Evaluation of scanning zinc oxide relining impression material for construction of a newly designed CAD CAM maxillary complete denture using an intraoral scanner | ||
| Alexandria Dental Journal | ||
| Articles in Press, Accepted Manuscript, Available Online from 06 October 2025 PDF (708.07 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/adjalexu.2025.388901.1631 | ||
| Authors | ||
| Jasmin Ragheb* 1; Ahmed Abd Elgelel2; Ingy Hassan1 | ||
| 1Prosthodontics, faculty of dentistry, Alexandria university, Alexandria, Egypt | ||
| 2Professor of Prosthodontics, Faculty of Dentistry, Alexandria University. | ||
| Abstract | ||
| Introduction: Accuracy of intraoral scanning is challenged by the lack of anatomical landmarks and soft tissue detail. Scanning zinc oxide impressions may enhance reliability by providing a well-defined surface which can be a considered as a part of digital workflow for complete denture construction. Objective: The study aimed to evaluate the reliability of certain anatomical regions when scanning a zinc oxide impression for a completely edentulous maxilla using intraoral scanner. Methods: A patient with a loose maxillary denture was selected for the study. An impression was taken using the patient’s denture as a custom tray, with zinc oxide impression material after border molding. This impression was scanned using a lab scanner (reference file). To evaluate the scanning reliability, the same impression was scanned 12 times with an intraoral scanner. The scans were compared using Geomagic software to assess differences in reliability across regions. One Way ANOVA test followed by Tukey’s post hoc test with Bonferroni correction was used p-value<0.05 Results: The one-way ANOVA results showed that the midpalatal suture region had higher reliability than all other regions scanned from the zinc oxide impression. Pairwise comparisons showed that there was a statistically significant difference between midpalatal suture, the posterior palatal seal, peripheral border, ridge and inner seal (P < 0.001). This indicates regional variation in scan reliability, with MPS being the most reliable area. Conclusion: Different anatomical regions affect the reliability of scanning zinc oxide impressions using intraoral scanner in completely edentulous maxilla. | ||
| Keywords | ||
| Keywords: Zinc oxide; reliability; Intraoral scanner; Midpalatal suture | ||
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