Cost-Effective Full-Color 3D Dental Imaging Based on Close-Range Photogrammetry

Area of Science:

• Biomedical Engineering
• Dental Technology
• Medical Imaging

Background:

• Conventional 2D dental imaging is used for documentation.
• High-precision 3D dental scanning is essential for specialized procedures like orthodontics and implant surgery.
• A gap exists between conventional 2D imaging and high-precision 3D scanning.

Purpose of the Study:

• To develop a cost-effective 3D dental imaging technique.
• To bridge the gap between conventional dental photography and high-precision 3D scanning.
• To improve patient dental care through advanced imaging.

Main Methods:

• Developed a 3D imaging technique based on close-range photogrammetry (CPDI).
• Evaluated CPDI on in vitro dental models and in vivo teeth.
• Conducted a parametric study on depth of field and specular reflection for optimal reconstruction.

Main Results:

• Optimal results achieved with an f/5.6 lens and no circular polarizer.
• Generated 3D scans with 57.7 ± 3.2% and 82.4 ± 2.7% of points within ±0.1 mm and ±0.2 mm error margins, respectively.
• Successfully reconstructed high-quality 3D models of the anterior arch with detailed color textures.

Conclusions:

• CPDI provides accurate 3D dental models representing morphology and features.
• The technique is clinically relevant and versatile for various dental applications.
• CPDI offers a cost-effective alternative for detailed dental imaging.