Three-Dimensional Assessment of Dentoskeletal Changes Associated With a Modified Twin Block Appliance

Cairo University (CU)

Status: Not yet enrolling

Conditions: Growth Modification

Treatments: Other: modified design of twin block

Study type: Interventional

Funder types: Other

Identifiers

NCT06589206

3444

Details and patient eligibility

About

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.

Full 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.

Enrollment: 30 estimated patients

Sex: Male

Ages: 10 to 14 years old

Volunteers: Accepts Healthy Volunteers

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.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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30 participants in 2 patient groups

conventional twin block

Active Comparator group

Description:

Growing patients with class II skeletal discrepancy due to mandibular deficiency will be treated with the conventional design of twin block previously introduced by Clark.

Treatment:

Other: modified design of twin block

Vacuum formed twin block appliance with sagittal blocks

Experimental group

Description:

Growing patients with class II skeletal discrepancy due to mandibular deficiency will be treated with a modified design of twin block formed of vacuum sheets with sagittal blocks.

Treatment:

Other: modified design of twin block