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Twenty completely edentulous patients with old, removable dentures with ill-fitting maxillary dentures, proper vertical dimension, and proper occlusion will be recruited for this trial. They will be rehabilitated with duplicated complete dentures manufactured by conventional and two different 3D-printed CAD-CAM Complete Removable Dentures techniques.
Outcomes will be evaluated, including denture retention, which will be evaluated using a digital force gauge, and occlusal force distribution by using a t-scan.
The study will be conducted at the outpatient clinic of the Oral and Maxillofacial Prosthodontics Department, Faculty of Dentistry, Ain Shams University. This within-subject controlled clinical trial will involve twenty completely edentulous patients with old, ill-fitting maxillary complete dentures, who will be selected and recruited following approval by the Research Ethics Committee of the Faculty of Dentistry, Ain Shams University (FDASU-REC). These patients will be rehabilitated with duplicated complete dentures produced through conventional methods and two distinct 3D-printed CAD/CAM techniques.
Group I: The duplication of a refitted complete removable denture will be performed using the conventional heat-cured technique.
Group II: The refitted complete denture will be duplicated using a 3D-printed CAD/CAM technique, where the denture base will be printed separately with pink resin, and the teeth will be printed as a single unit in tooth-colored resin, followed by assembly of the two components.
Group III: The refitted complete denture will be duplicated using a 3D-printed CAD/CAM technique, with the entire denture printed as a single unit in tooth-colored resin, and the denture flange veneered with pink resin.
Outcomes will be evaluated by measuring denture retention with a digital force gauge and occlusal force distribution using the T-Scan system. The collected data will be recorded, tabulated, and subjected to statistical analysis using appropriate tests for group comparisons.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| conventional heat-cured duplication technique. | Active Comparator | Duplication of refitted complete removable dentures by conventional heat-cured technique from heat-cured polymethyl methacrylate resin. |
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| 3d Printed CAD/CAM duplication technique from Pink polymethyl methacrylate base resin | Experimental | Duplication of a refitted complete removable denture will be produced using a 3D-printed CAD/CAM technique where the denture base will be printed separately using pink base polymethyl methacrylate resin, and the teeth will be printed as one unit using tooth-colored resin, followed by assembling the two components. |
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| 3d Printed CAD/CAM duplication technique from white polymethyl methacrylate base resin | Experimental | Duplication of a refitted complete removable denture will be produced using a 3D-printed CAD/CAM technique where the denture will be printed as a single unit using tooth-colored resin, and the denture flange will be veneered with pink resin. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Duplicated refitted complete denture made from conventionally heat-cured polymethyl methacrylate. | Device | The duplication of a refitted complete removable denture will be performed using conventional heat-cured polymethyl methacrylate through the conventional heat-cured polymerization technique. |
| Measure | Description | Time Frame |
|---|---|---|
| Assessment of Retention of maxillary complete denture | The retention of a maxillary complete denture will be assessed using a digital force gauge meter, with retention measurements recorded in Newtons. | at the time of denture insertion |
| Measure | Description | Time Frame |
|---|---|---|
| Evaluation of occlusal force distribution between right and left side | Occlusal force distribution will be assessed using the T-Scan III, with the results expressed as a percentage. | at the time of denture insertion |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Amany M Saad Farahat, PHD | Ain Shams Univeristy | Principal Investigator |
| Yasmine S Elsherbeeny, PHD | Ain Shams Univeristy | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Ain Shams University | Cairo | 12345 | Egypt |
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| Duplicated refitted complete denture made from 3D-printed CAD/CAM pink polymethylmethacrylate acrylic resin. | Device | The duplication of a refitted complete removable denture will be performed using a 3D-printed CAD/CAM technique, where the denture base is printed separately with pink polymethyl methacrylate resin, and the teeth are printed as a single unit using tooth-colored resin, followed by the assembly of the two components. |
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| Duplicated refitted complete denture made from 3D-printed CAD/CAM white polymethylmethacrylate acrylic resin. | Device | The duplication of a refitted complete removable denture will be performed using a 3D-printed CAD/CAM technique, where the denture base is printed as a single unit using tooth-colored resin, and the denture flange will be veneered with pink polymethyl methacrylate resin. |
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