Huddart A G
Stomatol DDR. 1979 Dec;29(12):897-904.
The study analyses the changes occurring in the maxillary arches of 30 infants with complete unilateral clefts of the lip and palate following presurgical maxillary orthopaedic treatment. 15 similar cases not receiving such treatment were used as controls together with 30 normal subjects. Photocopies of models of the arches at birth and 4 months were analyzed by computer and the area of palatel tissue measured using stereophotogrammetry. In the presurgical cases, the palatal cleft was significantly narrowed due to the transverse and antero-posterior dimensions of the arches increasing less than in the controls. The narrowing of the cleft was particularly marked in the alveolar region because the presurgical treatment minimised the antero-lateral (outward) rotation of the lesser segment which otherwise would have occurred. Somewhat surprisingly, the study showed that presurgical treatment tended to inhibit growth of palatal tissue and it was concluded therefore that the narrowing of the defect was due mainly to the growth pattern of the maxillary arch being modified by the appliances.
该研究分析了30例唇腭裂完全性单侧腭裂婴儿在术前上颌骨正畸治疗后上颌牙弓发生的变化。15例未接受此类治疗的类似病例与30例正常受试者一起作为对照。通过计算机分析出生时和4个月时牙弓模型的复印件，并使用立体摄影测量法测量腭组织的面积。在术前病例中，由于牙弓的横向和前后尺寸增加幅度小于对照组，腭裂明显变窄。腭裂的变窄在牙槽区域尤为明显，因为术前治疗最大限度地减少了较小节段的前外侧（向外）旋转，否则这种旋转将会发生。有点令人惊讶的是，该研究表明术前治疗往往会抑制腭组织的生长，因此得出结论，缺损的变窄主要是由于矫治器改变了上颌牙弓的生长模式。
