There is concern with decreasedair quality and potential aerosol contamination in the dental operatory. This problem has been addressed by the Centers for Disease Control and Prevention, which recommends that all sources of blood‐contaminated splatter and aerosols be minimized. One of the major sources of potential aerosol contamination in the dental setting is the ultrasonic sealer. This study looks at the use of a high volume evacuator attachment for the ultrasonic sealer handpiece. Artificial teeth were mock‐scaled for 1 minute with and without the evacuator attachment. The mock scaling was performed within a plastic enclosure that had a 1 cm grid laid out on 4 sides. Scaling was performed 10 times each by 2 operators. An erythrosin solution was used for the ultrasonic sealer coolant with a coolant volume of 17.5 ml/min. The number of squares containing a red erythrosin spot were counted and considered to represent aerosol contamination. The high volume evacuator attachment produced a 93% reduction in the number of contaminated squares (chi squared significant atP<0.05). There was no increase in heat transfer to a tooth analogue when the high volume evacuator attachment was used with the ultrasonic sealer as compared to the sealer without the evacuator attachment. It is felt that the high volume evacuator attachment is capable of significantly reducing the amount of aerosol contamination produced within the test system without increased heat transfer to the tooth.J Periodontol 1996;67:28–32.