Fig. 19 Fig. 21 Fig. 22 Fig. 23 Fig. 20 Post Treatment Analyzing the provisional crowns critically, the labial gingival ridge lap on crown #10 is too long (Fig. 18). However, the patient’s smile line is low-normal (Fig. 19), so the excessive labial gingival length on crown #10 was of no consequence to him. He was happy to have fixed restorations. Other Fixed-Crown Provisional Options Another crown option over a TAD abutment is to fabricate a composite crown. The 3M Unitek TAD design above the square head is similar to the 3M MDI Standard O-Ball and Collar mini implant design (Fig. 20). 1 The O-ball temporization cap (Figs. 21A and B) 1 fits (snaps onto) both the 3M Unitek TAD as well as the 3M MDI Standard O-Ball and Collar mini implant. Snap the MDI O-Ball immediate temporization cap onto a TAD that has been placed in the mouth. Select an appropriately trimmed strip-off crown form (Fig. 21C), fill it with composite and place it over the temporization cap, remove the excess extruded composite, and light cure. The finished composite crown is shown in Fig. 22. The dentist may or may not cement the provisional composite crown onto the TAD as it will snap onto the TAD if left unce-mented. My preference would be to cement the provi-sional composite crown onto the TAD. The dentist may opt to use a mini implant as a provi-sional abutment in lieu of a TAD for additional length 36 Fall 2017 JAOS
Journal of the American Orthodontic Society Fall 2017: Page 36
