2) 하악 --- 제1대구치 offset 후방의 경사가 상악만큼 설측 경사를 이루지 않으며 제 2대구치 설측 경사도
상악만큼 현저하지 않다.
4. Arch coordination
Location
of offsets and contour of maxillary archwire.
Note flattening
of wire in bicuspid area, first molar offset, and second molar offset
if necessary.
Mandibular arch
form at bracket level.
Maxillary
and mandibular archwire su Perimposed. The solid line represents
the maxillary archwire; the broken line represents the mandibular
arch wire.
Note: Thicker maxillary canine permits separation
in this area. Maxillary bicuspid arch width is considerably wider
than mandibular bicuspids because of occlusion of lingual slope
on cusp of maxillary bicuspid with labial cusps of mandibular bicuspid.
Archwires cross at center of maxillary and distal of mandibular
first molar.