Surgical implantation effects on the primary stability of implant in the elderly of minimally Invasive dental implant surgery

LI Hong-shi; LIU Hong-chen

Abstract：Objective:To evaluate the primary stability of the implants so as to assess values of the torque and resonance frequency analysis (RFA) of implants by different surgical procedures in the elderly of minimally Invasive dental implant surgery.Methods:87 Implants were placed in 63 elderly patients of missing teeth in maxillary premolar areas and were randomly divided into traditional implanting group, differential backup group and bone extrusion hole group, detected immediately torque values and implant stability quotient (ISQ) value, and deal with ISQ values of each group after implanting surgery in time point of 1,2,4,6,8,12 W. Compared with values of torque value and ISQ statistically between the groups by Using one-way ANOVA and LSD-t test. Results: Average torque values immediately after implantation in backup group is 33.28±3.95 N·CM, significantly higher than the traditional preparation holes torque value (P<0.05);mean value of ISQ immediate after operative measurements in groups of backup and bone hole extrusion were higher than that of traditional equipment hole group;the ISQ values showed a downward trend and got the minimized value in time point of 4 W after operation , and then the value of ISQ gradual recovered in 12 W after operation in groups of backup and bone hole extrusion, there was no statistical difference of the values of ISQ after the time point of 12W between 3 groups (P>0.05). Conclusion: Surgical technology by means of backup hole and bone extrusion could significantly improve implant primary stability in elderly by means of minimally Invasive dental implant surgery as compared with the traditional hole prepared surgery.