title: Removal Rates of Dental Implants Placed in Conjunction With Autologous Bone and Xenogeneic and Synthetic Alloplastic Materials in Finland Between 1994 and 2012.
abstract: OBJECTIVE
  This study aimed to assess the use of bone augmentation materials in Finland from 1994 to 2012 by assessing removal rates of implants placed in combination with autologous bone, xenogeneic grafts, and synthetic alloplastic materials.
  
  
  METHODS
  The National Institute for Health and Welfare in Finland granted permission to access raw data of the Finnish Dental Implant Register for implant augmentation materials and removal rates of implants placed in augmented sites from April 1994 to April 2012.
  
  
  RESULTS
  A total of 198,538 implants were placed in Finland between 1994 and 2012 in 110,543 operations. A total of 3318 (1.7%) of the placed implants were removed during the observation period. Augmentations were performed on 20,812 (18.8%) operations during 1994-2012. The removal rates of implants placed at sites augmented with autologous bone were 2.31%, xenogeneic materials 0.91%, and synthetic alloplastic materials 2.80%. The removal rate was 1.87% when no augmentation material was used.
  
  
  CONCLUSIONS
  The placement of dental implants in conjunction with bone augmentation materials is predictable with a low complication rate.
authors: *Assistant Professor, Department of Oral and Maxillofacial Surgery and Oral Pathology, University Hospital Vrije Universiteit Amsterdam/ACTA, Amsterdam, The Netherlands. †Specialist in Oral and Maxillofacial Unit, Department of Otorhinolaryngology, Tampere University Hospital, Tampere, Finland. ‡Resident, Department of Oral Radiology, University of Helsinki Institute of Dentistry, Helsinki, Finland. §Professor, Department of Oral and Maxillofacial Surgery, Oulu University Hospital, University of Oulu, Oulu, Finland; BioMediTech, Institute of Biosciences and Medical Technology, University of Tampere, Tampere, Finland. ¶Statistician, School of Health Sciences, University of Tampere, Science Centre, Pirkanmaa Hospital District, Tampere, Finland.
authors: Jan
authors: J
authors: Wolff
authors: Mikko
authors: M
authors: Pyysalo
authors: Anna-Kaisa
authors: AK
authors: Antalainen
authors: George K
authors: GK
authors: Sándor
authors: Mika
authors: M
authors: Helminen
mesh_terms: D000540:Alveolar Ridge Augmentation / Q000009:adverse effects / Q000379:methods / Q000706:statistics & numerical data; D018786:Bone Substitutes / Q000009:adverse effects* / Q000627:therapeutic use; D016025:Bone Transplantation / Q000009:adverse effects* / Q000706:statistics & numerical data; D015921:Dental Implants / Q000009:adverse effects*; D019232:Dental Restoration Failure / Q000706:statistics & numerical data*; D005387:Finland; D006801:Humans; D012042:Registries; D012189:Retrospective Studies
chemical_list: D018786:Bone Substitutes; D015921:Dental Implants