[Non-invasive evaluation of an injectable bone substitute]

Area of Science:

• Dental surgery
• Biomaterials science
• Medical imaging

Background:

• Alveolar ridge preservation is crucial after dental avulsion to maintain bone structure.
• Current measurement techniques lack sufficient reliability and precision for evaluating bone filling.
• Standardized radiography has limitations in assessing the complex 3D nature of alveolar defects.

Purpose of the Study:

• To investigate the reliability of computed tomography (CT) imaging for evaluating alveolar filling.
• To compare CT imaging accuracy against retroalveolar radiography, direct measurements, and scanning electron microscopy (SEM).
• To assess the precision of CT-based density analysis for bone substitute assessment.

Main Methods:

• In vivo study on three beagles involving mandibular premolar extraction and alveolar socket filling.
• Alveoli were filled with an injectable bone substitute (calcium phosphate mineral load with hydroxypropyl methylcellulose).
• Measurements were performed using CT imaging, retroalveolar radiography, direct measurements, and SEM.

Main Results:

• CT imaging demonstrated superior precision in evaluating alveolar filling compared to retroalveolar radiography.
• Both visual and automatic detection of density changes on CT images provided enhanced accuracy.
• Density curve analysis on CT scans further improved the precision of measurements.

Conclusions:

• CT imaging is a reliable and precise tool for evaluating alveolar ridge preservation and bone substitute integration.
• CT-based density analysis offers significant advantages over conventional radiographic techniques.
• This advanced imaging modality can improve clinical assessment and treatment planning in restorative dentistry.