CAD - CAM based 3D printed surgical guides for posterior mini-screw placement

Orthodontic mini-screws provide absolute anchorage for treatments like maxillary intrusion, anterior retraction and distalization with precise placement to prevent complications. Hence, ten patients (mean age 27.8 years) were divided into two groups: direct insertion and CAD/CAM surgical guide (CS). Cone beam computer tomography (CBCT) and 3D software were used to plan mini-screw placement, with the CS group receiving 3D-printed, surgical guides for controlled insertion. Pre- and post-operative digital models were compared to assess deviations in placement. Results showed that CAD/CAM-based surgical guides enhanced accuracy by ensuring safe and predictable mini-screw insertion while minimizing complications.