The combi-suction unit is a suction unit with an integrated separation unit. Separation within the treatment station (e.g. chair) is no longer necessary. The suction unit separates the fluids and solid particles sucked up during treatment from the air using a two-step separation system of cyclone separator and separation turbine. The separation turbine is especially effective at preventing fluids and blood foam from being sucked into the turbine section of the suction unit. The fluids sucked up are continually being rotated at high speed and transported to the waste system; thus, there is no interruption of suction due to the system being too full. The suction system is mounted on rubber mountings, which reduce vibration and operating noise.