Section 872.6250 - Dental chair and accessories(a)Identification. A dental chair and accessories is a device, usually AC-powered, in which a patient sits. The device is intended to properly position a patient to perform dental procedures. A dental operative unit may be attached.(b)Classification. Class I. The dental chair without the operative unit device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter.55 FR 48439, Nov. 20, 1990, as amended at 59 FR 63009, Dec. 7, 1994