6Mathew J, Casamassimo PS, Wilson S, et al. Effect of dental treatment on the lung function of children with asthma[J]. JADA, 1998, 129(10): 1120-1128.
7Mills SE. The dental unit waterline controversy defusing the myths defining the solutions[J]. JADA, 2000,131(10):1427-1440.
8Bagga BS, Murphy RA, Anderson AW, et al. Contamination of dental unit cooling water with oral microorganisms and its prevention. J Am Dent Assoc,1984,109:712-716.
9Montebugnoli L, Dolci G. Effectiveness of two devices designed to prevent fluid retraction in a high-speed handpiece. J Prosthet Dent,2000,84:225-228.