The study investigated bacteria sampled from the mandibular third molar pericoronitis with the hypothesis that the same species also can be detected in several sites of the oral cavity. Subgingival plaque samples were...The study investigated bacteria sampled from the mandibular third molar pericoronitis with the hypothesis that the same species also can be detected in several sites of the oral cavity. Subgingival plaque samples were taken from 41 patients (mean age 23.2 ± 4.2 years), from the third molar pericoronal pocket and from 3 adjacent gingival pockets, from the tongue and saliva. Aggregatibacter actinomycetemcomitans (A.a.), Porphyromonas gingivalis (P.g.), Tan- ne-rella forsythia (T.f.), Prevotella intermedia (P.i.), Pre-votella nigrescens (P.n.), and Treponema denticola (T.d.) were analyzed by qualitative PCR method. All the species analyzed were found in the pericoronitis samples in the following frequency: T.f. 73%, T.d. 68%, P.i. + P.n. 35%, A.a. 5%, and P.g. 5%. Saliva and tongue samples were also highly positive with T.f. (both 76%) and T.d. (saliva 57%, tongue 76%) and better sources for A.a. (saliva 8%, tongue 14%), and P.g. (saliva 14%, tongue 8%) than the pericoronitis pocket. The gingival pocket samples were less frequently positive the further the site in question was from the pericoronitis site. Contrary to earlier observations T.f. was frequently defected in pericoronitis sites. The results emphasize the importance of pericoronitis as a focus of infection.展开更多
目的:探讨下颌第三磨牙(mandibular third molar,M3M)的位置与急性冠周炎发生的关系。方法:选择289例诊断为M3M急性冠周炎的患者为研究对象,对患者性别、年龄,M3M的阻生类型、萌出高度、牙冠周围软组织覆盖面积、盲袋深度及有无对颌牙...目的:探讨下颌第三磨牙(mandibular third molar,M3M)的位置与急性冠周炎发生的关系。方法:选择289例诊断为M3M急性冠周炎的患者为研究对象,对患者性别、年龄,M3M的阻生类型、萌出高度、牙冠周围软组织覆盖面积、盲袋深度及有无对颌牙的咬合创伤进行记录,并对数据进行统计学分析。结果:发生冠周炎的M3M以垂直阻生最多见(69.9%),不同阻生类型之间,冠周炎发生构成比的差异有统计学意义(P<0.05)。M3M的萌出高度、软组织覆盖面积及盲袋深度与急性冠周炎的发生相关,差异具有统计学意义(P<0.05)。结论:垂直高位阻生、牙冠周围软组织覆盖面积在51%~75%或盲袋深度深是M3M发生急性冠周炎的危险因素,这些类型的M3M建议进行预防性拔除。展开更多
文摘The study investigated bacteria sampled from the mandibular third molar pericoronitis with the hypothesis that the same species also can be detected in several sites of the oral cavity. Subgingival plaque samples were taken from 41 patients (mean age 23.2 ± 4.2 years), from the third molar pericoronal pocket and from 3 adjacent gingival pockets, from the tongue and saliva. Aggregatibacter actinomycetemcomitans (A.a.), Porphyromonas gingivalis (P.g.), Tan- ne-rella forsythia (T.f.), Prevotella intermedia (P.i.), Pre-votella nigrescens (P.n.), and Treponema denticola (T.d.) were analyzed by qualitative PCR method. All the species analyzed were found in the pericoronitis samples in the following frequency: T.f. 73%, T.d. 68%, P.i. + P.n. 35%, A.a. 5%, and P.g. 5%. Saliva and tongue samples were also highly positive with T.f. (both 76%) and T.d. (saliva 57%, tongue 76%) and better sources for A.a. (saliva 8%, tongue 14%), and P.g. (saliva 14%, tongue 8%) than the pericoronitis pocket. The gingival pocket samples were less frequently positive the further the site in question was from the pericoronitis site. Contrary to earlier observations T.f. was frequently defected in pericoronitis sites. The results emphasize the importance of pericoronitis as a focus of infection.
文摘目的:探讨下颌第三磨牙(mandibular third molar,M3M)的位置与急性冠周炎发生的关系。方法:选择289例诊断为M3M急性冠周炎的患者为研究对象,对患者性别、年龄,M3M的阻生类型、萌出高度、牙冠周围软组织覆盖面积、盲袋深度及有无对颌牙的咬合创伤进行记录,并对数据进行统计学分析。结果:发生冠周炎的M3M以垂直阻生最多见(69.9%),不同阻生类型之间,冠周炎发生构成比的差异有统计学意义(P<0.05)。M3M的萌出高度、软组织覆盖面积及盲袋深度与急性冠周炎的发生相关,差异具有统计学意义(P<0.05)。结论:垂直高位阻生、牙冠周围软组织覆盖面积在51%~75%或盲袋深度深是M3M发生急性冠周炎的危险因素,这些类型的M3M建议进行预防性拔除。
