Full-Arch Trans-Sinus Implant Placement Using a Stackable Surgical Guide With Digitally Planned Antrostomy: A Case...

Area of Science:

• Dentistry
• Oral Surgery
• Digital Dentistry

Background:

• Maxillary full-arch rehabilitation often requires complex procedures like trans-sinus implant placement.
• Traditional methods can present challenges in achieving precise implant positioning and adequate sinus access.

Purpose of the Study:

• To present a fully digital workflow for maxillary full-arch rehabilitation.
• To integrate trans-sinus implant placement into a stackable guided surgery system.
• To develop a digitally planned antrostomy guide for controlled lateral sinus access.

Main Methods:

• A sequential stackable guide protocol was developed, including key, base, drive, and prosthetic templates.
• A custom antrostomy guide was designed for controlled lateral sinus access.
• The system translates virtual surgical plans into precise implant positioning and guided lateral window preparation.

Main Results:

• The digital workflow allowed accurate localization of the sinus window.
• Guided insertion of tilted trans-sinus implants was achieved along planned trajectories.
• The combined guide system facilitated controlled sinus access and stable implant placement for immediate loading.

Conclusions:

• Integrating a digitally planned antrostomy guide enhances precision in trans-sinus implant rehabilitation.
• This digital technique expands guided surgery applications to challenging posterior maxillary cases.
• The workflow offers a reproducible method for complex full-arch restorations.