3D Surface Scanning-A Novel Protocol to Characterize Virtual Nickel-Titanium Endodontic Instruments.

Area of Science:

• Materials Science
• Biomedical Engineering
• Manufacturing Technology

Background:

• The geometry of nickel-titanium (NiTi) instruments is critical for their performance in various applications.
• Accurate virtual models are needed for advanced analysis and educational purposes.
• Existing methods for characterizing NiTi instrument geometry may have limitations.

Purpose of the Study:

• To validate a 3D surface scanning method for creating reliable virtual models of NiTi instruments.
• To assess the precision, accuracy, and reproducibility of the proposed scanning technique.
• To compare the quality of 3D models generated by the optical scanner with other technologies like micro-CT.

Main Methods:

• Sixteen NiTi instruments were scanned using a high-resolution, 12-megapixel optical 3D scanner.
• Methodological validation involved comparing 3D model measurements with scanning electron microscopy (SEM) data.
• Reproducibility was assessed by repeated measurements of selected instruments, analyzing 2D and 3D parameters.

Main Results:

• The 3D surface scanning method produced reliable and precise virtual models of NiTi instruments, with discrepancies ranging from 0.0002 to 0.0182 mm.
• High reproducibility was observed for measurements derived from the 3D models.
• The optical scanner generated superior quality 3D models compared to micro-CT technology.

Conclusions:

• The high-resolution optical 3D scanning method is a validated and precise technique for virtual NiTi instrument modeling.
• The generated virtual models are suitable for in silico experiments, Finite Element Analysis, and educational applications.
• This method offers a high-quality alternative to existing technologies for NiTi instrument characterization.