All FINNDENT chairs have four easily programmable automatic positions including a “return-to-last-position” setting that drives the chair back to the last used position. The easily adjustable, ultra rigid two-pivot neck rest allows excellent unrestricted access to the oral cavity. One unique feature of the FD 5100 chair is the “Quick Click” length adjustable backrest. This allows the backrest to be slid down so that even children and small adults can comfortably sit in the chair and easily reach the neck rest.