摘要
Abstract
Objective:To evaluate risk factors that affect the stability of miniscrew used asorthodontic anchorage.Methods:A total of eighty malocclusional patients from August 2012 to February 2015 in our hospital were enrolled (inclusion criteria:malocclu-sional patients without severe heart,brain and lung disease,without severe liver and kidney disfunction,without neural and mental dis-eases,without contraindications for surgery and tooth extraction)and divided into two groups based on whether the minicrews were loos-en,lost,shifted or not:stable group (57 patients with 241 miniscrews)and unstable group (23 patients with 28 miniscrews).Ten po-tential risk factors,including age,gender,length of minicrews,oral hygiene status,inflammation of the peri-implant tissue,sites and an-gle of loading,the time of initial load application,methods and duration of loading,were firstly screened using univariate analysis,and the significant risk factors were further determined by employing multiple logistic regression analysis.Results:5 significant risk factors were found by univariate analysis,which were age,the time of initial load application,the lasting time of loading,oral hygiene status and Inflammation of the peri-implant tissue.Further study with multiple logistic regression analysis indicated that age was positively associat-ed with the stability of minicrews,while the time of initial load application,lasting time of loading,oral hygiene status and Inflammation of the peri-implant tissue were negatively associated with the stability of minicrews.Conclusion:Age,the time of initial load applica-tion,lasting time of loading,oral hygiene status and Inflammation of the peri-implant tissue were risk factors associated with the stability of minicrews.This information will help to optimize the therapeutic strategies and improve the clinical efficacy.关键词
微型种植体/危险因素/稳定性/回归分析Key words
Miniscrew/Risk factors/Stability/Regression analysis分类
医药卫生
