Pre and post treatment arch width was measured.
比较治疗前后牙弓宽度变化。
Not all of dental arch width and length will relapse after retention.
经治疗和保持后，上下牙弓宽度和长度并非一定会复发。
Conclusions: RE expanded anterior arch width especially the distance of mid-anterior.
结论：RE主要增加前段牙弓宽度，以中切牙间距离最明显。
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: the dis-coordination of the dental arch width in maxilla and mandible has an affinity with periodontal disease.
结论：上、下牙弓宽度不调与牙周病有密切关系。
Objective The objective of the study is to obtain the data of the arch width of the children in Zhenghe, Fujian, and to know the development regularity and characteristics of the growth of the tooth.
目的 了解福建省北部地区政和县儿童牙弓宽度，为研究当地儿童牙弓宽度生长发育的规律和特点提供依据。
Objective The objective of the study is to obtain the data of the arch width of the children in Zhenghe, Fujian, and to know the development regularity and characteristics of the growth of the tooth.
目的 了解福建省北部地区政和县儿童牙弓宽度，为研究当地儿童牙弓宽度生长发育的规律和特点提供依据。
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