title: Effect of static magnetic fields on the osseointegration of immediately placed implants:  a randomized controlled clinical trial.
abstract: OBJECTIVE
  The aim of this study was to evaluate the effects of static magnetic fields (SMFs) on the implants immediately placed in fresh extraction sockets.
  
  
  METHODS
  Twenty patients who were in need of 20 fixed implant-supported single crowns in the anterior maxilla were included. After tooth extraction, screw-type implants were placed immediately into fresh extraction sockets and were randomly covered with either magnetic abutment (test group) or conventional healing abutment (control group). Radio frequency analysis (RFA) was conducted at implant placement and after 1, 2, and 3 months. Marginal bone level changes were recorded 1, 2, and 3 months postoperatively.
  
  
  RESULTS
  The RFA measurements showed a significant higher stability for implants in test group than that of control group after 1 month (P = 0.04). At month 2, less crestal bone loss was found in the test group (P = 0.03). However, at month 3, there was no significant difference between the groups for both parameters (P > 0.05).
  
  
  CONCLUSIONS
  SMFs caused more noticeable increase in implant stability and less bone loss during the initial weeks of healing.
authors.affiliation: Dental Implant Research Center and Department of Prosthodontics and Implant, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Hakimeh
authors.initials: H
authors.lastname: Siadat
authors.forename: Seyed H
authors.initials: SH
authors.lastname: Bassir
authors.forename: Marzieh
authors.initials: M
authors.lastname: Alikhasi
authors.forename: Yadollah S
authors.initials: YS
authors.lastname: Shayesteh
authors.forename: Arash
authors.initials: A
authors.lastname: Khojasteh
authors.forename: Abbas
authors.initials: A
authors.lastname: Monzavi
mesh_terms: D000328:Adult; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging; D000539:Alveolar Process / Q000000981:diagnostic imaging; D016025:Bone Transplantation; D003481:Cuspid / Q000601:surgery; D059605:Dental Implant-Abutment Design; D003758:Dental Implantation, Endosseous / Q000379:methods*; D019250:Dental Implants, Single-Tooth; D019094:Dental Prosthesis, Implant-Supported; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D057893:Immediate Dental Implant Loading; D007180:Incisor / Q000601:surgery; D060526:Magnetic Fields; D059346:Magnets; D008297:Male; D008437:Maxilla / Q000601:surgery; D008875:Middle Aged; D016348:Osseointegration / Q000502:physiology*; D019252:Radiography, Dental, Digital; D014081:Tooth Extraction; D020390:Tooth Socket / Q000601:surgery; D055815:Young Adult