Introduction This report presents a fully digital workflow for maxillary full‐arch rehabilitation that integrates trans‐sinus implant placement into a stackable guided surgery system. The technique incorporates a digitally planned antrostomy guide to enable controlled lateral sinus access. Methods A sequential stackable guide protocol was developed, including key, base, drive, and prosthetic templates, together with a custom antrostomy guide. The system was designed to translate the virtual plan into precise implant positioning and reproducible lateral window preparation for trans‐sinus implant placement. Results The digital workflow enabled accurate localization of the sinus window and guided insertion of a tilted trans‐sinus implant along the planned trajectory. The combined guide system provided controlled sinus access and stable implant placement suitable for immediate loading. Conclusion Integrating a digitally planned antrostomy guide within a stackable surgical system enhances precision in full‐arch rehabilitations requiring trans‐sinus implants. This digital technique expands the applicability of guided surgery to challenging posterior maxillary scenarios.
Manfredini et al. (Thu,) studied this question.