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

Comparison of the Centric Relation Recorded by the Gothic Arch Methods and the Neuromuscular Method Using Cone Beam Computed Tomography

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)

Study Overview

• Status: Completed
• Conditions: Tooth Loss
• Intervention / Treatment: Procedure: the centric relation

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 Type: Interventional
• Enrollment (Actual): 10
• Phase: Not Applicable

Contacts and Locations

Study Locations

• China
  • Fujian
    • Fuzhou, Fujian, China, 350004
      • Fujian Medical University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 20 years to 60 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

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 Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Single Group Assignment
• Masking: Single

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: record the centric relation using the gothic tracing method; 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.	Procedure: the centric relation; All participants were recorded the centric relation registrations according to the technique of the gothic tracing method and the neuromuscular method separately.
Experimental: record the centric relation using the neuromuscular method; 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.	Procedure: the centric relation; All participants were recorded the centric relation registrations according to the technique of the gothic tracing method and the neuromuscular method separately.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
the temporomandibular joint space	according to the method of Ikeda and Kawamura, tmj space measurement in sagittal of the CBCT images were performed	immediately

Secondary Outcome Measures

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

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
the mandibular position	convert the DICOM files into the exocad software and analyse the difference of the mandibular position determined by the technique of the gothic tracing method and the neuromuscular method separately.	immediately

Collaborators and Investigators

• Sponsor: Fujian Medical University
• Investigators: Principal Investigator: Hao Yu, Fujian Medical University

Study record dates

Study Major Dates

• Study Start (Actual): January 1, 2020
• Primary Completion (Actual): March 1, 2021
• Study Completion (Actual): April 1, 2021

Study Registration Dates

• First Submitted: August 22, 2022
• First Submitted That Met QC Criteria: August 22, 2022
• First Posted (Actual): August 23, 2022

Study Record Updates

• Last Update Posted (Actual): August 23, 2022
• Last Update Submitted That Met QC Criteria: August 22, 2022
• Last Verified: August 1, 2022

More Information

Terms related to this study

• Keywords: Cone-Beam computed tomography; the centric relation; the upper airway; mandibular position
• Additional Relevant MeSH Terms: Stomatognathic Diseases; Periodontal Diseases; Mouth Diseases; Tooth Diseases; Tooth Loss
• Other Study ID Numbers: 20200901

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: No

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No