients.

Use of Antibiotics in Periodontitis Treatment

  • Antibiotics should be adjunctive and prescribed selectively to avoid resistance.

Inappropriate Uses of Antibiotics in Dentistry

  • Avoid using antibiotics to prevent infection in healthy patients or in lieu of mechanical therapy.

  • Misuse can lead to bacterial resistance, impacting future treatments.

Dentinal Hypersensitivity Management

  • Fundamental Origin: Hydrodynamic theory addressing surface disturbances/stimuli leading to sensitivity.

  • Management Options:

    • Chemical: Potassium salts, fluorides, and professional treatments.

    • Natural Desensitization: Formation of secondary dentin and smear layer development.

Sensitivity Control Products

  • THERMA-TROL™: Potassium oxalate gel for immediate relief.

  • MI PASTE Plus®: Delivers calcium/phosphate to strengthen enamel and reduce sensitivity.

  • Colgate Sensitive Pro-Relief: Uses arginine and calcium carbonate technology.

Conclusion

  • Understanding the use of chemotherapeutics, effective irrigation techniques, and desensitization approaches are critical in managing periodontal disease and improving patient outcomes.