The COXO PT-Master is a combined ultrasonic scaler and air polishing system designed for professional dental cleaning and periodontal therapy. The device is intended for dentists and prophylaxis specialists who require efficient, tissue-friendly, and comprehensive cleaning of both supra- and subgingival areas. The ultrasonic scaler operates with high-frequency vibrations that enable the effective removal of tartar and calculus. The controlled vibration intensity ensures targeted cleaning, while the cavitation effect supports the removal of plaque. This allows for precise yet gentle treatment of tooth surfaces. The integrated air polishing system complements the mechanical cleaning with a powder-water-air mixture used to remove biofilm and stains. This combination enables thorough cleaning even in hard-to-reach areas and significantly improves the surface quality of the teeth. The system's power control is finely tuned and allows for individual adjustment to different clinical situations. This allows for efficient treatment of both sensitive tissue and heavy deposits. Consistent performance ensures uniform treatment quality. The ergonomic handpiece design supports precise guidance and reduces fatigue during extended treatments. The intuitive control unit enables quick selection of operating modes and facilitates switching between scaling and air polishing functions. The PT-Master is designed for continuous clinical use. High-quality materials and a robust construction ensure reliability and compatibility with common hygiene standards and sterilization procedures. Cleaning and maintenance of the system are designed to be practical and efficient. In summary, the COXO PT-Master offers a versatile and powerful solution for professional dental cleaning. The combination of ultrasonic scaling and air polishing enables comprehensive prophylaxis treatment with high precision, efficiency, and patient comfort.