Objective To investigate the efficacy of conical beam computerized tomography(CBCT)parameters in predicting the early stability of implants before and after dental implant surgery.Methods A total of 126 patients with single tooth defect treated from June 2020 to June 2022 were selected,all of which were intended to undergo dental implant surgery.CBCT was used to measure the bone mineral density(BMD)and cortical thickness of the defect area before surgery,and the alveolar bone width was measured by CBCT immediately after surgery.Implant stability quotient(ISQ)value was measured by Ostell ISQ measuring instrument immediately and at 12 weeks after surgery.According to the ISQ value at 12 weeks after sur-gery,they were divided into stable group(ISQ value≥70,n=102)and unstable group(ISQ value＜70,n=24).Basic data and CBCT parameters as well as ISQ values immediately after surgery and at 12 weeks after surgery were compared be-tween the two groups.Pearson correlation coefficient was used to analyze the correlation between CBCT parameters and ISQ,and receiver operating characteristics(ROC)curve was used to analyze the predictive value of CBCT parameters for stability.Results The location and implant diameter of the defect area were significantly different between the stable group and the un-stable group(P＜0.05).BMD,cortical thickness,ISQ immediately after surgery and at 12 weeks after surgery in the defect area in the unstable group were lower than those in the stable group(P＜0.05).Preoperative BMD and bone cortical thick-ness in patients with mandibular anterior tooth defect were the largest,followed by patients with mandibular posterior tooth de-fect patients,patients with maxillary anterior tooth defect and patients with maxillary posterior tooth defect(P＜0.05).The preoperative BMD and cortical thickness of defect area in patients with implant diameter of 4.8 and 4.1 mm were higher than those in patients with implant diameter of 3.3 mm(P＜0.05).The ISQ value in patients with mandibular posterior teeth was the largest,followed by patients with mandibular anterior teeth defect,patients with maxillary posterior teeth defect and pa-tients with maxillary anterior teeth defect immediately after surgery and at 12 weeks after surgery(P＜0.05).The ISQ values immediately after surgery and at 12 weeks after surgery in patients with implant diameter of 4.8 and 4.1 mm were higher than those in patients with implant diameter of 3.3 mm(P＜0.05).BMD and cortical thickness of the defect area were positively correlated with ISQ values immediately after surgery and at 12 weeks after surgery(P＜0.01),while alveolar bone width im-mediately after surgery was not significantly correlated with ISQ values immediately after surgery and at 12 weeks after surgery(P＞0.05).ROC curve analysis showed that the area under the ROC curve(AUC)of BMD and cortical thickness of the de-fected area before surgery to predict stability at 12 weeks after surgery were 0.711(95%CI:0.624,0.788)and 0.759(95%CI:0.674,0.830),sensitivity was53.92%and74.51%respectively,and specificity was87.75%and70.83%re-spectively.Conclusion CBCT measurement of BMD and cortical thickness of the defect area before surgery is closely related to the early stability of the implant,and has good efficacy in predicting the early stability of the implant.Immediately after sur-gery,the alveolar bone width has no significant correlation with the early stability of the implant,and can not effectively pre-dict the early stability of the implant.
关键词
牙缺损/锥形束计算机体层摄影术/牙种植体,单牙/稳定性/骨密度/骨皮质厚度/ROC曲线/曲线下面积
Key words
Tooth defect/Cone-beam computed tomography/Dental implants,single-tooth/Stability/Bone density/Cortical thickness/ROC curve/Area under the curve
维普
万方数据