This TRINY TDB13 dentist stool features ergonomic design and can provide you a ergonomic backrest fitting your lumbar to effectively moderate the pressure of spine. All movements are activated by sublateral levers and seat height adjusted by a gas lift cylinder enabling smooth motions and positioning at the desired height, allowing the dentist to sit comfortably. Backrest can also be tilted. Adopting ergonomic design that fits back curve, the standard dentist stool cares for your waist, back and neck to effectively relieve fatigue. This dentist chair is very simple to setup and install at anytime anywhere with a few simple steps.