Relationship Between Insertion Torque and Resonance Frequency Measurements, Performed by Resonance Frequency Analysis, in Micromobility of Dental Implants: An In Vitro Study.
OBJECTIVE
To evaluate the micromobility of dental implants under occlusal loading in relation to stability measurements of resonance frequency analysis and insertion torque.


METHODS
The sample comprised of 24 implants inserted in 12 fresh cow ribs. Insertion torque and Osstell implant stability quotient (ISQ) measurements were recorded. An "ad hoc" acrylic premolar was made on a temporary abutment and screwed to each implant, and a force of 100 N was subsequently applied at an angle of 6 degrees. Implant micromotion was measured using a Questar microscope with a resolution of 2 μm and an image analysis program.


RESULTS
Data show a statistically significant inverse correlation between the ISQ values and implant micromotion under a load of 100 N (R = 0.86, P < 0.0001). The same relationship is found between insertion torque and implant micromotion, although the relationship is linear up to 34 N·cm and becomes exponential for higher values (R = 0.78, P < 0.0001). A direct correlation is established between insertion torque and ISQ values.


CONCLUSIONS
There is an inverse relationship between both ISQ and insertion torque values and implant micromotion under a load of 100 N.
*Professor, Department of Stomatology I, School of Medicine and Dentistry, University of the Basque Country, Leioa, Spain. †Chairman, Department of Prosthodontics and Occlusion, School of Dentistry, University of Oviedo, Oviedo, Spain. ‡Chairman, Department of Materials Science and Metallurgical Engineering, Polytechnical University of Catalonia, Barcelona, Spain. §Professor of Periodontology and Implants, Department of Dentistry, University of Seville, Seville, Spain. ¶Graduate student, Biomedical Research Department of Physiology and Cellular Biology, School of Medicine and Dentistry, University of the Basque Country, Leioa, Spain. ‖Graduate student, Engineering Physics Department of Nuclear Engineering and Fluid Mechanics, Engineering School, University of the Basque Country, Bilbao, Spain. #Graduate student, Master of Oral Implantologist, Department of Stomatology I, University of the Basque Country, Leioa, Spain.
Aritza
A
Brizuela-Velasco
Ángel
Á
Álvarez-Arenal
Francisco Javier
FJ
Gil-Mur
Mariano
M
Herrero-Climent
David
D
Chávarri-Prado
Yelko
Y
Chento-Valiente
Markel
M
Dieguez-Pereira
D000818:Animals; D002417:Cattle; D059605:Dental Implant-Abutment Design / Q000379:methods / Q000592:standards; D003758:Dental Implantation, Endosseous / Q000379:methods / Q000592:standards; D015921:Dental Implants / Q000592:standards*; D003799:Dental Stress Analysis; D066298:In Vitro Techniques; D008280:Magnetics; D019415:Torque; D014732:Vibration
D015921:Dental Implants