Implant Placement With a Guided Surgery System Based on Stress Analyses Utilizing the Bone Density: A Clinical Case Report

The bone density information in the MSCT data for the mandible was analyzed with simulation software for implant placement site and direction. The red areas have high bone density corresponding to D1 of Misch's classification.¹

Sites for two implants were designated at the lateral incisor region on both sides.

3D finite element model. Two titanium implants are set at the lateral incisor region, and the stress values are measured in the bone around the implant (top, middle, and tip areas) under 50 Ncm of load at the right first molar occlusal surface.

Implant size according to the stress distribution. The highest stress value is observed at the top part of the narrow implant (1.8 mm in diameter), while the lowest stress value is found in the longest implant (3.75 × 14.0 mm). There is little difference in the stress levels between the implants of 3.75 × 7.0 and 3.75 × 10.0 mm. For the implants of the same length (3.75 × 10.0 and 5.0 × 10.0 mm), the wider implant shows a smaller stress value at the top part of the implant.