'HIGH SPEED ROTARY INSTRUMENTS IN DENTISTRY'-PAST, PRESENT & FUTURE TRENDS-A REVIEW.

ABSTRACT High-speed rotary instruments have been transformative in dentistry, evolving from rudimentary manual drills to sophisticated air-turbine and electric handpieces that enable precision, efficiency, and improved patient comfort. Historically, dental handpieces began as slow manual devices with limited capability. Over time, mechanization introduced foot-treadle and belt-driven models, culminating in modern air-turbine instruments with speeds up to 400,000 rpm and integrated fiber-optic lighting, enhancing visibility and control. Currently, advances focus on electric handpieces with stable torque, ergonomic designs using lightweight materials, multi-port water cooling systems, and microbial-resistant surfaces, geared towards optimizing restorative and prosthodontic outcomes. Future trends herald integration with digital dentistry and CAD/CAM workflows, IoT-enabled smart instruments providing predictive maintenance and AI-driven operational control, and cordless battery-powered designs improving mobility and ergonomics. Material science will drive the adoption of biofilm-resistant alloys, antimicrobial coatings, and temperature-controlled diamond burs ensuring safety and durability. These innovations hold promise for enhanced clinical precision, efficiency, and patient safety in both general dental and prosthodontic practices. Keywords: High-Speed Rotary Instruments, Dental Handpieces, Air-turbine, Electric Handpiece, Prosthodontics, Cutting efficiency, Ergonomic design.