作者: Van A. Harberson , David R. Myers
DOI: 10.1016/0002-9416(78)90207-5
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摘要: Abstract The purpose of this study was to determine whether opening the midpalatal suture occurs during treatment posterior cross-bites by means a Porter or W appliance. In eight ten cases treated there radiographic evidence opening. Posterior cross-bite correction with appliance may occur either combination and buccal tipping teeth alone.