Wiedemann W, Lahrsow J, Naujoks R
Dtsch Zahnarztl Z. 1979 Jan;34(1):6-9.
The distribution and degree of severity of periodontal diseases depends on many different factors. One of the factors, periodontal resistance, was studied in 62 subjects. The test with experimental gingivitis showed that the dividing the subjects into periodontal-resistant and periodontal-insufficient groups led to more differentiated results.
牙周疾病的分布和严重程度取决于许多不同因素。其中一个因素，即牙周抵抗力，在62名受试者中进行了研究。实验性牙龈炎测试表明，将受试者分为牙周抵抗力强和牙周抵抗力弱的两组会得出更具差异的结果。
