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Computerized tomography-assisted calculation of sinus augmentation volume.

Gerald Krennmair¹, Martin Krainhöfner, Harald Maier

¹Department of Prosthodontics, Dental School, University of Vienna, Austria. krennmair@aon.at

The International Journal of Oral & Maxillofacial Implants

|December 28, 2006

Summary

Calculating sinus lift augmentation volume using computerized tomography (CT) scans is crucial. Preoperative volume estimation aids in surgical planning, donor site selection, and material ratios for better patient outcomes.

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Area of Science:

Oral and Maxillofacial Surgery
Dental Implantology
Radiology

Background:

Sinus lift procedures are essential for dental implant placement in atrophic maxillae.
Accurate estimation of bone augmentation volume is critical for successful sinus lift outcomes.
Computerized tomography (CT) provides valuable cross-sectional data for volumetric analysis.

Purpose of the Study:

To calculate the required augmentation volume for sinus lift procedures based on cross-sectional CT scans.
To determine the volume needed for two distinct augmentation heights: 12 mm and 17 mm.

Main Methods:

Utilized area calculations from cross-sectional CT scans of 44 patients undergoing sinus lifts.
Calculated the bone volume necessary to achieve sinus floor elevations to 12 mm and 17 mm.

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Correlated augmentation height with the calculated bone augmentation volume.

Main Results:

Achieving a 12 mm sinus floor height required a mean augmentation of 7.2 mm, while 17 mm needed 12.4 mm.
The calculated augmentation volume was 1.7 cm³ for 12 mm and 3.6 cm³ for 17 mm.
A 5 mm increase in augmentation height (12 to 17 mm) doubled the required augmentation volume (100% increase). A significant correlation (r=0.78, P<.01) was found between augmentation height and volume.

Conclusions:

Preoperative calculation of sinus lift augmentation volume is vital for surgical planning.
Accurate volume estimation assists in selecting autogenous bone donor sites and determining bone graft material ratios.
Determining augmentation size aids in surgical approach, perioperative management, and cost assessment for patients and clinicians.