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Bone reformation with sinus membrane elevation: a new surgical technique for maxillary sinus floor augmentation
Stefan Lundgren1, Sten Andersson, Federico Gualini
1Department of Oral and Maxillofacial Surgery, Umeå University, Umeå, Sweden. stefan.lundgren@odont.umu.se
Clinical Implant Dentistry and Related Research
|February 25, 2005
Summary
Sinus membrane elevation without bone grafts can augment the maxillary sinus floor, promoting new bone formation for dental implants. This technique shows potential for predictable bone augmentation.
Area of Science:
- Oral and Maxillofacial Surgery
- Regenerative Dentistry
- Implantology
Background:
- Maxillary sinus floor augmentation is crucial for dental implants in the posterior maxilla.
- Traditional methods use bone grafts or substitutes.
- A case report suggested membrane elevation alone might promote bone formation, but predictability was unknown.
Purpose of the Study:
- To evaluate sinus membrane elevation with simultaneous implant insertion, without grafting material, as a valid bone augmentation technique.
- To determine the predictability of this approach for maxillary sinus floor augmentation.
Main Methods:
- 10 patients underwent 12 sinus floor augmentations.
- A bone window was created, the sinus membrane elevated and sutured.
- Implants were inserted, protruding into the sinus; the bone window was replaced.
- Bone height, implant stability (Resonance Frequency Analysis), and CT scans were used for evaluation.
Main Results:
- 19 implants were placed with an average residual bone height of 7 mm.
- All implants remained stable; CT scans confirmed new bone formation.
- Mean implant stability quotient values remained consistently high throughout the study.
Conclusions:
- Sinus membrane elevation without grafts promotes significant bone formation.
- The technique allows bone regeneration via guided tissue regeneration principles.
- Sinus membrane elevation is a predictable technique for maxillary sinus floor bone augmentation.