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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT04873219
Other study ID # MDGPA_03
Secondary ID
Status Completed
Phase N/A
First received
Last updated
Start date September 15, 2018
Est. completion date March 1, 2020

Study information

Verified date April 2021
Source University of Geneva, Switzerland
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

A crossover clinical trial investigates two novel CAD/CAM techniques for complete removable dental prostheses for edentulous patients, milling and rapid prototyping (3D-printing) in a clinical setting of an undergraduate student clinic. Outcome parameters concern the dentures' trueness, retention, stability, esthetics and occlusion. Secondary outcome parameters include willingness to pay and prosthetic maintenance need.


Description:

The process of fabricating complete removable dental prostheses (CRDPs) by novel CAD/CAM manufacturing technique has in the recent years gained immense popularity with clinicians as well as dental technicians worldwide. CRDPs can be manufactured by a subtractive process (milling technique) or by an additive process (rapid prototyping or 3D printing). The milling technique is the frequently employed technique for fabricating CRDPs; it is well documented in terms of precision, material properties, and a few clinical trials have even demonstrated good patient and clinician satisfaction. The rapid prototyping (3D printing) method however, is still in the developing stages for this particular application. Although both methods seem to yield clinically acceptable results, there are no studies in current literature which compare the CRDPs manufactured by the two CAD/CAM methods. The proposed single-center, double-blind, randomized crossover clinical trial specifically aims to test the following hypothesis that: • there is no difference between the two types of CRDPs (milled, and rapidly prototyped) in terms of trueness, denture quality, patient satisfaction, prosthodontic maintenance and adjustments requirements and incurred costs. Fifteen pre-doctoral final year dental students and their respective completely edentulous patients will be recruited in this RCT. A traditional clinical complete denture protocol will be followed to record the clinical steps. Two sets of CRDPs will be manufactured (CAD/CAM milling and 3D printing). The CRDPs will be randomized before denture insertion and then delivered to the patient. Each CRDPs will be worn by the patient for a period of 6 weeks, before crossing over. Clinical examinations and data collection will be performed at baseline (T0), at denture insertion stage (T1), and at the end of 6 weeks (T2) for each of the investigated CRDPs. Assessments will comprise of comparison of trueness of denture intaglio surfaces against the corresponding master cast, denture quality assessments, patient satisfaction scores, prosthodontic maintenance needs and willingness-to-pay analysis and cost minimization analysis. This RCT will contribute significantly in the development of CAD/CAM treatment concepts for fabricating complete removable dental prostheses (CRDPs). The study would highlight the differences, if any, between the two manufacturing methods for CRDPs, in terms of trueness, quality of the prostheses, clinician and patient satisfaction and also incurred costs. Clinically, the planned RCT hopes to demonstrate the feasibility of these novel treatment concepts in frail elderly edentates. A significant reduction in the treatment times, maintenance visits, and costs along with high patient satisfaction with these newer CRDPs would be added advantages when treating the elderly edentates.


Recruitment information / eligibility

Status Completed
Enrollment 15
Est. completion date March 1, 2020
Est. primary completion date September 15, 2019
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group N/A and older
Eligibility Inclusion Criteria: - patient of undergraduate student at the University clinics of dental medicine Geneva - completely edentulous - requesting novel complete dentures Exclusion Criteria: - not willing to sign informed consent

Study Design


Related Conditions & MeSH terms


Intervention

Device:
manufacturing a complete dental prosthesis
dental treatment to replace missing teeth

Locations

Country Name City State
Switzerland University clinics of dental medicine Genève Geneva 4

Sponsors (1)

Lead Sponsor Collaborator
University of Geneva, Switzerland

Country where clinical trial is conducted

Switzerland, 

Outcome

Type Measure Description Time frame Safety issue
Primary Trueness of intaglio surface fit of the dental prosthesis as evaluated by superimposition of scanned intaglio surfaces at baseline and at 6-weeks Change from Baseline intaglio surface at 6-weeks
Secondary Clinician's denture quality denture quality questionnaire (Alfadda et al. 2014) Change from Baseline denture retention and stability at 6-weeks
Secondary denture satisfaction Instrument patient's denture satisfaction questionnaire (Allen et al. 2001) Change from Baseline denture satisfaction at 6-weeks
Secondary denture preference the patient will decide which denture he/she prefers to keep after the clinical trial after both dentures have been worn for 6 weeks
Secondary prosthetic maintenance described adjustments and repair of the denture during the observation period at 6 weeks
Secondary willingness to pay open ended contingency valuation method to evaluate the amount the patient would pay for the denture at 6-weeks
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