Cortical bone Width 皮质骨宽度
pin bone width 坐骨结节宽 ; 座骨结节宽
trabecula bone width 骨小梁宽度
alveolar bone width 牙槽骨宽度
basal Bone arch width 基骨弓宽度
width of bone 骨宽度
Objective: To investigate the effects of tooth extraction on dental arch width and alveolar bone width.
目的：研究拔牙矫治对牙弓宽度和基骨宽度的影响。
Conclusion (1) Insufficient basal bone width and excessive tooth size were the main causes of tooth crowding and tooth removing treatment.
结论：1 .基骨宽度不足、牙齿过大是造成牙列拥挤和拔牙矫治的主要原因。
Results: After treatment, in maxilla the arch width and alveolar bone width between canines were in creased(P<0.01), those were decreased between second premolars(P<0.01 ).
结果：上颌矫治后尖牙间牙弓宽度和基骨宽度明显增加（P< 0 .0 1） ，前磨牙间牙弓宽度和基骨宽度明显减小（P< 0 .0 1）。
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