ABSTRACT
In order to evaluate the effect of countersinking on dental implants primary stability installed in low density bones, thirty dental implants were installed in the most proximal region of oxen ribs and grouped as follow: Group1: Fifteen implants installed by standard drilling with countersinking, Group2: Fifteen implants installed by standard drilling without countersinking. The graduated manual torque wrench and wireless resonance frequency analyzer were used to record the peak insertion torque [IT] and implant stability quotient [ISQ] values respectively. The results revealed a significant difference in IT and ISQ values between the two groups of study with higher values recorded in group two. From these findings and with the limitation of this study, it was concluded that in low density bones, the avoidance of countersinking during implant bed preparation will significantly increases implant primary stability