Accuracy of Fully Guided Implant Placement Using Bone-Supported Stackable Surgical Guides in Completely Edentulous...

Area of Science:

• Oral and Maxillofacial Surgery
• Dental Implantology
• Computer-Aided Implantology

Background:

• Precise dental implant positioning is crucial for prosthetic rehabilitation, especially in edentulous patients lacking anatomical landmarks.
• Computer-assisted planning and surgical guides are increasingly used to improve implant placement accuracy.

Purpose of the Study:

• To evaluate the accuracy of implant placement in the edentulous maxilla and mandible using computer-assisted planning.
• To assess a bone-supported stackable surgical guide protocol for full-arch rehabilitation.

Main Methods:

• Retrospective analysis of 60 implants in 15 completely edentulous patients.
• Utilized a dual-scan protocol for planning and a bone-supported stackable guide for osteotomy and implant insertion.
• Superimposed postoperative CBCT scans with preoperative plans to measure deviations.

Main Results:

• Mean angular deviation was 1.25° ± 0.80°.
• Mean 3D linear deviations were 0.96 ± 0.57 mm (neck) and 1.07 ± 0.56 mm (apex).
• Mean depth deviation was 0.37 ± 0.58 mm, all within safety thresholds (p < 0.05).

Conclusions:

• The bone-supported stackable surgical guide protocol demonstrated high accuracy for full-arch rehabilitation in edentulous jaws.
• This method ensures predictable implant placement by eliminating mucosal resilience and providing rigid fixation.
• It offers a reliable alternative to dynamic navigation for screw-retained bar-supported prostheses.