摘要
口腔酸性环境不利于形成牙石及发生牙周病。为探讨影响口腔酸碱环境的主要因素，本实验研究了１０例牙周健康的成人唾液及牙菌斑细菌对口腔ｐＨ值的影响，结果表明，唾液沉淀物尤其是牙菌斑中常见２９种细菌，通过产生醋酸等有机酸，使ｐＨ值下降，其中尤以内氏等３种放线菌降低ｐＨ值作用最为明显。
As a high pH
favors calculus and periodontal disease formation,the objective of
this study toidentify the bacteria and acids they produce upon
de-amination of amino acids shown earlier to producethe pH fall from
alkalinity even though NH3 is produced at the same time. Suspensions
of 29 purecultures of the more prominent plaque bacteria were
adjusted to pH 9.0, and incubated for 4h at 37℃.At intervals.the pH
was measured and samples removed for analysis of acids.It was evident
thatessentially all plaque bacteria contribute to the pH fall from
alkalinity, but because of actinomycesand their large numbers in
dental plaque, they may be responsible for faster and greater pH
fallin some plapues than in others Acetic acid was the main acid
formed by all microorganisms tested.Aplot of delta pH and total or
acetic acid formed showed a linear relation(r=0.764 or
0.549,p<0.005).
出处
《北京医科大学学报》
CSCD
1994年第2期122-124,共3页
Journal of Peking University(Health Sciences)
关键词
牙周病
牙菌斑
有机酸
Periodontal disease
Dental plaque
Organic
acid
