title: Five-year success rate of 831 consecutively placed Zirconia dental implants in humans: a comparison of three different rough surfaces.
abstract: OBJECTIVE
  The aim of this study was to evaluate the 5-year success rate of zirconia (ZrO2) implants with three different kinds of surfaces.
  
  
  METHODS
  One-piece zirconia dental implants (CeraRoot) with three different roughened surfaces were designed and manufactured for this study: coated, uncoated, and acid-etched. Five different implant designs were manufactured. Standard or flapless surgical procedures were used for implant placement. Simultaneous bone augmentation or sinus elevation was performed when bone height or width was insufficient. Definitive all-ceramic restorations were placed 4 months after implant placement (8 months or more for implants when bone augmentation or sinus elevation was performed). The implants were followed up to 5 years (mean, 3.40 +/- 0.21).
  
  
  RESULTS
  In all, 831 implants were placed in 378 patients with a mean age of 48 years. The overall implant success rate after 5 years of follow-up was 95% (92.77% for uncoated implants, 93.57% for coated implants, and 97.60% for acid-etched implants). The success rate of the acid-etched surface group was significantly better than that of the other two.
  
  
  CONCLUSIONS
  From this midterm investigation, it can be concluded that zirconia dental implants with roughened surfaces might be a viable alternative for tooth replacement. Further follow-up is needed to evaluate the long-term success rates of the implant surfaces studied.
authors.affiliation: University of Barcelona, Spain. pepeoliva@clinicaoliva.com
authors.forename: Josep
authors.initials: J
authors.lastname: Oliva
authors.forename: Xavi
authors.initials: X
authors.lastname: Oliva
authors.forename: Josep D
authors.initials: JD
authors.lastname: Oliva
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000540:Alveolar Ridge Augmentation / Q000379:methods; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D015607:Stents; D013499:Surface Properties; D016019:Survival Analysis; D019415:Torque; D016896:Treatment Outcome; D014945:Wound Healing / Q000502:physiology; D055815:Young Adult; D015040:Zirconium / Q000737:chemistry*
chemical_list: D020099:Coated Materials, Biocompatible; D015921:Dental Implants; D003764:Dental Materials; D003776:Dental Porcelain; D015040:Zirconium; C028541:zirconium oxide