Retention of Complete Denture Using Rapid Prototyping

Not Applicable

• Conditions: Retention of 3D Printed Dentures
• Interventions: Other: conventional dentures; Other: 3d printed denture

• Registration Number: NCT03507179
• Lead Sponsor: Cairo University

Brief Summary

Nineteen patients will be selected from the clinic following the inclusion and exclusion criteria. Each one of them will receive two dentures. The first denture will be a conventional complete denture while the second denture will be a complete denture made by Rapid prototyping method.

For both groups, a preliminary impression will be made \& after pouring the primary impression, self-cured acrylic resin trial denture bases with a wax rim will be constructed on the primary casts for the upper \& lower arches for a jaw relation record. A facebow record will be used to mount the upper cast, while the lower cast will be mounted using a centric relation record. Setting of artificial teeth will be performed, then the denture will be tried in patient's mouth. Functional impression will be taken during the try in stage which.

For the first denture, the functional impression will be poured in normal way to obtain the master cast. Then Processing will be done in normal way and the denture will be finished and polished and delivered to the patient.

But for the second denture construction CBCT scanning of the try in with the functional impression will be done to obtain STL file then denture base manufacturing will be done by 3D printing.

For group A and group B Retention will be measured for the upper denture immediately, with a wash out period one month between the two dentures.

Detailed Description

Heat processed denture base is the treatment of choice for most of edentulous patients and it is considered as the golden standard and the main comparator for the new techniques. But using Heat Cured Acrylic resin would require many laboratory steps which introduce several errors . Meanwhile, the introduction of rapid prototyping method with high accuracy which eliminates some of the laboratory steps was the reason for choosing it to compare it with the conventional method.

Study Timeline

• Status Verified: 2018-04
• Study First Submitted: 2018-04-02
• Study First Submitted QC: 2018-04-14
• Last Update Submitted: 2018-04-14
• Study First Posted: 2018-04-24
• Last Update Posted: 2018-04-24
• Study Start: 2018-05-04
• Primary Completion: 2018-10-04
• Study Completion: 2018-11-04

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 2

Inclusion Criteria

1. Age ranging from 40-70 years.
2. Cooperative patients.
3. male or female patients

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Exclusion Criteria

1. Pathological changes of residual ridges.
2. Patients with any systemic diseases.
3. Patients with xerostomia.
4. Patients with flabby and flat ridges.
5. Patients with allergy to resins.
6. Patient with sever undercuts, or irregular bony exostosis. -

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
conventional dentures	conventional dentures	a complete denture made through conventional processing technique
3d printed dentures	3d printed denture	a complete denture made through 3D printing

Primary Outcome Measures

Name	Time	Method
retention	immediately after denture construction	We will Determine the geographic center for upper denture base to measure retention then A loop will be attached to each denture base at the position of geographic center using clear self cure acrylic resin and the retention will be measured by applying the forces perpendicular to the denture using Digital Force Meter Each base will be tested 3 times and the average will be calculated. Then the loop will be removed and the denture will finished and polish. Retention will be measured immediately after denture insertion.