Objective: To investigate the effects of tooth extraction on dental arch width and alveolar bonewidth.
目的:研究拔牙矫治对牙弓宽度和基骨宽度的影响。
2
Conclusion (1) Insufficient basal bonewidth 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。
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Results: After treatment, in maxilla the arch width and alveolar bonewidth between canines were in creased(P<0.01), those were decreased between second premolars(P<0.01 ).