Abstract
There are several types of primary and secondary stability measuring methods, but there are no calculating methods to determine direct primary stability. The aim of this work is to make a calculation method for primary stability. The out coming result of the calculation should be the same form and unit as available in the clinical and used RFA (Resonance Frequency Analysis) method, especially the ISQ (Implant Stability Quotient). Dental implant analog screws were inserted in bone modelling standard PUR (Polyurethane) solid foam blocks, and the insertion torque and the micromotion was monitored. The ISQ values of the inserted screws were measured also. On the basis of results, the characteristic equation was determined, which showed an excellent correlation (r = 0.96) between the micro mobility and ISQ. To simulate the micro mobility of an inserted screw with FEA (Finite Element Analysis) in any case of the change the bone material properties is not difficult instead of in vitro and in vivo examinations. Using the simulation results and the characteristic equation the clinically used ISQ value could be determinable. Thanks to this simple method, it is easy to monitor virtually the stability change in any lesion of bone structure. As a result of the conducted measurements and simulations, it can be concluded that the ISQ value, which represent the implant primary stability, can be calculated via FEA. With this simulation method, it is possible to predict and monitor pre-clinically the primary stability of dental implants with new geometries.
Highlights
There are different methods to measure an implant primary and secondary stability
The aim of the research was to prove the fact, that finite element analysis (FEA) can be used to determine Implant Stability Quotient (ISQ) stability of the bone screw implant, and the calculated values correlated to the real stability values, which was measured by clinically used machines
The microscopy analysis of the grinded surfaces (Fig. 4) shows the solid foam cells deformation, the compressed area and the material continuity around the dental implant depending of the foam densities
Summary
There are different methods to measure an implant primary and secondary stability These methods can be grouped according their measuring methods type (Fig. 1) [1-7]. There are some type of measuring methods (marked on Fig. 1 with *) which can perform according standards, but these standards are not direct for dental implants, but for metal medical bone screws (e.g. ASTM F543-17, ISO/TS 22911:2016 [8, 9]). Some types of these methods do not allow to measure primary and secondary stability as well, or to monitor the stability change during the healing period.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call