Growth Modification
Conditions
Keywords
twin block, esthetic twin block, clear twin block, Deficient mandible, Skeletal Class II
Brief summary
The aim of the current study is to evaluate the skeletal, dental, soft tissue, TMJ, and upper airway size changes associated with a new design of twin block compared to the conventional twin block appliance. Additionally, patients' satisfaction with the two designs will be assessed.
Detailed description
Twin block appliance is the gold standard for the treatment of skeletal class II patients with deficient mandible. Yet, it has some drawbacks as proclination of the mandibular incisors, development of posterior open bite and the unesthetic appearance. Many modifications in twin block A new design were made to overcome the previous problems, as adding incisor capping, Clasps, sagittal blocks, and esthetic twin block appliances. In the current trial A new design of esthetic twin block appliance with sagittal blocks is investigated and the post treatment skeletal, dental, and soft tissue, TMJ, and upper airway size will be assessed and compared to the changes associated with the conventional design of twin block. Moreover, patient satisfaction with the appliance will be assessed with both appliances.
Interventions
OTHERmodified design of twin block
Vacuum formed twin block appliance with sagittal blocks
Sponsors
Cairo University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Eligibility
Sex/Gender
MALE
Age
10 Years to 14 Years
Healthy volunteers
Yes
Inclusion criteria
* skeletal class II deficient mandible * Class II molar and canine relation * male growing patients CVM 2,3 age range 10-14 * normal vertical growth pattern * ANB \> 4 * mild to moderate crowding
Exclusion criteria
* Previous orthodontic treatment. * Craniofacial syndrome. * Periodontal disease. * Extracted first permanent molars.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| skeletal changes | 9 months | changes in SNA, SNB, and ANB angles will be measured before and after treatment |
| Dental changes | 9 months | changes in maxillary and mandibular incisors position and inclination will be assessed before and after treatment |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| soft tissue changes | 9 months | changes in soft tissue A, B, Pog points will be assessed before and after treatment |
| JMJ changes | 9 months | changes in the TMJ morphologic structure will be assessed before and after treatment |
| Upper airway size | 9 months | changes in the Upper airway size will be assessed before and after treatment |
| patient satisfaction | after one and nine months | patients acceptance of the appliance will be assessed by a questionnaire administered in one to one interview. |
Outcome results
None listed