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Updated: Oct 27, 2025

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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
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Delayed post-extraction implants placed using a modified Summers technique: Preliminary results of a single cohort
R Bettach1, F Goker2, S Khijmatgar2
1New York University, School of Dentistry, NY, USA.
Journal of Biological Regulators and Homeostatic Agents
|July 20, 2021
Summary
This study shows a modified Summers sinus lift protocol achieved a 97.5% dental implant survival rate in patients with atrophic maxilla, offering a safe alternative for complex cases.
Area of Science:
- Oral and Maxillofacial Surgery
- Periodontology
- Dental Implantology
Background:
- Atrophic posterior maxilla poses challenges for dental implant placement.
- Traditional sinus lift procedures may have limitations, especially in compromised sites.
Observation:
- A retrospective case series evaluated 40 patients undergoing a modified Summers sinus lift protocol.
- The protocol involved two-stage surgery with socket preservation followed by implant insertion using osseodensification and a modified sinus lift.
Findings:
- The overall implant survival rate was 97.5% after a mean follow-up of 28 months.
- Statistically significant marginal bone loss was observed at 6 and 12 months post-function.
- No biological or mechanical complications were reported.
Implications:
- This modified sinus lift technique is a safe and effective alternative for maxillary sinus floor augmentation.
- It is particularly beneficial for patients with periodontitis or infected sites in the atrophic posterior maxilla.
- The protocol may reduce implant failure risk in high-risk patients.

