Ultrasonic Cartilage Excision System

The patent replaces the traditional mechanical rotation-based excision system with an ultrasonic vibration-based excision system. The ultrasonic excision device uses high-frequency vibrations to excise cartilage through cavitation and mechanical erosion effects, eliminating the need for rotational contact that causes surface roughness. This substitution of the excision mechanism fundamentally resolves the contradiction between excision efficiency and surface smoothness.

The patent changes the operational parameters from mechanical rotation to ultrasonic vibration at specific frequencies. By controlling the ultrasonic vibration parameters (frequency, amplitude, and contact pressure), the system achieves efficient cartilage excision while maintaining a smooth surface. The parameter change from rotational speed to vibrational frequency allows precise control over the excision process.

The patent applies local quality by concentrating ultrasonic energy only at the precise treatment site where the excision tip contacts the cartilage. The ultrasonic vibration generates localized mechanical erosion and cavitation effects that excise cartilage without requiring high temperatures. This localized action ensures that surrounding tissues remain unaffected, resolving the contradiction between excision efficiency and heat damage to adjacent structures.

The patent replaces thermal excision mechanisms with ultrasonic mechanical vibration mechanisms. Instead of using heat to excise cartilage, the system uses controlled ultrasonic vibrations that create cavitation bubbles and mechanical erosion at the tissue interface. This mechanical substitution eliminates the need for high temperatures while maintaining effective cartilage excision, thereby preventing heat insult to surrounding tissues.