title: Resonance frequency analysis of overdenture retainer implants with immediate loading.
abstract: OBJECTIVE
  To evaluate 16 patients of both sexes with lower overdenture and upper complete dentures, by analysing the resonance frequency of the initial and late stability of implants used to retain the overdenture under immediate loading.
  
  
  BACKGROUND
  Oral rehabilitation treatment with complete dentures using implants has been increasingly more common among the specialists in the oral rehabilitation area. This is an alternative for obtaining retention and stability in treatments involving conventional complete dentures, where two implants are enough to retain the overdenture satisfactorily.
  
  
  METHODS
  The Osstell™ Mentor device was used for the analysis in the initial period (primary stability), 3 and 15 months after the installation of the lower overdenture (secondary stability). The statistical analysis was performed with the repeated measures model (p < 0.01).
  
  
  RESULTS
  The implant stability quotients were observed to increase after 15 months of the rehabilitating treatment.
  
  
  CONCLUSIONS
  The use of overdentures over two lower implants should become the treatment of choice for individuals who have a fully edentulous mandible.
authors.affiliation: Department of Morphology, Stomatology and Physiology, Ribeirão Preto Dental School, University of São Paulo, Ribeirão Preto, Brazil.
authors.forename: Ronaldo José
authors.initials: RJ
authors.lastname: da Silva
authors.forename: Marisa
authors.initials: M
authors.lastname: Semprini
authors.forename: Cláudia Helena Lovato
authors.initials: CH
authors.lastname: da Silva
authors.forename: Selma
authors.initials: S
authors.lastname: Siéssere
authors.forename: Daniela Thomazatti
authors.initials: DT
authors.lastname: Chimello
authors.forename: César
authors.initials: C
authors.lastname: Bataglion
authors.forename: Cristiane
authors.initials: C
authors.lastname: Savaris
authors.forename: Simone Cecilio Hallak
authors.initials: SC
authors.lastname: Regalo
mesh_terms: D000328:Adult; D000368:Aged; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003779:Denture Design; D003781:Denture Retention; D003826:Denture, Complete, Lower; D003828:Denture, Overlay; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D057893:Immediate Dental Implant Loading / Q000295:instrumentation / Q000379:methods; D008297:Male; D008875:Middle Aged; D016348:Osseointegration / Q000502:physiology; D014732:Vibration
chemical_list: D015921:Dental Implants