Sapporo Medical Journal

Abstract : Background: The primary stability of the dental implant is a crucial factor determining the ability to initiate temporary implant-supported prosthesis and for subsequent successful osseointegration, especially in the maxillary posterior site. Aim: To assess the reliability of the insertion torque of dental implants by relating it to the implant stability quotient values measured by the Osstell device. Material and methods: This study included healthy, non-smoker patients with no history of diabetes or other metabolic, or debilitating diseases that may affect bone healing, having non-restorable fractured teeth and retained roots in the maxillary posterior site. Primary dental implant stability was evaluated using a torque ratchet from the dental implant kit and ISQ values generated from the Osstell device. Results: Sixteen male patients with an age range of 20-40 years received sixteen delayed dental implants. The insertion torque value in group (1) Mean (31.88±2.59) N/cm whereas group (2) Mean and (SD) for implant primary stability using torque ratchet are (39.38±7.29) N/cm. At the same time, the ISQ values ranged in group (1) Mean and Standard deviation (SD) for implant stability quotient are (66.90±1.81) immediately were group (2) Mean and Standard deviation (SD) for implant stability quotient are (74.75±8.28) ISQ values. The results showed a statistically significant positive correlation between the insertion torque of the dental implant measured by torque rachet and ISQ v