Conventional Versus 3D Printing Duplication Techniques of Complete Denture

Not Applicable

Completed

• Conditions: Denture,Complete; Edentulous Alveolar Ridge
• Interventions: Device: Duplicated refitted complete denture made from conventionally heat-cured polymethyl methacrylate.; Device: Duplicated refitted complete denture made from 3D-printed CAD/CAM pink polymethylmethacrylate acrylic resin.; Device: Duplicated refitted complete denture made from 3D-printed CAD/CAM white polymethylmethacrylate acrylic resin.

• Registration Number: NCT06588140
• Lead Sponsor: Ain Shams University

Brief Summary

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.

Detailed Description

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.

Study Timeline

• Study Start: 2024-09-01
• Study First Submitted: 2024-09-05
• Study First Submitted QC: 2024-09-05
• Study First Posted: 2024-09-19
• Primary Completion: 2024-10-01
• Study Completion: 2024-11-01
• Status Verified: 2025-03
• Last Update Submitted: 2025-03-05
• Last Update Posted: 2025-03-06

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 20

Inclusion Criteria

1. Patients with old complete dentures without lost vertical dimension.
2. Patients with correct centric occluding relation.
3. The dentures should be esthetically and functionally satisfactory and exhibit reasonable retention and stability

Exclusion Criteria

1. The presence of ridge or soft tissue pathology.
2. Diminished saliva production.
3. A history of medications affecting saliva quantity or quality.
4. Patients with temporomandibular joint problems.
5. The presence of sever ridge undercut.
6. Debilitated patients

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
conventional heat-cured duplication technique.	Duplicated refitted complete denture made from conventionally heat-cured polymethyl methacrylate.	Duplication of refitted complete removable dentures by conventional heat-cured technique from heat-cured polymethyl methacrylate resin.
3d Printed CAD/CAM duplication technique from Pink polymethyl methacrylate base resin	Duplicated refitted complete denture made from 3D-printed CAD/CAM pink polymethylmethacrylate acrylic resin.	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.
3d Printed CAD/CAM duplication technique from white polymethyl methacrylate base resin	Duplicated refitted complete denture made from 3D-printed CAD/CAM white polymethylmethacrylate acrylic resin.	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.

Primary Outcome Measures

Name	Time	Method
Assessment of Retention of maxillary complete denture	at the time of denture insertion	The retention of a maxillary complete denture will be assessed using a digital force gauge meter, with retention measurements recorded in Newtons.

Secondary Outcome Measures

Name	Time	Method
Evaluation of occlusal force distribution between right and left side	at the time of denture insertion	Occlusal force distribution will be assessed using the T-Scan III, with the results expressed as a percentage.

Trial Locations

Locations (1)

Ain Shams University; 🇪🇬 Cairo, Egypt