Fixed prosthesis with bimanual CR and intraoral scan
Fixed prosthesis with bimanual CR and intraoral scan: 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 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.
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.
Eligibility
Sex
ALL
Min age
18 Years
Max age
65 Years
Healthy volunteers
Accepted
Inclusion Criteria:
* 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.
Exclusion Criteria:
* 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.
Primary outcome measure(s)
Adjustment Time for Restoration — 1 year 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).
Adjusted Surface Area of the Restoration — 1 year 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).
Number of Articulation Paper Uses — 1 year 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).
Composite Clinical Success Score of the Restoration — 1 year 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.
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
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