Comparison of the Centric Relation Recorded by Two Methods Using Cone Beam Computed Tomography

Not Applicable

Completed

• Conditions: Tooth Loss
• Interventions: Procedure: the centric relation

• Registration Number: NCT05512442
• Lead Sponsor: Fujian Medical University

Brief Summary

The purpose of this study was to investigate and compare the variation in mandibular relation recorded by the gothic arch methods and the K7 method using cone beam computed tomography (CBCT)

Detailed Description

ten asymptomatic participants were selected,the centric relation registrations were separately recorded according to the technique of the gothic arch method and the neuromuscular method,subsequent, they were instructed to perform CBCT wearing two bite registrations,thus using dophin software to calculate the tmj space and the upper airway and using exocad software to ananyse the mandibular position, Data were analysed with paired t-test

Study Timeline

• Study Start: 2020-01-01
• Primary Completion: 2021-03-01
• Study Completion: 2021-04-01
• Status Verified: 2022-08
• Study First Submitted: 2022-08-22
• Study First Submitted QC: 2022-08-22
• Last Update Submitted: 2022-08-22
• Study First Posted: 2022-08-23
• Last Update Posted: 2022-08-23

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 10

Inclusion Criteria

absence of the mandibular position Classified as ASA 1 or 2 (normal healthy patient or with mild systemic disease, according to the American Society of Anaesthesiologists Physical Status Classification System); Absence of the symptoms and signs of the temporomandibular joint; Willing to participate and to sign a written informed consent form.

Exclusion Criteria

Cardiac pacemaker carriers and pregnant women; people with heart pace disorders and epilepsy; Temporomandibular or craniocervical disorders.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
record the centric relation using the neuromuscular method	the centric relation	the participant were subjected to a low-frequency transcutaneous electrical nerve stimulation (TENS) using the J5 Myotronics for 45 minutes,With the help of TENS, complete relaxation of the muscles were achieved and the mandibular musculature was induced to guide the mandible in the physiologic position,thus using K7 to track the physical mandibular positon which was defined as the neuromuscular position.
record the centric relation using the gothic tracing method	the centric relation	the vertical dimension of occlusion (VDO) were were determineded through facial appearance observation,thus,the patients were trained to execute bordering protrusive, retrusive and bilateral lateral-protrusive movements wearing the intraoral apparatus and a Gothic Arch Tracing was made, the apex of the Gothic Arch Tracing was defined as the gothic arch position.

Primary Outcome Measures

Name	Time	Method
the temporomandibular joint space	immediately	according to the method of Ikeda and Kawamura, tmj space measurement in sagittal of the CBCT images were performed

Secondary Outcome Measures

Name	Time	Method
the upper airway	immediately	Using the sinus/airway feature of the Dolphin software to reconstruct the upper airway,it included three region: the nasopharynx, oropharynx, and hypopharynx

Trial Locations

Locations (1)

Fujian Medical University; 🇨🇳 Fuzhou, Fujian, China