Radiographic Evidence of Immature Bone Architecture After Sinus Grafting: A Multidimensional Image Analysis Approach

Area of Science:

• Oral and Maxillofacial Surgery
• Biomaterials Science
• Radiology and Imaging

Background:

• Radiographic assessment of sinus lifts often focuses on volume, neglecting bone microarchitecture.
• Two-dimensional imaging limitations in evaluating regenerated bone quality are noted.
• Novel quantitative analyses are needed for early bone healing assessment.

Purpose of the Study:

• To evaluate early trabecular bone changes in grafted maxillary sinuses.
• To utilize fractal dimension and texture analysis on panoramic radiographs.
• To compare grafted sites with native bone in the tuberosity region.

Main Methods:

• Retrospective analysis of 150 patients undergoing sinus floor augmentation with xenohybrid grafts.
• Postoperative panoramic radiographs analyzed at 6 months.
• Quantitative image analysis including fractal dimension (FD) and gray-level co-occurrence matrix (GLCM) features.

Main Results:

• Grafted areas showed significantly lower fractal dimension (FD) and contrast, indicating reduced complexity.
• Higher homogeneity and mean gray-level intensity in grafted sites suggest a uniform, immature pattern.
• Significant differences in energy and correlation were observed between grafted and native bone.

Conclusions:

• Radiographic volume stability does not equate to mature bone architecture at 6 months.
• Volumetric measurements alone are insufficient for assessing biological bone maturation.
• Advanced textural and fractal analysis can aid clinical decisions on implant placement timing.