These are the appliances, which are utilised in Phase 1 treatment. They include plates, functional appliances, headgear, expansion springs, expansion plates face masks and many more.

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The purpose of these appliances also known as orthopaedic appliances is to enhance or modify the growth and development of the face and jaws, allowing more harmonious dental and skeletal growth which results in an improvement in facial aesthetics and dental function.
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These are usually removable appliances which, when used efficiently, seek to reduce Phase II treatment time or even exclude it entirely.