Because a dental assistant sits during much of the day while seeing patients, dental assistant chairs are a very important consideration when setting up a practice or outfitting an operatory. These stools are designed for both durability and comfort and should help promote ergonomic positioning during treatment. Most stools offer a range of adjustments to help you find a comfortable position. They should also be easy to clean and styled to match the office. Seat shapes vary greatly between stools and can include round, saddle, contour and rectangular. The backrest of a dental assistant chair varies in shape and may be adjustable and feature lumbar support. The armrest should also be adjustable, and some stools include a footrest as well. Be sure to choose a reputable vendor who offers a reliable warranty and replaceable upholstery.