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Updated: May 21, 2026
Real-Time Dynamic Navigation System for the Precise Quad-Zygomatic Implant Placement in a Patient with a Severely Atrophic Maxilla
Published on: October 18, 2021
Unusual anchor pins placement and protocol deviations during computer-based implant placement in a patient with
A Pozzi1, M Tallarico, A Barlattani
1Department of Oral Rehabilitation Tor Vergata University of Rome, Italy.
Abstract:
The aim of the study was to describe an unusual method to stabilize the surgical template during the treatment of a severely resorbed edentulous mandible by means of computer-guided implant surgery. Pre-operative computer-based planning revealed the difficulty to stabilize the surgical template in a 67-year-old healthy woman. A deviation of the original NobelGuide™ protocol was performed to ensure the stability of the surgical template: four anchor pins were used to stabilize the surgical template, two in the buccal side of the anterior template and two unusual pins were placed in the lingual site. Four straight TiUnite® Nobel Biocare™ implants were then placed, according to a modified All-on-4™ concept procedure, to avoid graft procedures and to reduce the cumulative chair-side treatment time and costs. A temporary restoration was placed immediately after implant placement. Three months later a definitive, full acrylic restoration was delivered.
