Radiographic Assessment of Normal Periapical Bone Density: A Descriptive Analysis Based on Digital Imaging

Area of Science:

• Dentistry
• Radiology
• Oral Anatomy

Background:

• Accurate alveolar bone density assessment is crucial for dental diagnosis and treatment planning.
• Panoramic radiographs provide relative bone density estimates.
• Limited data exists on normal periapical bone density in Iranian populations.

Purpose of the Study:

• To assess the radiographic density of normal periapical bone using panoramic imaging in an Iranian population.
• To establish baseline data for periapical bone density.
• To investigate variations in bone density based on sex, age, jaw, and anatomical region.

Main Methods:

• A descriptive cross-sectional study analyzed 458 digital panoramic radiographs.
• Regions of interest (1.5mm x 1.5mm) were selected in the anterior, premolar, and molar regions, within 2mm of the apical third of each tooth.
• Bone density was quantified using gray values (arbitrary units) via Digora software, with statistical analysis using independent t-tests and one-way ANOVA (α=0.05).

Main Results:

• Bone density was significantly higher in males (n=212) compared to females (n=246), and in older adults (35-50 years) versus younger adults (20-35 years).
• The mandible exhibited higher bone density than the maxilla.
• Density decreased from anterior to molar regions, with the anterior mandible showing the highest values. Significant differences were noted between the anterior mandible and maxilla, but not between premolar/molar regions of the jaws.

Conclusions:

• Panoramic radiography reveals consistent patterns in periapical bone density, influenced by sex, age, and jaw location.
• The anterior mandible demonstrates the highest bone density, while the maxilla shows increasing density from anterior to posterior regions.
• These findings provide valuable baseline data and suggest further validation using 3D imaging techniques.