Different Manufacturing Techniques Accuracy of Palatal Obturator for Acquired Palatal Defect In Treatment Of Post COVID-19 Associated Mucormycosis (CAM)

Document Type : Original Article

Authors

1 Associated Professor of Prosthodontics, Prosthodontics, Future University in Egypt, Cairo, Egypt.

2 Lecturer of Oral and Maxillofacial Prosthodontics, Oral and Maxillofacial Prosthodontics department Ain Shams University in Egypt

Abstract

1.The purpose of this study was to evaluate the fit and accuracy of conventional lost wax technique and selective laser melting printing technique for fabrication of palatal obturator for acquired palatal defect in treatment of post coronavirus disease associated Mucormycosis (CAM).
2.Methods: Twelve patients had two CoCr alloy frameworks constructed with two different manufacturing techniques. The conventional lost wax and selective laser melting printing techniques. The fitting surfaces of both frameworks were scanned. The master cast of the maxillary defect was scanned by desktop scanner. The Standard Tessellation Language file of the master model was inverted, and the fitting surface scan was superimposed with a best-fit alignment using surface matching software to evaluate the adaptation of the frameworks between the superimpositions with the virtual model. The color maps were calculated at rests, clasps and palate.
3.Results: Statistically significant difference between the two studied groups at the palate and defect lines area. While at the rests and clasp areas no significant difference was recorded.
4-Conclusion: The selective laser melting printing technique for fabrication of palatal obturator of acquired palatal defect in treatment of CAM was found to be comparable regarding the fit and accuracy to those fabricated with the conventional lost wax technique.

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Egyptian Dental Journal
Volume 69, Issue 3 - Serial Number 3
Fixed Prosthodontics, Removable Prosthodontics and Dental Materials
July 2023
Pages 2093-2102

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