da Silva Filho O G, Montes L A, Torelly L F
Hospital de Pesquisa e Reabilitaçäo de Lesöes Lábio-Palatais (HPRLLP), University of Säo Paulo, Bauru-SP, Brazil.
Am J Orthod Dentofacial Orthop. 1995 Mar;107(3):268-75. doi: 10.1016/s0889-5406(95)70142-7.
There is an agreement among orthodontists that a posterior crossbite relationship should be treated early. The Haas expansion appliance is frequently chosen whenever a maxillary skeletal constriction exists in the deciduous, mixed, or permanent dentition. In this study we evaluated the efficacy of rapid maxillary expansion for 32 children between 5 and 11 years of age, by inspection of anteroposterior radiographs. Our results confirm previous data in the literature that the triangular opening in the frontal alveolar area is greater than in other parts of the midpalatal suture. It is evident that with expansion there is a real orthodontic effect, even at an early age.
正畸医生们一致认为，后牙反咬合关系应尽早治疗。每当乳牙列、混合牙列或恒牙列存在上颌骨狭窄时，哈斯扩弓矫治器常常被选用。在本研究中，我们通过检查前后位X线片，评估了32名5至11岁儿童快速上颌扩弓的疗效。我们的结果证实了文献中先前的数据，即牙槽嵴前部区域的三角形开口大于腭中缝的其他部位。很明显，即使在早期，扩弓也会产生真正的正畸效果。
