Preventive measures are necessary to prevent a potential irregularity from progressing into a more severe malocclusion. The determination of the tooth size-arch length discrepancy in the mixed dentition requires an accurate prediction of the mesiodistal widths of the unerupted permanent teeth.Space analysis during mixed dentition is an important aspect in orthodontic diagnosis and treatment planning. Это и многое другое вы найдете в книге Space analysis in mixed dentition made easier (Suvil Wilson,Vinay Dua and Madhulika Mittar)