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作者对１０５名４．５～５．５岁幼儿的牙龈炎指数ＧＩ和菌斑指数（ＱＨＩ）进行了详细调查，结果显示幼儿均患不同程度之不洁性龈炎。以受检牙数计，阳性率为６５．０２％、１０５名幼儿ＧＩ均值为０．７１±０．２７，ＱＨＩ均值为３．３５±０．５１，男女间无差异。ＧＩ与ＱＨＩ间有正相关关系。调查表明幼儿不洁性龈炎之普遍性与其口腔卫生状况有密切关系。
The authors conducted a detailed survey of gingivitis index GI and plaque index (QHI) in 105 children aged 4.5 to 5.5 years and found that young children had varying degrees of dirty gingivitis. According to the number of examined teeth, the positive rate was 65.02%. The GI mean of 105 children was 0.71 ± 0.27, and the mean of QHI was 3.35 ± 0.51. There was no difference between men and women. There is a positive correlation between GI and QHI. The survey shows that the prevalence of unclean gingivitis in young children is closely related to their oral hygiene status.