8Poulsen P. Retention of glassionomer sealant in primary teeth in young children[J]. Eur J Paediatr Dent,2003 ,4(2) :96 -98.
9Pardi V, Pereira A C, Mialhe F L, et al. A 5-year evaluation of two glass-ionomer cements used as fissure sealants [ J ]. Community Dent Oral Epidemiol, 2003,31 ( 5 ) : 386 - 391.
10Hossain M, Nakamura Y, Kimura Y ,et al. Effect of pulsed Nd : YAG laser irradiation on acid demineralization of enamel and dentin [ J ]. J Clin Laser Med Surg,2001,19(2) :105 - 108.
