question: Which of the following is not an indication of the facemask:
opa: It can be used for bending the condylar neck for stimulating TMJ adaptations to posterior displacement of the chin.
opb: It can be used for space maintenance.
opc: It can be used for selective rearrangement of the palatal shelves in the cleft patients.
opd: It aids in pulling the maxillary structures forward.