A pressure-regulating, handheld adapter receiving pressurized air from a coupling of a dental chair. A disposable, micro-abrasive dental blasting tip fits into the handheld adapter. The adapter regulates air pressure being supplied to the tip, and is adjustable. The resulting combination/assembly of adapter and tip constitutes a pressure-regulated, micro-abrasive, dental blasting device which may be used for dental air abrasive and prophylaxis procedures. The handheld adapter may include a detritus evacuation portion.