1Foley J. A prospective study of the use of nitrous oxide inhalationsedation for dental treatment in anxious children[J]. Eur J Paediatr Dent,2005,6(3) :121.
2Moore PA, Nahouraii HS, Zovko JG, et al. Dental therapeutic prac-tiee patterns in the US I. Anesthesia and sedation[J]. Gen Dent,2006,54(2) : 92.
3Foley J. Efficacy of nitrous oxide inhalation sedation and first permanent molar tooth extractions[J]. SAAD Dig, 2007,23 (1) : 3.