title: Single-tooth replacement with the Frialit-2 system: a retrospective clinical analysis of 146 implants.
abstract: OBJECTIVE
  This study was intended to provide a report of experience and results with Frialit-2 implants used for single-tooth replacement.
  
  
  METHODS
  Over a 7-year period (1994-2000), 146 single-tooth implants (84 maxilla, 62 mandible) were placed in 112 patients (67 females, 45 males; 31.2 +/- 16.4 years). The sites included maxillary anterior teeth (n = 38) as well as the mandibular premolars and molars (n = 57). Ninety-three crowns were cemented and 53 crowns were screw mounted (22 with vertical, 31 with horizontal screws) on standard abutments. The follow-up time varied between 3 and 80 months (35.8 +/- 16.5 months).
  
  
  RESULTS
  Two implants (1.4%) were lost, 1 during early loading and the other after 6 years. The most frequent prosthetic complication was isolated crown loosening of cemented crowns requiring recementation of 9 crowns (9.9%). Crowns with vertical screws showed no crown and/or screw loosening. Four crowns (2.8%) were replaced because of ceramic fracture.
  
  
  CONCLUSIONS
  Peri-implant soft tissue condition, bone resorption, and Periotest values indicated satisfactory results. The cumulative implant survival rate during the follow-up period was 97.3%, and that of the crowns 96.4% (total cumulative survival rate 93.7%).
  
  
  CONCLUSIONS
  With the low number of abutment screw loosenings (3.5%), the deep internal hexagonal retention compared favorably to external retention methods. The predominant use of long implants (98.4% > or = 13 mm) allowed a favorable implant/crown ratio with the potential for problem-free, long-term results.
authors.affiliation: Dental School University of Vienna, Austria. krennmair@aon.at
authors.forename: Gerald
authors.initials: G
authors.lastname: Krennmair
authors.forename: Stefan
authors.initials: S
authors.lastname: Schmidinger
authors.forename: Othmar
authors.initials: O
authors.lastname: Waldenberger
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D016009:Chi-Square Distribution; D003442:Crowns; D019250:Dental Implants, Single-Tooth; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention / Q000295:instrumentation / Q000379:methods*; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D015993:Life Tables; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D018709:Statistics, Nonparametric