Abstract
To evaluate the direction dependence of osstell's transducer during the assessment of dental implant stability by wireless resonance frequency analyzer. Materials and Methods: Thirty tapered-SLA dental implants (Super line®) were installed in ten ribs of freshly slaughtered oxen of 2 - 2.5 years old. Three implants were installed in each rib using the fit-sized drilling protocol without countersinking. The stability was assessed by wireless resonance frequency analyzer and five records were taken for each implant by holding the Osstell's tip in different directions in respect to the long axis of the "smart peg". These directions were: (S=superior) parallel to long axis of the " smart peg" and superior to it. (A=anterior) perpendicular to long axis of the " smart peg" and anterior to it. (P=posterior) perpendicular to long axis of the " smart peg" and posterior to it. (M=mesial) perpendicular to long axis of the " smart peg" and mesial to it. (D=distal) perpendicular to long axis of the " smart peg" and distal to it. Results: The implant stability quotient values (ISQ) were almost identical in anterior and posterior directions of Osstell's tip and also closely comparable in mesial and distal directions. Although the ISQ values that recorded in superior directions were slightly higher than in other directions, no significant difference was found among the different directions of probe orientation (ANOVA P> 0.05). Conclusion: Any direction of osstell's transducer will be suitable to assess implant primary stability.
