Nickel-Titanium File Fracture Prevention via Liquid Flushing

The patent introduces liquid (water or saline) as an intermediary substance between the nickel-titanium file and the root canal environment. This liquid medium serves as a mediator that reduces direct contact stresses and provides lubrication, thereby decreasing fatigue accumulation in the file while maintaining effective root canal preparation. The liquid acts as a cushioning intermediary that protects the file from harsh mechanical conditions.

The patent converts the potentially harmful effect of liquid exposure into a beneficial one by using controlled liquid irrigation. Instead of avoiding liquid contact entirely, the system uses liquid to provide lubrication and stress distribution, which actually protects the file from more severe damage mechanisms. The liquid, which could potentially cause corrosion, is transformed into a protective medium that extends file life through reduced mechanical fatigue.

The patent applies preliminary protective action by introducing liquid irrigation before significant fatigue damage can occur. The continuous or periodic liquid application during use serves as a preventive measure that reduces stress accumulation and lubricates the interface, thereby preventing the initiation and propagation of transverse cracks that would otherwise occur during repeated use. This preliminary protection enables safe reuse of files.