Chaput氏将牙周病分为Ⅲ类: ——慢性牙周炎,为最常见的一型, ——慢性牙周病。——急性青年性牙周炎, 目前,后两类之病因尚来完全明了。而慢性牙周炎之局部原因可分为: 一、决定性因素:0大多数学者认为“牙菌斑”是牙龈炎症的第一个关键性特征,牙菌斑系由口腔内腐败微生物所构成,首先组成外壳,继之集成线状,然后呈螺旋形。约在第7—8天时融合成化学细菌斑。其毒性与 Chaput classifies periodontitis into three categories: - Chronic periodontitis, the most common type, - Chronic periodontal disease. - Acute youth periodontitis, at present, the cause of the latter two types are still fully understood. The local causes of chronic periodontitis can be divided into: First, the decisive factor: 0 Most scholars believe that “plaque” is the first key feature of gingival inflammation, dental plaque by oral microorganisms in the form of corruption, the first composition Shell, followed by integrated linear, and then spiral. Around the 7th-8th day when it merged into a chemical plaque. Its toxicity and