目的观察窝沟封闭技术（Pit and fissure sealant）对治疗六龄齿龋坏的疗效,并分析影响窝沟封闭术治疗效果的因素。方法选取104例患者,均为6~7岁的儿童,对右侧第一恒磨牙共计224颗进行窝沟封闭处理,即实验组;以涂抹窝沟封闭剂牙齿的对...目的观察窝沟封闭技术（Pit and fissure sealant）对治疗六龄齿龋坏的疗效,并分析影响窝沟封闭术治疗效果的因素。方法选取104例患者,均为6~7岁的儿童,对右侧第一恒磨牙共计224颗进行窝沟封闭处理,即实验组;以涂抹窝沟封闭剂牙齿的对侧牙齿作为空白对照组,定期进行复查和随访,观察窝沟封闭剂的保留情况,并分析两组牙齿的龋齿现象。结果在3年观察期内,涂抹了窝沟封闭剂的实验组牙齿龋齿率明显低于未采取措施的对照组牙齿,两组的比较差异十分明显,具有统计学意义,P〈0.01。结论对适龄儿童的牙齿进行窝沟封闭技术处理对于防止儿童龋齿具有十分明显的作用,应积极普及和推广。展开更多
Objective To study the adherence activity of six representative periodontopathic and cariogenic bacteria to hydroxyapatite disks. Methods Six periodontopathic and cariogenic bacteria of P. gingivalis, A. actinomycetem...Objective To study the adherence activity of six representative periodontopathic and cariogenic bacteria to hydroxyapatite disks. Methods Six periodontopathic and cariogenic bacteria of P. gingivalis, A. actinomycetemcomitans, F. nucleatum, S. sanguis, A. viscosus and S. mutans were cultured in modified MD-300 chemostat according to total fifteen experimental groups of single-specie and each pair of periodontal pathogens and cariogenic bacteria, respectively. After 1h attached live bacteria on removable hydroxyapatite disks was analyzed by culture technologies to evaluate the adherence level. Results The adherence activity of periodontopathic and cariogenic bacteria to HA was in the following order: S. sanguis > A. viscosus> S. mutans> A. actinomycetemcomitans > F. nucleatum > P. gingivalis. The number of periodontopathic bacteria to HA was enhanced by S. sanguis and A. viscosus,respectively.When mix-cultivated with S. mutans, the colonization of P. gingivalis was reduced significantly(P<0.001). Periodontopathic bacteria had no effect on the adherence activity of S. mutans and A. viscosus, except S. sanguis. Conclusion It was showed that the adherence activity of periodontal pathogens was weaker than that of cariogenic bacteria and emphasized the importance of bacterial adherence in determining the level of bacterial colonization on tooth surfaces. It was suggested that periodontopathic bacteria can utilize initial colonizers to become those predominant bacteria in periodontal ecosystem, which maybe have close relation to the periodontopathic mechanism.展开更多
文摘目的观察窝沟封闭技术（Pit and fissure sealant）对治疗六龄齿龋坏的疗效,并分析影响窝沟封闭术治疗效果的因素。方法选取104例患者,均为6~7岁的儿童,对右侧第一恒磨牙共计224颗进行窝沟封闭处理,即实验组;以涂抹窝沟封闭剂牙齿的对侧牙齿作为空白对照组,定期进行复查和随访,观察窝沟封闭剂的保留情况,并分析两组牙齿的龋齿现象。结果在3年观察期内,涂抹了窝沟封闭剂的实验组牙齿龋齿率明显低于未采取措施的对照组牙齿,两组的比较差异十分明显,具有统计学意义,P〈0.01。结论对适龄儿童的牙齿进行窝沟封闭技术处理对于防止儿童龋齿具有十分明显的作用,应积极普及和推广。
文摘Objective To study the adherence activity of six representative periodontopathic and cariogenic bacteria to hydroxyapatite disks. Methods Six periodontopathic and cariogenic bacteria of P. gingivalis, A. actinomycetemcomitans, F. nucleatum, S. sanguis, A. viscosus and S. mutans were cultured in modified MD-300 chemostat according to total fifteen experimental groups of single-specie and each pair of periodontal pathogens and cariogenic bacteria, respectively. After 1h attached live bacteria on removable hydroxyapatite disks was analyzed by culture technologies to evaluate the adherence level. Results The adherence activity of periodontopathic and cariogenic bacteria to HA was in the following order: S. sanguis > A. viscosus> S. mutans> A. actinomycetemcomitans > F. nucleatum > P. gingivalis. The number of periodontopathic bacteria to HA was enhanced by S. sanguis and A. viscosus,respectively.When mix-cultivated with S. mutans, the colonization of P. gingivalis was reduced significantly(P<0.001). Periodontopathic bacteria had no effect on the adherence activity of S. mutans and A. viscosus, except S. sanguis. Conclusion It was showed that the adherence activity of periodontal pathogens was weaker than that of cariogenic bacteria and emphasized the importance of bacterial adherence in determining the level of bacterial colonization on tooth surfaces. It was suggested that periodontopathic bacteria can utilize initial colonizers to become those predominant bacteria in periodontal ecosystem, which maybe have close relation to the periodontopathic mechanism.
