Saliva pH has no significant difference between cary incidence and number of caried teeth . SIgA and lysozyme contents of cary children is higher than that of non-cary children . SIgA and lysozyme play important role in dental cary pathogenesis .

• 无龋儿童与患龋儿童唾液 pH值无明显差异 ,患龋儿童SIgA及溶菌酶含量较无龋儿童低 ,SIgA及溶菌酶在龋病发病中起重要作用。