This patient chair is to be used in connection with a portable treatment unit, preferably SIROBOY T by Siemens, for dental treatment in remote regions and anywhere that stationary equipment cannot be installed seat height adjustment by means of a gas spring with scissor-lever synchronous seat inclination and back rest adjustment by means of a gas spring The headrest, with a head wedge cushion, is infinitely adjustable and can be secured The one-piece upholstery is secured with Velcro straps Telescopic support legs and a levelling screw ensure the stability of the chair A stainless steel cuspidor with waste tank and halogen surgical light can also be installed (adapter necessary) For transportation, simply fold the chair away and pack it into an aluminium transport box with the cuspidor and halogen lamp