Survival and complications: A 9‐ to 15‐year retrospective follow‐up of dental implant therapy

• Published in: Journal of oral rehabilitation Vol. 47; no. 1; pp. 67 - 77
• Main Authors: Adler, Lottie, Buhlin, Kåre, Jansson, Leif
• Format: Journal Article
• Language: English
• Published: England Wiley Subscription Services, Inc 01.01.2020
• Subjects: biological complications; dental implant; Dental Implants; Dental Prosthesis, Implant-Supported; Dental prosthetics; Dental Restoration Failure; Follow-Up Studies; Humans; implant loss; long‐term; mechanical complication; multilevel analyses; Patients; Periodontitis; Retrospective Studies; Smoking; Surgery; Survival; Sweden; technical complication; Transplants & implants; Sweden; biological complications; mechanical complication; multilevel analyses; technical complication; dental implant; implant loss; long-term
• ISSN: 0305-182X; 1365-2842; 1365-2842
• DOI: 10.1111/joor.12866

Long‐term follow‐up of oral implant therapy seldom report all biological and technical complications. The objective of this study was to evaluate the long‐term (9‐15 years) outcome after dental implant therapy, assess survival and complication rates. In addition, to identify the risk indicators of these complications at patient and implant levels. Patients (n = 376) treated with dental implants (n = 1095) between 1999 and 2005 at a specialist clinic in Stockholm, Sweden, were included. Longitudinal data were collected retrospectively from digital dental records. A subset of the included patient underwent a clinical examination at the 9‐15 years follow‐up (n = 163). Chi‐square tests, Kaplan‐Meier analyses and the general estimating equations (GEE) procedure were adopted for multilevel analyses. The cumulative implant survival rate up to 15 years was 82.6% (SE 4.1%). The prevalences of biological and technical complications at patient level were 52% and 32%, respectively. In total, 763 complications occurred, 65% of patients experienced at least one complications. Implant loss occurred significantly more frequently in subjects with a history of treated severe periodontitis Stage III‐IV (P = .008) and in cases when complications were registered during implant surgery (P = .010). Smoking was a significant risk indicator for peri‐implantitis (P = .006). The long‐term implant survival and complication rates at patient level were 83% and 79%, respectively. Implant loss was significantly more frequent for subjects with a history of treated severe periodontitis and if complication was registered during implant surgery. Smoking was a significant risk indicator for peri‐implantitis.