Effect of Modified Twin Block in Skeletal Class II Growing Females With Mandibular Deficiency

Cairo University (CU)

Status: Unknown

Conditions: Class II Division 1 Malocclusion

Treatments: Device: modified twin block appliance; Device: twin block appliance

Study type: Interventional

Funder types: Other

Identifiers

NCT03635463

CEBD-CU-2018-08-05

Details and patient eligibility

About

The aim of this study is to evaluate the treatment effects of conventional twin block appliance versus modified twin block appliance in the treatment of patients in growing stage having skeletal class II division 1 with mandibular deficiency.

Full description

in this randomized controlled trail there are 2 groups , the first group will receive modified twin block appliance ,in the second group will receive conventional twin block appliance . the follow up period will be 9 months till mandibular growth occur . the assessment will be through a questionnaire on the number of hours the appliance is worn each day , and another questionnaire assessing the difficulty of speech and aesthetics . Also by, photographs, x-rays and study models preoperative and post operative.

Enrollment: 30 estimated patients

Sex: Female

Ages: 9 to 12 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

1. Skeletal Class II relationship (ANB > 4°).
2. Mandibular retrognathy (SNB < 78°).
3. Overjet ≥ 5 mm.
4. Minimal crowding in dental arches (≤4 mm).
5. Class II molar relation.
6. Growing female patients.
7. Patients with CMV3 maturation stage of the cervical verbrae.

Exclusion criteria

1. No history of orthodontic treatment either prior to or during functional Appliance therapy.
2. Posterior cross bites or severe maxillary transverse deficiency.
3. Severe facial asymmetry determined by clinical or radiographical examination.
4. Poor oral hygiene.
5. Systemic diseases that may affect the orthodontic treatment results.
6. Patients past their peak growth spurt.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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30 participants in 2 patient groups

twin block appliance

Experimental group

Description:

this group will receive conventional twin block appliance and followed up every month for 9 months.

Treatment:

Device: twin block appliance

modified twin block appliance group

Experimental group

Description:

modified twin block appliance group , this group will receive the modified appliance and followed up every month for 9 months

Treatment:

Device: modified twin block appliance