None listed
Conditions
Interventions
Intervention1: Twin block appliance: Myofunctional appliance used for treating skeletal class 2 with retrognathic mandible. Treatment period is 6 to 9 months.
Control Intervention1: NA: NA
Sponsors
Dr. Jyoti Manchanda
Indian Orthodontic Society
Eligibility
Inclusion criteria
Inclusion criteria: Clinically: a) Subject with a full cusp class II or end-on molar relationship bilaterally with convex facial profile. b) Overjet more than 5mm. c) Patients in whom clinical VTO (Visual treatment objective) improves with anterior positioning of mandible. Radiographically: a) A pre-treatment cephalometric analysis with ANB angle more than 4 degrees with favourable functional analysis and favourable growth pattern. b) Subjects who are in accelerated phase of pubertal growth spurt (MP3-FG and MP3-G stage).
Exclusion criteria
Exclusion criteria: a) Subject who had a previous history of any orthodontic treatment b) Missing teeth, Supernumerary teeth, Presence of anterior open bite or cross bite c) Nasal stenosis due to structural problems. d) Severe cognitive or communication impairments e) Currently in speech therapy or any history of speech therapy f) Syndromic or cleft lip and palate cases.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Change in acoustic characteristics of speechTimepoint: T0: Baseline (before initiation of Twin Block appliance therapy) T1: After completion of Twin Block appliance therapy (6 months) T2: 9 months from baseline (T0) | — |
Secondary
| Measure | Time frame |
|---|---|
| Change in craniofacial morphologyTimepoint: T0: Baseline (before treatment) T1: After completion of Twin Block therapy (6 months) T2: 9 months from baseline | — |
Countries
India
Contacts
Public ContactDr Jyoti Manchanda
Govt. Dental College and Hospital, Nagpur
Outcome results
None listed