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ePaper created 2018-02-16, 11:06:18 | version 1.38.0
case report _ full mouth reconstruction Fig. 9 Fig. 10 Fig. 11 Fig. 12 (Fig. 13), impression posts were inserted (Fig. 14) and full arch impressions captured for use by the laboratory in fabricating the final crown restorations and custom abutments. The labo- ratory was able to scan the impressions, use digital file splitting to simultaneously design the custom abutments and crowns, and then precisely mill each component to the required Fig. 9_Virtual plan of Zenostar restorations. Fig. 10_Milled restorations on Stratos 100 articulator from Ivoclar Vivadent. Fig. 11_Seated maxillary and mandibular restorations on teeth. Fig. 12_Extended healing caps on implants creating an emergence profile. Fig. 13 3_2017 21 zirconia block(s) were selected and milled. Af- ter milling, minor adjustments were made while the restorations were in the green state, using only grinding instruments. Little or no pressure was applied during this process, but water was used to prevent excessive frictional heat from fracturing the zirconia. The internal aspects of the restorations were sandblasted with 50 μm alumina at 50 psi to enhance adhesion and ce- mentation, after which contaminants were re- moved using steam or ultrasonic cleaning for 15 minutes. Zirconia surfaces must be free of dirt, milling dust/residue, and oily-greasy elements. After the restorations’ surfaces were cleaned, they were sintered appropriately, and then any characterisation with stains and glazes was per- formed. The restorations were hand polished, evaluated (Fig. 10), and returned to the dentist for cementation (Fig. 11). Abutments and remaining crown restorations Four months later, the healing caps were remo- ved from the implants in the #4 and #13 areas (Fig. 12) and ISQ values tested using the Osstell unit. Since the readings were very favourable Fig. 13_Capturing an ISQ reading with Osstell.