title: Associations of Resonance Frequency Analysis with Dynamic Mechanical Analysis of Dental Implant Systems.
abstract: BACKGROUND
  Resonance frequency analysis (RFA) has been introduced as a noninvasive method to clinically estimate the stability of dental implant systems.
  
  
  OBJECTIVE
  The objective of this study was to examine whether implant stability quotient (ISQ) values of RFA can account for mechanical stability of the dental implant system, which is assessed using dynamic mechanical analysis (DMA).
  
  
  METHODS
  Fifty-seven screw-type titanium dental implants were placed in artificial polyurethane foams with seven different thicknesses (3.5 to 12 mm) and eight edentulous mandibles of human cadavers (four men and four women, 79.11 ± 13.48 years). After the ISQ values, insertion torque, and static stiffness of each implant system were measured, the DMA was performed to assess dynamic stiffness and viscoelastic tan δ.
  
  
  RESULTS
  The ISQ value had strong positive correlations with thickness, insertion torque, static and dynamic stiffness, and a negative correlation with tan δ of implant systems in artificial bone blocks (r = 0.769 to 0.992, p < .043). However, the ISQ value was correlated with only the insertion torque of implant systems in human mandibles (p < .049).
  
  
  CONCLUSIONS
  The ISQ values could reflect mechanical stability of the dental implant system under the controlled condition of homogeneous density in simple dimensions.
authors: Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH, USA.
authors: Do-Gyoon
authors: DG
authors: Kim
authors: Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH, USA.
authors: Hyun-Jung
authors: HJ
authors: Kwon
authors: Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH, USA.
authors: Yong-Hoon
authors: YH
authors: Jeong
authors: Division of Periodontology, College of Dentistry, The Ohio State University, Columbus, OH, USA.
authors: Hua-Hong
authors: HH
authors: Chien
authors: Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH, USA.
authors: Samantha
authors: S
authors: Crance
authors: Division of Anatomy, College of Medicine, The Ohio State University, Columbus, OH, USA.
authors: Amanda M
authors: AM
authors: Agnew
authors: Dental Research, Zimmer Dental Inc., Carlsbad, CA, USA.
authors: Suneel
authors: S
authors: Battula
authors: Dental Research, Zimmer Dental Inc., Carlsbad, CA, USA.
authors: Jin Whan
authors: JW
authors: Lee
authors: Dental Research and Clinical Affairs, Zimmer Dental Inc., Carlsbad, CA, USA.
authors: Hai Bo
authors: HB
authors: Wen
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015519:Bone Density; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D017268:Dental Prosthesis Retention; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D000074269:Resonance Frequency Analysis; D019415:Torque; D014732:Vibration
chemical_list: D015921:Dental Implants
keywords: dental implant system; dynamic mechanical analysis; implant stability quotient; insertion torque; resonance frequency analysis