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

Fujian Medical University

Status: Completed

Conditions: Tooth Loss

Treatments: Procedure: the centric relation

Study type: Interventional

Funder types: Other

Identifiers

NCT05512442

20200901

Details and patient eligibility

About

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)

Full 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

Enrollment: 10 patients

Sex: All

Ages: 20 to 60 years old

Volunteers: Accepts Healthy Volunteers

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.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Single Group Assignment

Masking: Single Blind

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10 participants in 2 patient groups

record the centric relation using the gothic tracing method

Experimental group

Description:

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.

Treatment:

Procedure: the centric relation

record the centric relation using the neuromuscular method

Experimental group

Description:

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.

Treatment:

Procedure: the centric relation