Malocclusion, Angle Class II, Retrognathism, TMJ
Conditions
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
Interventions
DEVICEActivator
This appliance is constructed in one piece to guide the position of the mandible on closure
DEVICETwin Block
This appliance is constructed in two pieces to guide the position of the mandible on closure
Sponsors
Damascus University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
10 Years to 13 Years
Healthy volunteers
No
Inclusion criteria
Class II malocclusion Skeletal class II with retruded mandibles. Old between 10-13 years Healthy TMJ Horizontal or normal growth pattern
Exclusion criteria
Patients who have been treated previously Patients with syndromes or congenital deformities Signs or symptoms of temporomandibular disorders.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 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 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 images |
| 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 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 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 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 images |
| 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 images |
| Change 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 images |
| Change 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 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)) |
Countries
Syria
Outcome results
None listed