THE ACCURACY OF ADAPATION OF RESIN BASIS FABRICATEED BY THRE DIFFERENT PROCESSING TECHNIQUES FOR MAXILLARY COMPLETE DENTURE (AN IN INVITRO STUDY) | ||||
| Egyptian Dental Journal | ||||
| Article 18, Volume 69, Issue 2 - Serial Number 4, April 2023, Page 1367-13676 PDF (1.34 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2023.185425.2403 | ||||
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| Author | ||||
nada el khourazaty  
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| Associate Professor, Prosthodontics, Faculty of Oral and Dental Medicine, Cairo University, Newgiza University | ||||
| Abstract | ||||
| Abstract Objectives: the present study was conducted to compare the adaptation accuracy of three different denture base materials for maxillary complete denture; compression molded heat cured polymethyl methacrylate (PMMA), injection molded thermoplastic resin and microwave processed denture base resin. Materials and Methods: 18 casts were duplicated from a completely edentulous model for the upper arch, then divided equally into three groups: group A (compression molded PMMA), group B (injection molded thermoplastic resin), group C (microwave processed denture base). The dentures on their respective casts were sectioned 5 mm anterior to the posterior border and measurement of the posterior border gap between the denture base and the cast was measured using a traveling microscope at the mid-palatal, right and left crestal regions. The data was collected and statistically analyzed. Results: the least gap measurement was found in group B at the crestal and mid-palatal sections, while the highest gap measurement was found in group C followed by group A. A statistically significant difference was found between the three groups at the crestal and mid-palatal sections, and between the crestal and mid-palatal measurements within each group. Conclusion: injection molded thermoplastic resin showed the highest adaptation accuracy as measured by gap distance, followed by compression molded heat cured PMMA and then the microwave processed denture base resin. | ||||
| Keywords | ||||
| Key words: denture base; thermoplastic resin; compression molding; microwave polymerization; adaptation accuracy | ||||
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