Severely Resorbed Mandibular Ridge in Completely Edentulous PatientsNCT07764640
Comparison of Three Final Impression Techniques for Severely Resorbed Mandibular Ridges
A study testing Conventional final impression, Wax impression technique and Compound impression technique in people with Severely Resorbed Mandibular Ridge in Completely Edentulous Patients, run by Tanta University at 1 site in Egypt.
Trial summary
This in vivo crossover study aims to compare the accuracy of three different final impression techniques for severely resorbed mandibular ridges in completely edentulous patients. Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Severely Resorbed Mandibular Ridge in Completely Edentulous Patients
- What is being tested?
- Conventional final impression, Wax impression technique and Compound impression technique
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 8 participants
- Where
- 1 siteEgypt
- Study dates
- 12 Dec 2024to 14 Jun 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Who may be able to join
- -
Who cannot join
- Completely edentulous patients with severely resorbed mandibular ridges.
- Patients requiring a mandibular complete denture.
- Patients able to tolerate the impression procedures and attend the required study visits.
- Patients willing to participate in the study and provide informed consent.
- Patients with systemic or local conditions that contraindicate conventional dental impression procedures.
- Patients with pathological lesions or significant abnormalities affecting the mandibular denture-bearing area.
- Patients unable to tolerate or cooperate with the impression procedures.
- Patients who decline to participate or withdraw their informed consent. -
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Digital Evaluation of the Accuracy of Final Impressions Recorded by Three Different Techniques for Severely Resorbed Complete Mandibular Ridges: An In Vivo Crossover Study
This in vivo crossover study aims to compare the accuracy of three different final impression techniques for severely resorbed mandibular ridges in completely edentulous patients. The accuracy of the impressions will be evaluated digitally using three-dimensional scanning and deviation analysis to determine differences among the impression techniques.
- Being tested
- Conventional final impression, Wax impression technique, Compound impression technique
- Keywords
- Resorbed ridge,digital analysis,final impression,geomagic
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Conventional final impressionProcedure or surgery
Conventional final impression technique using alginate impression material followed by zinc oxide eugenol (ZOE) impression material
Wax impression techniqueProcedure or surgery
Wax impression technique using a wax impression followed by alginate impression material.
Compound impression techniqueProcedure or surgery
Compound impression technique using a low fusing impression compound followed by alginate impression material.
| Study group | Role | What they receive |
|---|---|---|
| Convensional final impression | Experimental | Conventional final impression technique using alginate impression material followed by zinc oxide eugenol (ZOE) impression material. Receives: Procedure: Conventional final impression |
| Wax impression technique | Experimental | Wax impression technique using a wax impression followed by alginate impression material. Receives: Procedure: Wax impression technique |
| compound impression technique | Experimental | Wash compound impression technique using a low-fusing impression compound wash followed by alginate impression material. Receives: Procedure: Compound impression technique |
What is being measured
The primary outcome is the main question the study is designed to answer.
3D deviation (RMS) between final impression scans
The accuracy of the final impression techniques was assessed by three-dimensional deviation analysis of the impression scans using Geomagic Control software. Root Mean Square (RMS) deviation was calculated by comparing the scans obtained using the different impression techniques.
Measured: Immediately after each final impression was recorded
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted14 Aug 2026
- Study start12 Dec 2024
- Primary completion23 May 2025
- Study completion14 Jun 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Severely Resorbed Mandibular Ridge in Completely Edentulous PatientsStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Non-randomised
- Intervention model
- Crossover
- Masking
- None (open label)
- Enrolment
- 8 participants (actual)
Sponsor and investigators
- Lead sponsor
- Tanta University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Nashwa ali saleh, Tanta University
- Investigators
- Nashwa Ali Saleh, PHD, Principal investigator, Tanta University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07764640
- Sponsor's protocol ID
- #R-PR-12-24-3160
- Status last verified
- Aug 2026
- First submitted
- 10 Aug 2026
- Last updated
- 14 Aug 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: Individual participant data will not be shared with other researchers. Only aggregated study results will be reported.
Study at a glance
From the registry record, last updated by the sponsor on 14 Aug 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Digital Evaluation of the Accuracy of Final Impressions Recorded by Three Different Techniques for Severely Resorbed Complete Mandibular Ridges: An In Vivo Crossover Study
- ClinicalTrials.gov ID
- NCT07764640
- Acronym / sponsor ID
- #R-PR-12-24-3160
- Keywords
- Resorbed ridge,digital analysis,final impression,geomagic
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 8 participants (actual)
- Lead sponsor
- Tanta UniversityUniversity, hospital or other
- Study start
- 12 Dec 2024 (actual)
- Primary completion
- 23 May 2025 (actual)
- Study completion
- 14 Jun 2026 (actual)
- First posted
- 14 Aug 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This in vivo crossover study aims to compare the accuracy of three different final impression techniques for severely resorbed mandibular ridges in completely edentulous patients. The accuracy of the impressions will be evaluated digitally using three-dimensional scanning and deviation analysis to determine differences among the impression techniques.
Study design
- Primary purpose
- Other
- Allocation
- Non-randomised
- Intervention model
- Crossover
- Masking
- None (open label)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Convensional final impression | Experimental | Procedure: Conventional final impressionConventional final impression technique using alginate impression material followed by zinc oxide eugenol (ZOE) impression material. |
| Wax impression technique | Experimental | Procedure: Wax impression techniqueWax impression technique using a wax impression followed by alginate impression material. |
| compound impression technique | Experimental | Procedure: Compound impression techniqueWash compound impression technique using a low-fusing impression compound wash followed by alginate impression material. |
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (1 listed)
- -
Key exclusion criteria (8 listed)
- Completely edentulous patients with severely resorbed mandibular ridges.
- Patients requiring a mandibular complete denture.
- Patients able to tolerate the impression procedures and attend the required study visits.
- Patients willing to participate in the study and provide informed consent.
- Patients with systemic or local conditions that contraindicate conventional dental impression procedures.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Conventional final impressionConventional final impression technique using alginate impression material followed by zinc oxide eugenol (ZOE) impression material | Procedure or surgery | Convensional final impression |
| Wax impression techniqueWax impression technique using a wax impression followed by alginate impression material. | Procedure or surgery | Wax impression technique |
| Compound impression techniqueCompound impression technique using a low fusing impression compound followed by alginate impression material. | Procedure or surgery | compound impression technique |
Primary outcome
3D deviation (RMS) between final impression scans
Time frame: Immediately after each final impression was recorded
The accuracy of the final impression techniques was assessed by three-dimensional deviation analysis of the impression scans using Geomagic Control software. Root Mean Square (RMS) deviation was calculated by comparing the scans obtained using the different impression techniques.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 14 Aug 2026.
- Individual participant dataSharing planned: No. Individual participant data will not be shared with other researchers. Only aggregated study results will be reported.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Nashwa Ali Saleh, PHD principal investigator
Tanta University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Conventional final impression, Wax impression technique and Compound impression technique in people with Severely Resorbed Mandibular Ridge in Completely Edentulous Patients, run by Tanta University at 1 site in Egypt.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 14 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Egypt. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
3D deviation (RMS) between final impression scans (time frame: Immediately after each final impression was recorded). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 14 Aug 2026.