When sourcing child dental chairs, prioritize ergonomic design specifically tailored for pediatric anatomy. Key specs include a low minimum seat height (approx. 400mm) to allow children to get on/off easily, and a synchronized movement system for the backrest and seat to prevent the 'squeezing' sensation. Ensure the motor is a low-noise DC motor (<45dB) to reduce patient anxiety. The upholstery should be seamless, high-density memory foam covered in medical-grade, antimicrobial PU leather that is resistant to chemical disinfectants.