Dental models made with an intraoral scanner: a validation study.

Area of Science:

• Dental modeling and measurement technologies.
• Orthodontic diagnostics and treatment planning.

Background:

• Accurate dental measurements are crucial for diagnosis and treatment planning.
• Traditional methods can be time-consuming and prone to error.
• Advancements in digital scanning offer potential improvements in accuracy and efficiency.

Purpose of the Study:

• To assess the validity and reproducibility of measurements from stereolithographic and 3D digital dental models.
• To compare the accuracy of these models against direct skull measurements.
• To evaluate the clinical significance of any discrepancies found.

Main Methods:

• Ten human skulls were scanned to create stereolithographic and digital models.
• Two observers performed repeated measurements of various dental arch parameters.
• Measurements included transversal distances, tooth widths, and arch segments.
• Arch length and tooth size discrepancies were calculated and statistically analyzed.

Main Results:

• Statistically significant differences were observed in measurements between stereolithographic and digital models.
• These differences were deemed clinically insignificant for practical applications.
• Digital models exhibited fewer statistically significant differences compared to stereolithographic models.
• Digital models generally demonstrated smaller measurement errors.

Conclusions:

• Both stereolithographic and digital dental models generated by intraoral scanners are valid for dental measurements.
• These models offer a reproducible method for assessing dentition parameters.
• Digital models present a slight advantage in terms of measurement accuracy and error reduction.