title: A Retrospective Study on Immediate Placement of Neoss Implants with Early Loading of Full-Arch Bridges.
abstract: BACKGROUND
  Full-arch clearances of compromised teeth and placement of implant-supported prostheses is one solution for the prosthetic rehabilitation of partially dentate patients.
  
  
  OBJECTIVE
  To retrospectively evaluate treatment outcomes after full clearance, immediate placement, and early loading of full-arch fixed bridges.
  
  
  METHODS
  Fifty-five patients subjected to full clearance and placement of 284 Neoss implants (Bimodal™ and Proactive™, Neoss Ltd, Harrogate, UK) in 29 edentulous maxillae and 26 mandibles for early loading (1 to 3 days) of a provisional full-arch bridge were retrospectively evaluated after 1 to 6 years of loading. Osstell™ measurements (Osstell AB, Göteborg, Sweden) were taken at placement and after 3 to 9 months when the provisional bridge was replaced with a permanent one. Marginal bone levels were measured in intraoral radiographs.
  
  
  RESULTS
  All patients (100%) wore a fixed bridge at the time of finalizing the study. A total of 18 failures (6.3%) were encountered during the follow-up, giving an overall cumulative survival rate of 93.7%. All failures occurred in the maxilla (10.6%), and no implants were lost in the mandible. More Bimodal™ (9.0%) than Proactive™ (4.1%) implants failed. Failing implants showed a significantly lower mean primary stability than successful ones (p = .015). Failed cases showed a significantly lower average ISQ for all implants (p = .015) and a marked decrease to the second registration, while successful cases showed and maintained high ISQs. The average bone loss after 1 year was 0.8 ± 0.5 mm.
  
  
  CONCLUSIONS
  Full-arch clearance of severely diseased teeth followed by immediate placement of Neoss implants, early loading with provisional full-arch bridges, and subsequent permanent bridges is a possible treatment modality for partially dentate patients. Caution with this approach is recommended for the maxilla, as opposed to the mandible.
authors.affiliation: Private practice, Feltre, Italy.|private practice, Fiera Di Primiero, Italy.
authors.forename: Peter
authors.initials: P
authors.lastname: Andersson
authors.affiliation: Private practice, Feltre, Italy.
authors.forename: Werner
authors.initials: W
authors.lastname: Degasperi
authors.affiliation: private practice, Fiera Di Primiero, Italy.
authors.forename: Damiano
authors.initials: D
authors.lastname: Verrocchi
authors.affiliation: Private practice, Feltre, Italy.|Department of Oral and Maxillofacial Surgery, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden.
authors.forename: Lars
authors.initials: L
authors.lastname: Sennerby
mesh_terms: D000328:Adult; D000368:Aged; D003758:Dental Implantation, Endosseous / Q000379:methods*; D017267:Dental Prosthesis Design / Q000379:methods*; D019094:Dental Prosthesis, Implant-Supported / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies
keywords: dental implants; early loading; edentulous jaws; tooth extraction