华西口腔医学杂志Issue(1)：71-74,4.DOI:10.7518/hxkq.2014.01.017
老年人桩核冠修复前后龈沟内致龋菌变化的比较研究
Comparative studies on cariogenic bacteria of the root surface before and after post-core crown restoration in aged people
摘要
Abstract
Objective To investigate the changes in the quantity of colonizing Streptococcus mutans(S. mutans) and Acti-nomyces on the root surface plaque before and after post-core crown restoration of the mandibular first molars in the elderly patients. Methods A total of 30 elderly patients, each with one post-core crown restoration of the mandibular first molar, were randomly chosen to participate in the studies. Patients with mandibular first molars with post-core crown restoration and those with healthy contralateral mandibular first molars were divided into the test and control groups, respectively. Root surface plaques of the two groups were collected before tooth preparation, 72 h after preparation, one week after preparation, and one month after restoration. S. mutans, Actinomyces naeslundii (A. naeslundii) and Actinomyces viscosus (A. viscosus), were identified using colony morphology, biochemical techniques, and polymerase chain reaction (PCR). Plaque count was measured using microbial colony count. Results The number of S. mutans and A. viscosus and A. naeslundii in the test group, which was statistically significant (P<0.05), increased 72 h after preparation. The quantities of S. mutans, A. viscosus, and A. naeslundii one week after preparation were significantly different (P<0.05). The plaque count of S. mutans, A. viscosus, and A. naeslundii in the test group decreased one month after restoration (P<0.05). Conclusion The quantities of S. mutans, A. viscosus and A. naeslundii increase one week after preparation but decrease one month after restoration. The finding suggests that dentists should educate patients about plaque control during the early period after tooth preparation.关键词
桩核冠/变异链球菌/放线菌/菌落形成单位Key words
post and core crown/Streptococcus mutans/Actinomycetes/colony-forming units分类
医药卫生引用本文复制引用
吕岩,徐心怡,郭斌,付敏,贾岳,郭小龙,陈媛媛,袁鹤..老年人桩核冠修复前后龈沟内致龋菌变化的比较研究[J].华西口腔医学杂志,2014,(1):71-74,4.基金项目
四川省科技计划基金资助项目（2013SZ0008）；解放军总医院临床扶持基金资助项目 （）
