Right and Left Piezon for use with EMS Piezon devices Efficacy in heavy calculus removal They are time saving, especially during initial periodontal therapy and are indicated for adult patients. Smooth and as thin as a periodontal probe. Left and right angulations provide complete accessibility to all tooth surfaces, including furcations with optimal ergonomics. The design of PSR and PSL Instruments provides a unique combination of efficiency and movement linearity. Non-Latex