Abstract: Objective： To study the short-term and long-term repair complications of dental implant patients and analyze the risk factors. Methods： From February 2012 to February 2017, 400 patients receiving dental implant treatment in our hospital were recorded as the objects of observation. All patients were divided into the repair complication group(98 cases) and the non repair complication group(302 cases) according to whether there were near and long-term repair complications after implantation. The two groups were compared in the methods of examination before implant surgery, implant length, implant diameter, bone augmentation and other aspects,estoration materials, screw retainer and bonding retainer, bridge or single crown restoration. Multivariate Logistic regression analysis was performed. Results： The proportion of patients in the repair complication group who received panoramic dental examination before implantation surgery was higher than the non repair complication group. Compared with the non repair complication group, the proportion of patients in the repair complication group receiving spiral CT examination before implant surgery was lower(all P<0.05). The implant length<10mm, implant diameter< 3.5mm in the repair complication group, the bone increment surgery was not accepted, the prosthesis materials were all-ceramic crowns, screw retention, and the number of patients with bridge repair were higher than those in the non repair complication group, respectively(all P<0.05). The multi-factor Logistic regression analysis available: spiral CT examination, the length of the implant<10mm, implant diameter< 3.5 mm, not incremental bone surgery treatment were independent risk factors for patients with dental implants short-term and long-term repair complications, short-term, long-term repair complications all porcelain crown, screw retention, bridge repair in patients with protection factor(all P<0.05). Conclusion： Spiral CT examination, implant length<10mm, implant diameter<3.5mm, no incremental bone surgery can increase the risk of short-term, long-term repair complications all porcelain crown, screw retention, bridge repair in patients with dental implants. Relevant intervention measures should be formulated according to the above factors in clinical work, so as to reduce the probability of short-term and long-term repair complications.

Key words: dental implant, short-term and long-term repair complications, implant length, implant diameter, osteoplasty