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目的：比较老年人、青年人牙菌斑溶菌酶活性。方法：琼脂打孔法测定菌斑中溶菌酶含量。结果：两组人群均可检测到溶菌酶。老年组为１．２１±０．５８ｍｇ／每克湿重菌斑，青年组为９．０８±４．５０ｍｇ／每克湿重菌斑，青年组高于老年组，且两组差异具有统计学意义。结论：溶菌酶在菌斑中确实存在，且具有年龄差异
Objective: To compare the activity of dental plaque lysozyme in the elderly and young people. Methods: The agar diffusion method was used to determine the content of lysozyme in plaque. Results: Lysozyme was detected in both groups. The elderly group was 1.21 ± 0.58mg / g wet weight bacterial plaque, young group was 9.08 ± 4.50mg / g wet weight bacterial plaque, young group than the elderly group, and the difference between the two groups was statistically significance. Conclusion: Lysozyme does exist in plaque and has age differences