AzTrials
AzTrials

Prosthetic TreatmentNCT06982898

Digitalization of Maxillo-mandibular Relation for Arches With Occlusal Support Loss

A study testing Fixed prosthesis with bimanual CR and intraoral scan in people with Prosthetic Treatment and Occlusal Analysis, run by Kıvanç Akça at 1 site in Turkey (Türkiye).

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

Accurate recording of the intermaxillary relationship is crucial for achieving successful restorative outcomes. In cases of occlusal support loss, determining and recording the intermaxillary relationship becomes more complex. Read more about this study

Who is it for?
Ages 18 to 65 yearsHealthy volunteers can take part
What is being tested?
Fixed prosthesis with bimanual CR and intraoral scan
Type of treatment
Surgery or procedure
Could I receive a placebo?
No, everyone receives an active treatment
How many people
13 participants
Where
1 siteTurkey (Türkiye)
Study dates
1 May 2025to 30 Aug 2025
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 18 to 65 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Voluntary participation after reading and understanding the informed consent form.
  • Age between 18 and 65 years with completed growth and development.
  • Healthy dental and periodontal condition.
  • Presence of bilateral edentulism in the maxillary posterior region leading to occlusal support loss, requiring fixed prosthetic treatment.
  • Fixed dentition present in the mandible.

Who cannot join

  • Refusal to voluntarily participate after reading the informed consent form.
  • General health condition unsuitable for prosthetic treatment.
  • Use of removable prostheses in the mandibular arch.
  • Presence of temporomandibular joint dysfunction, orofacial pain, or acute oral disease.

Trial locations and contacts

1 site in 1 country.

Turkey (Türkiye)1 site
  • Hacettepe University, Faculty of Dentistry

    Ankara, 0623

Other trials in Turkey (Türkiye)

About this study

Official title: Restorative Comparison of Facebow and Simplified Techniques for Digital Jaw Relation Records in Treatment of Occlusal Rehabilitation

Accurate recording of the intermaxillary relationship is crucial for achieving successful restorative outcomes.

In cases of occlusal support loss, determining and recording the intermaxillary relationship becomes more complex.

This study aims to compare the occlusal compatibility of restorations fabricated using either an intraoral scanner or a jaw motion tracking and analysis device for recording the intermaxillary relationship in patients with occlusal support loss.

Read the detailed description

This study is designed to fabricate bilateral fixed prosthetic restorations in the maxillary posterior region and to evaluate the clinical success, efficiency, and patient satisfaction associated with different intermaxillary relationship recording methods.

The study will compare the clinical outcomes of restorations produced using two techniques:

Group I: Centric relation (CR) determined by bimanual manipulation and recorded with an intraoral scanner.

Group II: Centric relation (CR) determined by neuromuscular deprogramming and recorded with a jaw movement/tracking analysis device.

All tooth preparations will follow standard preparation principles, ensuring minimum material thickness. Preparations will be completed by the investigator (ESK). After preparation, intraoral scans of the upper and lower jaws will be obtained using an intraoral scanner.

Centric relation will be recorded first with bimanual manipulation stabilized with wax, then digitized via intraoral scanning. In a subsequent session, centric relation will be recorded using a neuromuscular deprogrammer and jaw movement tracking analysis.

Both recordings will be sent to a dental laboratory for the fabrication of restorations. A randomization protocol will be applied to vary the adjustment order of the restorations fabricated by each method.

During clinical evaluation:

Distal and mesial proximal contacts will be checked and adjusted as needed.

Internal fit will be evaluated and corrected if necessary.

Occlusal adjustment will be performed using 100 µm and 40 µm articulation papers (Arti-Check micro-thin, Bausch, Cologne, Germany).

After occlusal adjustment:

The adjusted surfaces will be colored, photographed, and measured using ImageJ software to determine the adjusted surface area (in mm²).

Adjustment time and number of articulation paper applications will also be recorded.

These clinical parameters (adjusted area, adjustment time, and number of papers used) will be scored to assess the clinical success of the restorations.

Additionally, patient-reported outcomes will be collected:

Occlusal comfort and technique preference will be evaluated via a Visual Analog Scale (VAS, 0 = complete dissatisfaction, 10 = complete satisfaction) and a method preference survey.

This evaluation aims to determine which technique offers better patient comfort and overall satisfaction.

Being tested
Fixed prosthesis with bimanual CR and intraoral scan
Keywords
jaw relation, digital dentistry

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Fixed prosthesis with bimanual CR and intraoral scanProcedure or surgery

    Also called Fixed prosthesis with neuromuscular CR and jaw tracking

    Tooth-supported fixed prostheses were fabricated using centric relation records obtained by two different methods:

    1. Bimanual manipulation technique, with jaw relation records captured using an intraoral scanner.
    2. Neuromuscular deprogramming technique, with jaw relation records obtained using a jaw movement tracking and analysis device.
Study groups in NCT06982898
Study groupRoleWhat they receive
Determination of Intermaxillary Relationship in Patients with Posterior Support LossExperimentalFor each participant, an intraoral scan was initially obtained using the bimanual manipulation method to determine the centric relation. Subsequently, the neuromuscular deprogramming method was applied, and recordings were obtained using a jaw movement tracking and analysis device. During occlusal adjustment of the restorations fabricated based on both recording methods, the following parameters were evaluated: occlusal surface adaptation, adjustment time, and number of articulating paper applications.
Receives: Procedure: Fixed prosthesis with bimanual CR and intraoral scan

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Adjustment Time for Restoration

    The time required to adjust the restoration will be recorded in minutes and scored on a 0-4 scale as follows: 0 (≤1 min), 1 (1-5 min), 2 (5-10 min), 3 (10-15 min), 4 (≥15 min).

    Measured: 1 year

  2. Adjusted Surface Area of the Restoration

    The surface area requiring adjustment will be measured in square millimeters (mm²) using ImageJ software and scored from 0 to 4: 0 (≤1 mm²), 1 (1-6 mm²), 2 (6-10 mm²), 3 (10-15 mm²), 4 (≥15 mm²).

    Measured: 1 year

  3. Number of Articulation Paper Uses

    The number of articulation paper uses will be counted and scored from 0 to 4 as follows: 0 (2-4 uses), 1 (5-7), 2 (8-10), 3 (10-13), 4 (≥14 uses).

    Measured: 1 year

  4. Composite Clinical Success Score of the Restoration

    The clinical success of each restoration will be evaluated using a composite score derived from three parameters:

    Adjustment Time, Adjusted Surface Area,Number of Articulation Paper Uses.

    Each parameter is scored from 0 to 4, yielding a total score between 0 and 12. Based on the total score, restorations will be categorized as follows:

    Excellent (Score 0-1): Restoration has a clinically optimal fit. Occlusal contacts are properly and evenly distributed.

    Successful (Score 2-4): Restoration shows good clinical fit with minor occlusal adjustments.

    Moderate (Score 5-7): Restoration is clinically acceptable with occlusal adjustments.

    Weak (Score 8-10): Restoration has issues in clinical fit and required major occlusal adjustments.

    Unsuccessful (Score 11-12): Clinical fit is unacceptable. Adjustments caused morphological distortion or resulted in occlusal gaps. Restoration must be replaced.

    This composite score will serve as the primary measure of overall clinical success.

    Measured: 1 year

Secondary outcomes (1)
  1. Occlusal Comfort Evaluated Using Visual Analog Scale

    Secondary outcome will assess patient-reported occlusal comfort following the clinical application of the restoration. Occlusal comfort will be measured using a 10-point Visual Analog Scale (VAS), where 0 indicates no comfort and 10 indicates maximum comfort. Patients will rate their experience immediately after the restoration trial.

    Measured: 1 year

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted21 May 2025
  2. Study start1 May 2025
  3. Primary completion10 Jul 2025
  4. Study completion30 Aug 2025

Resources

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
Treatment
Allocation
Not applicable
Intervention model
Single group
Model description
All participants will receive two different prosthetic interventions based on different jaw relation record techniques. The outcomes will be compared within the same individuals.
Masking
None (open label)
Enrolment
13 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06982898
Sponsor's protocol ID
KA-24002
Status last verified
May 2025
First submitted
21 Apr 2025
Last updated
28 Sep 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: IPD will not be shared because the study focuses on clinical and patient reported outcomes that are not structured for external distribution.

Publications

  • Jasz B, Ambrus S, Garay T, Schmidt P, Hermann P, Kormendi S, Jasz M. Different methods of determining centric relation - comparison with a digital mandibular motion analyser. BMC Oral Health. 2024 Mar 18;24(1):345. doi: 10.1186/s12903-024-04131-x.

    PubMed 38500122
  • Manfredini D, Ercoli C, Poggio CE, Carboncini F, Ferrari M. Centric relation-A biological perspective of a technical concept. J Oral Rehabil. 2023 Nov;50(11):1355-1361. doi: 10.1111/joor.13553. Epub 2023 Jul 11.

    PubMed 37394665
  • Revilla-Leon M, Fernandez-Estevan L, Barmak AB, Kois JC, Perez-Barquero JA. Accuracy of the maxillomandibular relationship at centric relation position recorded by using 3 different intraoral scanners with or without an optical jaw tracking system: An in vivo pilot study. J Dent. 2023 May;132:104478. doi: 10.1016/j.jdent.2023.104478. Epub 2023 Mar 6.

    PubMed 36889536
  • Revilla-Leon M, Zeitler JM, Kois DE, Kois JC. Utilizing an additively manufactured Kois deprogrammer to record centric relation: A simplified workflow and delivery technique. J Prosthet Dent. 2024 Jul;132(1):20-25. doi: 10.1016/j.prosdent.2022.04.034. Epub 2022 Aug 5.

    PubMed 35934572
  • Radu M, Radu D, Abboud M. Digital recording of a conventionally determined centric relation: A technique using an intraoral scanner. J Prosthet Dent. 2020 Feb;123(2):228-231. doi: 10.1016/j.prosdent.2018.12.004. Epub 2019 May 16.

    PubMed 31104810
  • Abdulateef S, Edher F, Hannam AG, Tobias DL, Wyatt CCL. Clinical accuracy and reproducibility of virtual interocclusal records. J Prosthet Dent. 2020 Dec;124(6):667-673. doi: 10.1016/j.prosdent.2019.11.014. Epub 2020 Feb 1.

    PubMed 32014284
  • Kordass B, Gartner C, Sohnel A, Bisler A, Voss G, Bockholt U, Seipel S. The virtual articulator in dentistry: concept and development. Dent Clin North Am. 2002 Jul;46(3):493-506, vi. doi: 10.1016/s0011-8532(02)00006-x.

    PubMed 12222093
  • Kattadiyil MT, Alzaid AA, Campbell SD. What Materials and Reproducible Techniques May Be Used in Recording Centric Relation? Best Evidence Consensus Statement. J Prosthodont. 2021 Apr;30(S1):34-42. doi: 10.1111/jopr.13321.

    PubMed 33783085

Questions about this trial

What is this clinical trial studying?

A study testing Fixed prosthesis with bimanual CR and intraoral scan in people with Prosthetic Treatment and Occlusal Analysis, run by Kıvanç Akça at 1 site in Turkey (Türkiye).

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 5 inclusion and 4 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 28 Sep 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 Turkey (Türkiye). 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?

Adjustment Time for Restoration (time frame: 1 year). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06982898, which also lists 8 linked publications.

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 28 Sep 2026.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in