固定义齿基牙牙龈炎 继发龋菌斑因素的研究

Factors associated with fixed partial denture abutment gingivitis and secondary caries

目的通过对固定义齿修复后基牙牙龈炎、继发龋的观察,分析基牙牙龈炎、继发龋与牙周组织及菌斑的关系。方法收集固定义齿修复后出现牙龈炎、继发龋的病例40例,共57颗固定义齿修复体,其中基牙牙龈炎42颗,继发龋15颗。观察基牙的牙周指数、继发龋坏的情况以及菌斑细菌构成比。结果基牙牙龈炎组与继发龋组的牙周指数差异无统计学意义(P>0.05)。基牙继发龋组牙菌斑中球菌的构成比高于基牙牙龈炎组,螺旋体、梭形杆菌和真杆菌的构成比低于基牙牙龈炎组,差异有统计学意义(P<0.05)。结论固定义齿修复后牙周组织的保护同样很重要。固定义齿修复后要对患者进行口腔卫生宣教,指导患者注意保持口腔卫生,定期复诊,以减少牙龈炎、继发龋的发生。

Objective To investigate the factors associated with fixed partial denture abutment gingivitis and secondary caries.Methods Forty patients with gingivitis or secondary caries after fixed partial denture abutment were included in this study,comprising 57 abutment teeth in all（42 with gingivitis and 15 with secondary caries）.The peridontal index of abutment tooth,the severity of secondary caries and constituent ratio of dental plaques were investigated and compared between the two conditions.Results Peridontal index was comparable between patients with abutment gingivitis and those with secondary caries（P0.05）.The constituent ratio of Staphylococci in dental plaque was significantly higher in secondary caries than in abutment gingivitis,while the constituent ratios of Spirochaetes,Fusobocterium and Eubacterium was lower in secondary caries than in abutment gingivitis（P0.05）.Conclusion It is as equally important to protect abutment peridontal tissue after treatment.Patients should be educated to keep good oral cavity hygiene and regular clinic visit in order to reduce gingivitis and secondary caries.