Table 6 Overview of three improved methods of root canal files
Improvement type | Method | Key technology | Advantage | Limitation |
|---|---|---|---|---|
Material | Matrix | Ultrafine crystal Heat treatment 3D printing | Flexibility Anti-fatigue | Tedious process steps High manufacturing cost |
Surface | Polishing Magnetron sputtering process Coating Technology | Corrosion resistance Inhibition of ion precipitation | Unstable surface coating Low utilization of target material | |
Geometry | Special-shape | Improvement of internal force/external force Geometric theory | Large preparation space Adaptation of root canal alignment | Inadequate cleaning strength Unstable files structure |
Special-structure | Composite structure theory Stress theory | Easier to carry the chemical irrigation agent into the root canal Prevention of stress concentration | Debris tends to get stuck in the root canal files Weak chip removal function | |
Special-section | Full use of shape and structure information Eccentric section design theory | Large chip space Easier access to the root apex | Manufacturing complexity Eccentric structure is easy to lose control | |
Function | Anti-fall | Structural Design Composite principle | Good grip stability Easy replacement of root canal files | Bulky and heavy Easily stained with dirt |
Anti-infection | Ultrasound Technology Optical therapy technology | Easy to clean dentin Treatment of root canals and endodontics | Expensive to manufacture Difficult to operate | |
Anti-error | Use of special structures Micro Photography | No apical perforation Security Ability to measure root canal length | Cannot precisely determine root canal depth The parts are small and inconvenient to operate |