Acta Scientific Dental Sciences (ISSN: 2581-4893)

Research Article Volume 4 Issue 2

Accuracy and Reliability of CBCT Scan in Obtaining Digital 3D Model from Dental Plaster Model for Orthodontic Space Analysis: Diagnostic Accuracy Study

Sara Alaa El-din1*, Farid Medhat2 and Hossam Kandil3

1B.D.S, Faculty of Dentistry, Cairo University, Egypt
2Associate Professor of Oral and Maxillofacial Radiology, Faculty of Dentistry, Cairo University, Egypt
1Professor of Oral and Maxillofacial Radiology, Faculty of Dentistry, Cairo University, Egypt

*Corresponding Author: Sara Alaa El-din, B.D.S, Faculty of Dentistry, Cairo University, Egypt.


Received: December 09, 2019; Published: January 03, 2020



Objective: This study was conducted to evaluate accuracy of CBCT derived digital models in terms of linear measurements compared to direct measurements on dental plaster models for orthodontic space analysis.

Methods: 16 plaster models were digitized using Planmeca Promax 3D mid CBCT machine and 28 anatomical landmarks were identified on both the plaster models and their digital counterparts. Linear measurements were taken for the inter-molar, inter-canine and mesio-distal teeth width on plaster models using digital caliper and they were considered as the gold standard in the study. Then, the same measurements were taken on digital models using third party software (In Vivo 5.3.1 Dental Software) for comparison.

Results: The statistical analysis of the recorded measurements showed a mean value of 0.14 mm (SD. 0.34) for the inter-molar width, 1.55 mm (SD. 4.03) for the inter-canine width and 0.11 mm (SD 0.1) for the mesio-distal teeth width. There was neither statistical significant nor clinical relevant difference regarding the inter-molar width. On the contrary, the mesio-distal teeth width showed statistical significant difference yet, this difference did not translate to clinical relevance. Finally, the inter-canine width showed a non-statistically significant difference which did translate to clinical relevance.

Conclusion: CBCT derived digital models provide accurate and reliable linear measurements for orthodontic space analysis except for the inter-canine width measurements.

Keywords: CBCT; Digital Models; Plaster Models; Orthodontic Space Analysis; Linear Measurements



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Citation: Sara Alaa El-din., et al. “Accuracy and Reliability of CBCT Scan in Obtaining Digital 3D Model from Dental Plaster Model for Orthodontic Space Analysis: Diagnostic Accuracy Study”.Acta Scientific Dental Sciences 4.2 (2020): 02-05.


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