Different Manufacturing Techniques of Facial Prostheses

NCT ID: NCT06864091

Last Updated: 2025-03-07

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

5 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-10-01

Study Completion Date

2025-09-30

Brief Summary

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All participants will undergo 3-dimentional facial scan and the defect site will be scanned using intraoral scanner. the data will be extracted in Standard tessellation Language (STL) and used in virtual prosthesis reconstruction.

* (Group 1) involves direct printing of the final prosthesis using biocompatible rubber-like printable soft resin.
* Group 2, involves direct manufacturing of the negative mold, it will be virtually designed based on an inverted STL file of prosthesis prototype/ pattern.
* Group 3, involves fabrication of the negative mold indirectly by printing the prosthesis prototype from resin and then duplicating it into wax and a conventional stone mold will be fabricated.
* The negative molds of both groups 2\&3 will be used in packing medical grade silicone (to cast the final prosthesis.
* All final prostheses will be colored and characterized to match the surrounding anatomy.
* Esthetic outcomes will be assessed using VAS scale by answering operator and patient related questionnaires. The patient related questionnaire will be translated to the patients and responses will be recorded. For each patient, a score will be given from 1-5.
* Prosthesis accuracy will be assessed using Medit software, comparing the scan of the final prosthesis to the STL of the prosthesis design and the root mean square (RMS) will be recorded.

Detailed Description

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Conditions

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Facial Defects

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

OTHER

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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Direct Mould Making

Group Type EXPERIMENTAL

Direct Mould Making

Intervention Type OTHER

In the second intervention (I2), the negative mold will be achieved directly, will be virtually designed based on an inverted STL file of prosthesis prototype/ pattern (direct mold making, DMM).

Indirect Mould Making

Group Type EXPERIMENTAL

Indirect Mould Making

Intervention Type OTHER

the negative mold will be fabricated indirectly by printing the prosthesis prototype from resin for subsequent mold fabrication (indirect mold making, IMM). The printed prototype will be tried on the patient and adjusted in terms of shape, size and marginal fit.

After the try-in stage the prototype will be duplicated into wax by using silicone rubber molding and a conventional stone mold will be fabricated.

Rapid Manufacturing

Group Type EXPERIMENTAL

Rapid Manufacturing

Intervention Type OTHER

The first intervention (I1) involves direct printing of the final prosthesis (rapid manufacturing, RM). The final prosthesis will be printed using a biocompatible rubber-like printable soft resin (Biomed Flex 80A resin, Formlabs, USA), and then will be colored and characterized to match the surrounding anatomy.

Interventions

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Rapid Manufacturing

The first intervention (I1) involves direct printing of the final prosthesis (rapid manufacturing, RM). The final prosthesis will be printed using a biocompatible rubber-like printable soft resin (Biomed Flex 80A resin, Formlabs, USA), and then will be colored and characterized to match the surrounding anatomy.

Intervention Type OTHER

Direct Mould Making

In the second intervention (I2), the negative mold will be achieved directly, will be virtually designed based on an inverted STL file of prosthesis prototype/ pattern (direct mold making, DMM).

Intervention Type OTHER

Indirect Mould Making

the negative mold will be fabricated indirectly by printing the prosthesis prototype from resin for subsequent mold fabrication (indirect mold making, IMM). The printed prototype will be tried on the patient and adjusted in terms of shape, size and marginal fit.

After the try-in stage the prototype will be duplicated into wax by using silicone rubber molding and a conventional stone mold will be fabricated.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

1. Patients with cartilaginous facial defects, i.e: auricular and nasal defects.
2. Patients between 20-60 years old.
3. Post traumatic patients with facial defects.
4. Patients with congenital facial defects.
5. Patients with failed facial surgical construction.
6. Compliant and cooperative patients.

Exclusion Criteria

1 - Patients having risk of tumor recurrence in the defect area. 2- Patients undergoing radiotherapy or chemotherapy treatment. 3- Patients with any debilitating disease. 4- Patients with any type of psychosomatic disorder. 5- Patients with allergy to any of the materials used.
Minimum Eligible Age

20 Years

Maximum Eligible Age

60 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Cairo University

OTHER

Sponsor Role lead

Responsible Party

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Fatima Elmougi

Doctor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Cairo University

Cairo, , Egypt

Site Status RECRUITING

Countries

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Egypt

Central Contacts

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Fatma M Elmougi

Role: CONTACT

+201009242378

Facility Contacts

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Fatma Elmougi

Role: primary

01009242378

Other Identifiers

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1024

Identifier Type: -

Identifier Source: org_study_id

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