Correlation analysis of the nasolabial angle of Angle’s Class Ⅱ division 1 malocclusion patients with vertical growth pattern after tooth extraction orthodontic treatment
Peng Minghui, Kang Jing, Zhou Jianming, Du Bing
West China Journal of Stomatology . 2015, (4): 397 -400 .  DOI: 10.7518/hxkq.2015.04.015

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