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The study is to evaluate the effect of 3D printed modified Twin Block Appliance on skeletal Class II profile correction.
The null hypothesis of this research is that use of 3D Printed Twin Block is not able to induce skeletal rather than dental effects for correction of the skeletal Class II malocclusion in comparison with untreated growing Class II control subjects.
Full description
I- For the treatment group:
A- Medical History Questionnaire will be filled by the patient to exclude the presence of any systemic condition.
B- Clinical Examination:
Proper examination of the oral structures including;
C- Diagnosis:
D- Clinical Procedures:
After taking upper and lower impressions, the impressions are then poured into hard stone that are then digitally scanned using 3D laboratory scanner (3Shape R500 Lab Scanner).
Designing the appliance is done on upper and lower virtual models (using 3Shape Appliance Designer). The appliance covers the upper and lower dental arches with lingual horizontal rectangular attachments to increase the retention.
Buccal triangular ramps for mandibular advancement are designed. They are positioned buccal to the upper and lower posterior segments with a lock to ensure the desired mandibular advancement.
3D printing of the appliance is then done using 3D printer (Dent2-Mogassam) with biocompatible resin material (NextDent Resin OrthoRigid).
Post curing using ultraviolet light for 30min using postcuring unit (Postcuring- Mogassam).
The appliance is then delivered to the patient and instructions are given. Follow up every 4 weeks for 8 months or edge to edge occlusion (the sooner) and then full records taken including Lateral Cephalogram.
II- For the Control group
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Interventional model
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20 participants in 2 patient groups
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Central trial contact
Donia Ezzeldin, Master
Data sourced from clinicaltrials.gov
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