下颌第一前磨牙拔除对第三磨牙间隙的影响。
The effect of mandibular first premolar extraction on third molar space.
作者信息
Richardson M E
机构信息
Orthodontic Department, School of Dentistry, Royal Victoria Hospital, Belfast, Northern Ireland.
出版信息
Angle Orthod. 1989 Winter;59(4):291-4. doi: 10.1043/0003-3219(1989)059<0291:TEOMFP>2.0.CO;2.
Abstract
Change in molar space is compared in 48 mandibular first premolar extraction cases and 46 non-extraction cases over a five year period. Significantly greater increase in molar space is found in extraction cases. It is, to some extent, related to the initial degree of crowding.
摘要
在48例下颌第一前磨牙拔除病例和46例非拔牙病例中，比较了五年期间磨牙间隙的变化。发现拔牙病例中磨牙间隙的增加明显更大。这在一定程度上与初始拥挤程度有关。
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