Comparison of adaptation accuracy between three different denture base materials for the completely edentulous upper arch. An invitro study. | ||||
| Egyptian Dental Journal | ||||
| Article 25, Volume 68, Issue 3 - Serial Number 4, July 2022, Page 2713-2719 PDF (1.05 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2022.137479.2101 | ||||
 View on SCiNiTO | ||||
| Author | ||||
Nagla Nassouhy  
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| Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Cairo University, New Giza University | ||||
| Abstract | ||||
| Objectives: this study was conducted to compare the adaptation accuracy of three different denture base materials for the edentulous maxilla; compression molded heat cured polymethyl methacrylate (PMMA), injection molded thermoplastic resin and versacryl. Methodology: a completely edentulous model for the upper arch was duplicated to 15 stone casts, then divided equally into three groups: group I (compression molded PMMA), group II (injection molded thermoplastic resin), group III (versacryl). The dentures on their respective casts were sectioned 5 mm anterior to the posterior border and the gap distance between the denture base and the cast was measured using a traveling microscope at the mid-palatal and crestal regions. The data was collected and statistically analyzed. Results: the least gap measurement was found in group II at the crestal and mid-palatal sections, while the highest gap measurement was found in group I followed by group II. 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. Conclusions: injection molded thermoplastic resin showed the highest adaptation accuracy as measured by gap distance, followed by versacryl and then compression molded heat cured PMMA. | ||||
| Keywords | ||||
| thermoplastic resin; compression molding; injection molding; denture base materials | ||||
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