Fig. 6 Fig. 9 Fig. 10 Fig. 7 Fig. 8 erupted first bicuspid just because it is easier to get a forcep on this tooth when extraction of the impacted, poorly developed, short rooted, or slow erupted second bicuspid could be extracted. This can shorten the treatment time considerably simply by creating a fully erupted dention to work on. In Fig. 6, you can find a summary of mechanics for cuspid extraction cases. Fig. 7, is an example of a case were the upper 3’s and lower 4’s were extracted. In this case, the treatment time was 14 months. Note: If there were attached gingival problems on the lower cuspids due to them erupting into mucosa all four of the cuspids would have been extracted. Fig. 11 And how about Figs. 8-11, in this case there were no impacted teeth, but the maxillary sinus was so low and anteriorly extending that extraction of the upper cuspids was 34 Summer 2019 JAOS
Journal of the American Orthodontic Society Summer 2019: Page 34
