The Effect of Functional Treatment of Patients With Backward Positioned Chins on the Jaw Joint and Movements
- Conditions
- RetrognathismTMJMalocclusion, Angle Class II
- Interventions
- Device: ActivatorDevice: Twin Block
- Registration Number
- NCT03645343
- Lead Sponsor
- Damascus University
- Brief Summary
Patients with class II malocclusion and retrognathic mandibles will be treated using functional appliances and asses the remodeling that is expected to occur in the temporomandibular joint (TMJ) using cone-beam computed tomography (CBCT) images and we will register mandibular movements using electronic axiograph ( a specific apparatus used to record jaw movements in three dimensions).
There are three groups :
1. Activator Group
2. Twin block Group
3. Control Group with no treatment.
Patients will be allocated to the three groups randomly.
Data will be collected using three different approaches:
* CBCT images before treatment and 12 months after treatment
* Axiograph registrations before treatment and 12 months after treatment
- Detailed Description
The main purposes of this project are:
1. to evaluate the remodeling effects that would take place in the bone structures of the temporomandibular joint (TMJ) during functional treatment.
2. to evaluate the possible change that may occur in mandibular movements following functional treatment.
3. to evaluate the possible change in the spatial relationship between centric occlusion (CO) and centric relation (CR) following functional treatment
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 66
Class II malocclusion Skeletal class II with retruded mandibles. Old between 10-13 years Healthy TMJ Horizontal or normal growth pattern
Patients who have been treated previously Patients with syndromes or congenital deformities Signs or symptoms of temporomandibular disorders.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Activator Activator Patients will be treated using the Activator appliance for one and a half year Twin Block Twin Block Patients will be treated using the Twin Block appliance for 18 months on average
- Primary Outcome Measures
Name Time Method Change in Articular Eminence Inclination T1: at one day before the commencement of treatment; T2: after 12 months of treatment Articular Eminence inclination: the angle between a horizontal plane and the posterior slope of the articular eminence. This measurement will be done on the 3D software (3D OnDemand) using CBCT images
Change in Condylar Width T1: at one day before the commencement of treatment; T2: after 12 months of treatment Condylar Width: the horizontal width of the head of the condyle. This measurement will be done on the 3D software (3D OnDemand) using CBCT images
Change in Glenoid Fossa Height T1: at one day before the commencement of treatment; T2: after 12 months of treatment Glenoid fossa height: the vertical space between the roof and lowest edge of the fossa.
This measurement will be done on the 3D software (3D OnDemand) using CBCT imagesChange in Condylar Height T1: at one day before the commencement of treatment; T2: after 12 months of treatment Condylar Height: the vertical height of the head of the condyle. This measurement will be done on the 3D software (3D OnDemand) using CBCT images
Change in Glenoid Fossa Width T1: at one day before the commencement of treatment; T2: after 12 months of treatment Glenoid fossa width: the horizontal space between the anterior and posterior wall of the fossa.
This measurement will be done on the 3D software (3D OnDemand) using CBCT imagesChange in Condylar Length T1: at one day before the commencement of treatment; T2: after 12 months of treatment Condylar Length: the mesio-distal length of the head of the condyle. This measurement will be done on the 3D software (3D OnDemand) using CBCT images
Change in Condylar Circumference T1: at one day before the commencement of treatment; T2: after 12 months of treatment Condyle circumference: the outer circumference of the head of the condyle. This measurement will be done on the 3D software (3D OnDemand) using CBCT images
Change in the Anterior Joint Space T1: at one day before the commencement of treatment; T2: after 12 months of treatment Anterior Joint Space: the space between the anterior edge of condyle and the posterior slope of the articular eminence.
This measurement will be done on the 3D software (3D OnDemand) using CBCT imagesChange in the Posterior Joint Space T1: at one day before the commencement of treatment; T2: after 12 months of treatment Posterior joint space: the space between the posterior edge of the condyle and the posterior board of the fossa.
This measurement will be done on the 3D software (3D OnDemand) using CBCT imagesChange in Border Mandibular Movements T1: at one day before the commencement of treatment; T2: after 12 months of treatment Border mandibular movements will be measured on the axiograph apparatus (called Arcosdigma(R)).
Change in the Superior Joint Space T1: at one day before the commencement of treatment; T2: after 12 months of treatment Superior Joint Space: the space between the superior edge of the condyle and the roof of the fossa.
This measurement will be done on the 3D software (3D OnDemand) using CBCT imagesChange in the Discrepancy between CO and CR T1: at one day before the commencement of treatment; T2: after 12 months of treatment CO-CR discrepancy: we will measure distance between centric relation and centric occlusion in three dimensions (sagittal, coronal and axial ). These measurements will be done by an electronic axiograph (Arcosdigma(R))
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Orthodontic Department, University of Damascus Dental School
🇸🇾Damascus, Syrian Arab Republic