title: Clinical and radiographic evaluation of osseotite-expanded platform implants related to crestal bone loss: a 10-year study.
abstract: OBJECTIVE
  The aim of this prospective clinical study was to evaluate the survival rates at 10 years of expanded platform implants placed in the anterior zone of the maxilla and immediately restored with single crowns.
  
  
  METHODS
  Implants incorporating the platform-switching concept were placed in fresh extraction sockets in the maxillary arch, with each patient receiving a provisional restoration immediately after implant placement. After 15 days, final screwed restorations were inserted. Mesial and distal bone heights were evaluated using digital radiography on the day following implant placement and at 1, 5, 7, and 10 years. Primary stability was measured with resonance frequency analysis (RFA) using the Osstell Mentor device. Eighty-six implants were placed in 32 men and 32 women ranging in age between 29 and 60 (mean, 39.64 ± 5.16 years).
  
  
  RESULTS
  Marginal bone loss from implant collar to bone crest between baseline and 10 years follow-up was 1.01 mm ± 0.22. Mesial site crestal bone loss ranged from 3.57 mm ± 1.1 at baseline to 3.77 mm ± 0.7 at 10-year. Distal site crestal bone loss ranged from 3.49 mm ± 0.8 at baseline to 3.73 mm ± 0.7 at 10 year.
  
  
  CONCLUSIONS
  The platform-switched implants remained stable over the course of 10 years and had an overall survival rate of 97.1%.
authors: Department of Implant Dentistry, School of Medicine and Dentistry, University of Murcia, Murcia, Spain.
authors: José Luis
authors: JL
authors: Calvo-Guirado
authors: Department of Pharmacological Interactions in Dentistry, Dental School, University of Granada, Granada, Spain.
authors: Gerardo
authors: G
authors: Gómez-Moreno
authors: Department of Implant Dentistry, School of Medicine and Dentistry, University of Murcia, Murcia, Spain.
authors: Rafael A
authors: RA
authors: Delgado-Ruiz
authors: Department of Implant Dentistry, School of Medicine and Dentistry, University of Murcia, Murcia, Spain.
authors: José E
authors: JE
authors: Maté Sánchez de Val
authors: Department of Implant Dentistry, School of Medicine and Dentistry, University of Murcia, Murcia, Spain.
authors: Bruno
authors: B
authors: Negri
authors: Department of Implant Dentistry, School of Medicine and Dentistry, University of Murcia, Murcia, Spain.
authors: María P
authors: MP
authors: Ramírez Fernández
mesh_terms: D000328:Adult; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000517:prevention & control*; D003442:Crowns; D003758:Dental Implantation, Endosseous / Q000379:methods*; D019250:Dental Implants, Single-Tooth; D017267:Dental Prosthesis Design; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging / Q000601:surgery; D008875:Middle Aged; D011446:Prospective Studies; D011859:Radiography; D014081:Tooth Extraction; D020390:Tooth Socket / Q000000981:diagnostic imaging / Q000601:surgery; D016896:Treatment Outcome
keywords: dental implants; platform switching; resonance frequency analysis