title: Relationship between cortical bone thickness or computerized tomography-derived bone density values and implant stability.
abstract: OBJECTIVE
  To explore the relationship between primary implant stability and different parameters related to implant or bone properties.
  
  
  METHODS
  Twenty-four patients received a total of 136 Straumann SLActive implants. Resonance frequency analysis (RFA) was performed at implant placement, and RFA and Periotest (PTV) were scored at loading. Bone density [Hounsfield (HU) scores] and coronal cortical thickness at osteotomy sites were measured from pre-operative computerized tomography scans.
  
  
  RESULTS
  Implant length, diameter or the presence of bony dehiscence did not have a significant effect on the mean RFA scores at implant insertion. Significant linear relations were found between RFA or PTV scores and HU values (P<0.05), or cortical bone thickness (P<0.05), both at insertion as well as at loading.
  
  
  CONCLUSIONS
  RFA and PTV scores can be predicted based on implant and especially bone related factors.
authors.affiliation: Department of Periodontology, Catholic University Leuven, Belgium. joe.merheb@med.kuleuven.be
authors.forename: Joe
authors.initials: J
authors.lastname: Merheb
authors.forename: Nele
authors.initials: N
authors.lastname: Van Assche
authors.forename: Wim
authors.initials: W
authors.lastname: Coucke
authors.forename: Reinhilde
authors.initials: R
authors.lastname: Jacobs
authors.forename: Ignace
authors.initials: I
authors.lastname: Naert
authors.forename: Marc
authors.initials: M
authors.lastname: Quirynen
mesh_terms: D015519:Bone Density; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D005260:Female; D006801:Humans; D007568:Jaw / Q000000981:diagnostic imaging* / Q000502:physiology; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D016348:Osseointegration; D013529:Surgical Wound Dehiscence; D014057:Tomography, X-Ray Computed; D014159:Transducers; D014465:Ultrasonics; D014732:Vibration
chemical_list: D015921:Dental Implants