It’s C. You add the things together and divide by 4
Answer:
Retainers have been designed to be used as an end of treatment to help retain your teeth in their new position. ... These are removable and fixed retainers. The reason why retainers can't be used to close a gap is because they are fitted at the end of treatment and are made to fit the straight teeth mould.
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itz by Riddhi
Answer:
the answer is D
Step-by-step explanation:
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