title: Nasal Floor Elevation for Implant Treatment in the Atrophic Premaxilla: A Within-Patient Comparative Study.
abstract: BACKGROUND
  There is a lack of evidence regarding success of implants placed in atrophic premaxilla using the nasal floor elevation technique.
  
  
  OBJECTIVE
  This study aimed to compare implants placed in augmented bone in the anterior maxilla using the nasal floor elevation technique with implants placed in the maxillary sinus region using the sinus lift technique.
  
  
  METHODS
  A within-patient controlled clinical trial was performed on 14 patients receiving 78 implants. The implants were assigned to one of two study groups on the basis of implant location. A total of 37 implants were placed in the nasal fossa region (NF group), and 41 implants were placed in the maxillary sinus region (MS group). Patients were followed up for 4.5 ± 2.2 years, with comparable follow-up times for implants in NF and MS groups (4.7 ± 2.1 and 4.9 ± 2.1 years, respectively; p > .05). Treatment outcomes were assessed and statistically analyzed.
  
  
  RESULTS
  Implant success rate was 89.2% in the NF group and 95.0% in the MS group, with no statistically significant difference between them (p > .05). No nasal or sinus membrane perforation or other complications were reported within the follow-up period. Significant differences were found between the two groups in terms of residual bone height, augmented bone height, and implant diameter.
  
  
  CONCLUSIONS
  Nasal floor elevation is an effective and safe procedure that can be used for implant placement in atrophic premaxilla with success rates that are comparable to those of implants placed in the maxillary sinus.
authors.affiliation: Faculty of Dentistry, Universidad Complutense, Madrid, Spain.|Clinica Dental Alcalá, Madrid, Spain.
authors.forename: Jesus Torres
authors.initials: JT
authors.lastname: Garcia-Denche
authors.affiliation: Division of Restorative Dentistry, Faculty of Dentistry, McGill University, Montreal, QC, Canada.
authors.forename: Abdullah
authors.initials: A
authors.lastname: Abbushi
authors.affiliation: Faculty of Dentistry, Universidad Complutense, Madrid, Spain.
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Hernández
authors.affiliation: Faculty of Dentistry, Universidad Complutense, Madrid, Spain.
authors.forename: Isabel
authors.initials: I
authors.lastname: Fernández-Tresguerres
authors.affiliation: Department of Physical Chemistry II, Faculty of Pharmacy, Universidad Complutense, Madrid, Spain.
authors.forename: Enrique
authors.initials: E
authors.lastname: Lopez-Cabarcos
authors.affiliation: Division of Restorative Dentistry, Faculty of Dentistry, McGill University, Montreal, QC, Canada.
authors.forename: Faleh
authors.initials: F
authors.lastname: Tamimi
mesh_terms: D000368:Aged; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D001284:Atrophy; D003758:Dental Implantation, Endosseous / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla / Q000473:pathology / Q000601:surgery*; D009295:Nasal Bone / Q000473:pathology / Q000601:surgery; D059546:Sinus Floor Augmentation / Q000379:methods*
keywords: implant success rate; nasal floor elevation; nasal lift; premaxilla; sinus lift; within-patient controlled trial