title: Retrospective evaluation of the success of oral rehabilitation using the Frialit-2 implant system. Part 1: Influence of topographic and surgical parameters.
abstract: OBJECTIVE
  This retrospective longitudinal study evaluated the success of implant-prosthetic rehabilitation with the Frialit-2 implant system.
  
  
  METHODS
  The study was performed with 504 patients, from two treatment centers, who had received a total of 1,554 implants between May 1990 and May 2001. The data of these patients, who received the implants in various regions and for various indications, were analyzed with respect to clinical, topographic, and radiographic parameters. The mean observation period was 6.2 years, with a maximum of 134 months.
  
  
  RESULTS
  A survival rate of 94.8% was found for all implants. The implant survival rate of 92.6% in the maxilla remained constant after 68 months of observation. In the mandible, the implant survival rate of 96.7% showed no changes after 76 months. Kaplan-Meier analysis identified jaw, occurrence of postoperative complications, and region as statistically significant factors influencing implant survival. Multivariate Cox regression showed that gender, occurrence of postoperative complications, and jaw were factors that increased the risk of implant loss. Statistically significant correlations were found between the incidence of implant loss and vertical bone loss adjacent to the implant at the time of second-stage surgery.
  
  
  CONCLUSIONS
  Implant survival rate is influenced by implant site, gender, and occurrence of complications. On the whole, the Frialit-2 system proved successful in all areas of indication after long-term observation.
authors.affiliation: Department of Oral Surgery and Dental Radiology, Medical Faculty of the Humboldt University, Dental School, Charité, Berlin. frank.strietzel@charite.de
authors.forename: Frank Peter
authors.initials: FP
authors.lastname: Strietzel
authors.forename: Klaus-Peter
authors.initials: KP
authors.lastname: Lange
authors.forename: Melitta
authors.initials: M
authors.lastname: Svegar
authors.forename: Hans-Jürgen
authors.initials: HJ
authors.lastname: Hartmann
authors.forename: Ingeborg
authors.initials: I
authors.lastname: Küchler
mesh_terms: D016301:Alveolar Bone Loss / Q000150:complications; D000540:Alveolar Ridge Augmentation; D003758:Dental Implantation, Endosseous / Q000009:adverse effects; D015921:Dental Implants; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D007575:Jaw, Edentulous / Q000473:pathology; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D012737:Sex Factors; D016019:Survival Analysis
chemical_list: D015921:Dental Implants