Acoustic modal analysis can quantify bone screw stability in an in-vivo animal study

Primary and secondary stabilities are two key elements in achieving osseointegration. Conventional techniques such as pull-out test and insertion torque previously have been utilized to evaluate the screw stability [1,2]. However, they have been found to be non-repeatable and unfeasible for clinical applications. To assess the screw stability in an in-vivo testing condition, the aim of this study was to apply acoustic modal analysis and compare the results with the conventional destructive pull-out and conventional non-destructive Periotest tests. Periotest is a well-known modal analysis method in stability assessment of dental implants. To investigate the discernability of methods to slight changes, the tip design of screws was selected as a self-tapped and non-self-tapped types.