Orstavik D, Arneberg P, Valderhaug J
Acta Odontol Scand. 1981;39(5):267-74. doi: 10.3109/00016358109162289.
Test specimens of amalgam, gold, porcelain, heat-cured acrylic resin, and human enamel were made to fit into cavities prepared in acrylic pontics of maxillary bridges. One side of the specimen was in close contact with the mucosa. Plaque was allowed to accumulate on the specimens for 27 to 48 days, and adherent bacteria were then quantified by cultivation on selective and non-selective media. The inflammatory status of the mucosa overlying the specimens were monitored by exudation measurements. Lower total numbers of bacteria were recovered from acrylic specimens than from the other materials used, including enamel. There were also significant subject differences in bacterial recovery. Test specimens in contact with inflamed mucosa yielded less total numbers of bacteria, but higher numbers of Streptococcus mutans, than did specimens exposed to mucosa with no or negligible exudation.
制备汞合金、金、瓷、热固化丙烯酸树脂和人牙釉质的测试标本，使其适配于上颌桥丙烯酸树脂桥体所制备的窝洞中。标本的一侧与黏膜紧密接触。让菌斑在标本上积聚27至48天，然后通过在选择性和非选择性培养基上培养来对黏附细菌进行定量。通过渗出液测量来监测覆盖在标本上的黏膜的炎症状态。从丙烯酸树脂标本中回收的细菌总数低于从包括牙釉质在内的其他所用材料中回收的细菌总数。在细菌回收方面也存在显著的个体差异。与发炎黏膜接触的测试标本产生的细菌总数较少，但变形链球菌的数量高于暴露于无渗出或渗出可忽略不计的黏膜的标本。
