Analysis Of Clinical Efficacy And Influencing Factors Of Marginal Bone Resorption In Patients With Chronic Periodontitis 5 Years After Implantation

Objective: The aim of this study was to analyze the influencing factors of bone resorption in the posterior region of implants in patients with chronic periodontitis.Methods: 272 patients(629 implants)from the Oral Implantology Center of Affiliated Dental Hospital of China Medical University from January 2010 to December 2014,including 130 patients(308 implants)with chronic periodontitis and periodontal health 142 patients(321 implants).After 5 years of superstructure repair,the implant depth,gingival index,plaque index,marginal bone resorption,and incidence of peri-implantitis were compared between implants in patients with chronic periodontitis and periodontal healthy patients.The inflammation group performed univariate and Logistic multivariate regression analysis on patient-related factors,implant-related factors,implant superstructure repair,and periodontal-related factors.Results: After 5 years of superstructure repair,the exploration depth,gum index,and plaque index of the periodontitis group were higher than those of the periodontal healthy group,but there was no significant difference between the two groups(P>0.05).The marginal bone resorption of the two groups of implants was(0.76±0.58)mm and(0.52±0.32)mm,respectively,and the differences between the two groups were statistically significant(P<0.05).In the periodontitis group,7 implants had peri-implantitis(2.3%),and in the periodontal health group,1 implant had peri-implantitis(0.3%).There was a statistical difference in the incidence of peri-implantitis between the two groups.Significance(P<0.05).There were no significant differences in age,gender,wear,bone density,implant length,one-stage implant surgery,implant system,implant superstructure repair,gingival attachment,depth of exploration,and gingival index(P>0.05).Periodontitis severity,implant diameter,poor oral hygiene,and smoking are factors that affect bone resorption at the implant's margins in patients with periodontitis(P<0.05);Logistic regression analysis shows that implant diameter,poor oral hygiene,and smoking It is an independent risk factor that affects bone resorption of implant margin in patients with periodontitis(P<0.05).Conclusions: Compared with periodontal healthy patients,patients with chronic periodontitis had no differences in implant depth,gingival index,and plaque index 5years after implantation,but marginal bone resorption increased significantly and the incidence of peri-implantitis increased.Implant diameter,poor oral hygiene,and smoking are independent risk factors for bone resorption at the margins of implants in patients with periodontitis,and clinical control of all influencing factors needs to be strengthened.