Richardson ME. The effect of mandibular first premolar extraction on third molar space.
Angle Orthod 1990;
59:291-4. [PMID:
2596751 DOI:
10.1043/0003-3219(1989)059<0291:teomfp>2.0.co;2]
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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.
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