Status:
COMPLETED
Cephalometric Evaluation of a Clear Mandibular Advancement Appliance Based on the Twin-block Design
Lead Sponsor:
Ain Shams University
Conditions:
Skeletal Malocclusion
Eligibility:
FEMALE
8-12 years
Phase:
NA
Brief Summary
This study evaluates the cephalometric effects of a clear mandibular advancement appliance for the treatment of skeletal class II growing patients suffering from mandibular deficiency.
Detailed Description
A Clear mandibular advancement appliance is constructed comprised of a clear dental splint of 1.5 mm thickness adapted on the patient's teeth. This is followed by the construction of acrylic bite ramp...
Eligibility Criteria
Inclusion
- Gender: Female subjects.
- Chronological age: All recruited subjects were between the ages of 8-12 years.
- Anteroposterior skeletal relationship: Subjects with skeletal Class II malocclusion with normal maxilla and retrognathic mandible were selected. This was confirmed using lateral cephalometric radiographic analysis with the following parameters: decreased effective mandibular length (Co-Gn) according to McNamara composite , SNB\<78, SNA=82+2.
- Dental characteristics:
- Angle Class II molar relationship ranging from edge to edge to full unit Class II.
- Overjet ranging between 5-10 mm.
- Absence of posterior crossbite and/or tendency for posterior crossbite.
- Skeletal maturation stage: The growth stage for all subjects was selected to be before or at the prepubertal growth spurt. This was confirmed by cervical vertebral maturation analysis from the lateral cephalometric radiograph. The cervical vertebrae maturation stage required was Cervical Vertebrae Maturation stage 2-3 according to the cervical vertebrae maturation index by Baccetti et al. allowing sufficient time before the end of the growth spurt.
- No previous history of orthodontic treatment.
- Absence of systemic diseases affecting growth or craniofacial development. -
Exclusion
- \-
Key Trial Info
Start Date :
September 20 2016
Trial Type :
INTERVENTIONAL
Allocation :
ACTUAL
End Date :
March 4 2018
Estimated Enrollment :
20 Patients enrolled
Trial Details
Trial ID
NCT03824574
Start Date
September 20 2016
End Date
March 4 2018
Last Update
January 31 2019
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