Tooth Loss
Conditions
Keywords
Cone-Beam computed tomography, the centric relation, the upper airway, mandibular position
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
Interventions
PROCEDUREthe centric relation
All participants were recorded the centric relation registrations according to the technique of the gothic tracing method and the neuromuscular method separately.
Sponsors
Fujian Medical University
Study design
Allocation
RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
SINGLE (Subject)
Eligibility
Sex/Gender
ALL
Age
20 Years to 60 Years
Healthy volunteers
Yes
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.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 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
| Measure | Time frame | Description |
|---|---|---|
| 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 |
Other
| Measure | Time frame | Description |
|---|---|---|
| the mandibular position | immediately | 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. |
Countries
China
Outcome results
None listed