Comparison of Occlusal Contact Assessed by Intraoral Scanning and T-scan System
Keywords:
Intraoral scanning, Occlusion assessment, T-scan system, Occlusal force, Interocclusal spaceAbstract
Background: Currently, intraoral scanning is commonly used to simulate the details of the oral cavity, including the recording and assessment of occlusion. However, there is limited evidence regarding the accuracy of occlusal contact and the relationship with occlusal force. Objective: To investigate the relationship between occlusal contacts obtained from intraoral scanning and those identified using Arti-Fol, the gold standard method for occlusal assessment. Additionally, to assess the relationship between interocclusal space from intraoral scanning and occlusal force measured by the T-Scan system. Method: A cross-sectional study was conducted in 22 volunteers. Occlusion was recorded at the canines, premolars, and first molars using Arti-Fol, intraoral scanning, and the T-Scan system. Relationships between occlusal contact from intraoral scanning and Arti-Fol were analyzed using Pearson's chi-squared test and diagnostic test. The relationship between interocclusal space and occlusal force was analyzed using Spearman's correlation coefficient and linear regression (p-value < .05). Result: The occlusal contact from intraoral scanning showed a statistically significant association with Arti-Fol. The predictive performance, including sensitivity, specificity, positive predictive value, and negative predictive value, was 69.8%, 89.3%, 83.1%, and 79.8%, respectively. The area under the curve (AUC) was 0.796. Moreover, interocclusal space and occlusal force on the first molar showed a significant inverse correlation. Conclusion: The occlusal contacts obtained from intraoral scanning were similar to those obtained by the standard method, with accuracy ranging from fair to good. Additionally, a statistically significant inverse correlation was found between interocclusal space and occlusal force on the first molar. Therefore, intraoral scanning is a viable method for recording and assessing occlusion in clinical practice.
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