Cutting ability of Heliosonic, Rispisonic, and Shaper files

Area of Science:

• Endodontics
• Dental Materials Science
• Biomaterials Engineering

Background:

• Sonic endodontic files offer an alternative to rotary instruments for root canal preparation.
• Understanding the cutting efficiency of different sonic file systems is essential for clinical success.
• The MM 1500 sonic handpiece is a device utilizing sonic vibrations for file activation.

Purpose of the Study:

• To investigate and compare the cutting ability of Heliosonic, Rispisonic, and Shaper sonic files.
• To evaluate the influence of key variables including file type, power, width, and load on cutting performance.
• To provide evidence-based recommendations for optimizing sonic file usage in endodontic procedures.

Main Methods:

• A model system using bovine bone sections was employed to assess cutting ability.
• Four variables were systematically manipulated: file type (Heliosonic, Rispisonic, Shaper), power, width, and load.
• A 3(4) full factorial design with two replications was utilized, with new files and water irrigation for each test.

Main Results:

• All evaluated variables (load, file type, power, width) demonstrated statistically significant differences in cutting ability (ANOVA, p < 0.001).
• Applied load was identified as the most influential factor affecting cutting performance.
• File type, power, and width also significantly impacted the cutting efficiency of the sonic files.

Conclusions:

• Load is the primary determinant of cutting efficiency for sonic endodontic files.
• Appropriate selection of file type and proper application against the root canal wall are critical for achieving optimal cutting.
• Clinicians should consider these factors to enhance the effectiveness of sonic instrumentation during root canal treatment.