Effective surface sterilization of gutta-percha points.

Area of Science:

• Endodontics
• Microbiology
• Dental Materials Science

Background:

• Gutta-percha points are commonly used in root canal fillings.
• Effective sterilization of gutta-percha is crucial for endodontic treatment success.
• Identifying potent germicidal irrigants is essential for preventing intraradicular infections.

Purpose of the Study:

• To evaluate the surface sterilization efficacy of various endodontic irrigants on gutta-percha points.
• To compare the antimicrobial activity of different chemical agents against bacteria and fungal spores.

Main Methods:

• A bacteriologic investigation was performed on gutta-percha points.
• Points were treated for 5 minutes with specific concentrations of sodium hypochlorite (4.50%), Zephiran (0.53%), and hydrogen peroxide (3.00%).
• Effectiveness was assessed against gram-positive and gram-negative bacteria, endospores, and fungal spores.

Main Results:

• Sodium hypochlorite, Zephiran, and hydrogen peroxide showed high effectiveness in surface sterilization.
• These agents were potent against gram-positive and gram-negative bacteria and endospore-forming microorganisms.
• Fungal spores were eradicated by sodium hypochlorite and Zephiran, but not by hydrogen peroxide.

Conclusions:

• A 5-minute treatment with sodium hypochlorite, Zephiran, or hydrogen peroxide is highly effective for gutta-percha surface sterilization.
• These irrigants exhibit broad-spectrum antimicrobial activity, crucial for endodontic disinfection.
• Ethanol, chloroform, eugenol, betadine, and Gram's iodine were ineffective for surface sterilization of gutta-percha points.