Distribution of pathogens and risk factors of bacterial infections around dental implants / 中国基层医药

ABSTRACT

Objective@#To investigate the distribution of pathogenic bacteria and the risk factors of bacterial infections around dental implants.@*Methods@#From January 2017 to December 2018, 427 patients with oral implantation in Xixi Hospital were selected inthe study.According to the occurrence of bacterial infections around oral implants, the patients were divided into infection group(46 patients) and the non-infection group(381 patients). Pathogenic bacteria were isolated and identified from the bottom of gingival sulcus of infected patients.The risk factors of bacterial infection around dental implants were analyzed by multivariate logistic regression analysis.@*Results@#A total of 59 pathogenic bacteria were isolated from 46 patients with bacterial infection around dental implants, including 38 anaerobic bacteria, 17 aerobic bacteria and 4 beneficial bacteria.Univariate analysis showed that there were no statistically significant differences in sex, age, BMI and hypertension between the two groups (χ2=0.003, 3.393, 0.744, 0.200, all P>0.05). The infection group complicated with diabetes mellitus (19.57%), chronic periodontitis (30.43%), smoking (58.70%), drinking (69.57%), periimplantal alveolar bone defects (50.00%) and overloading (30.43%) were higher than those without infection (5.77%, 6.82%, 29.40%, 34.91%, 23.12%, 11.29%), there werestatistically significant differences (χ2=9.636, 24.241, 16.048, 20.793, 16.655, 13.011, all P<0.05). The results of logistic regression analysis showed that diabetes mellitus, history of chronic periodontitis, smoking, alcohol consumption, poor alveolar bone around implants and overloading were risk factors for bacterial infection around implants.@*Conclusion@#Anaerobic bacteria are the main pathogens of bacterial infection around dental implants.Infection is affected by many factors, including diabetes mellitus, history of chronic periodontitis, smoking, alcohol consumption, poor alveolar bone around implants and excessive load.