Accuracy and reliability of measurements performed using two different software programs on digital models generated...

Area of Science:

• Orthodontics and Dental Technology
• Digital Dentistry
• Biomedical Imaging

Background:

• Traditional dental measurements rely on physical plaster models.
• Advancements in digital scanning offer potential for improved accuracy and efficiency.
• Evaluating different scanning technologies and software is crucial for clinical adoption.

Purpose of the Study:

• To compare the accuracy and reliability of measurements from digital models generated by laser and computed tomography (CT) scanners.
• To assess the influence of two different software programs on measurement accuracy.
• To determine if digital models and software can be used interchangeably with traditional plaster models.

Main Methods:

• Thirty plaster models were scanned using a 3Shape laser scanner and a Flash CT scanner.
• Measurements were taken on both plaster and digital models using digital calipers and two software programs (Ortho Analyzer and Digimodel®).
• Forty-two distinct dental measurements were recorded, including tooth dimensions, occlusal relationships, and arch dimensions.

Main Results:

• No statistically significant differences were found between plaster and digital model measurements (ANOVA).
• High intraclass correlation coefficients and acceptable Bland-Altman limits of agreement were observed for both scanning methods.
• The software used did not significantly impact the accuracy of the measurements.

Conclusions:

• Digital models generated from plaster casts via laser or CT scanning are accurate and reliable for dental measurements.
• The choice of scanning method (laser vs. CT) and software does not compromise measurement accuracy.
• Both digital fabrication methods and software programs can be used interchangeably in clinical practice.