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CAD/CAM International magazineof digital dentistry No. 1, 2017

| cone beam supplement use of CBCT and CAD/CAM Fig. 23: Palatal view of functional telescopic crowns and exposed implants. Fig. 24: Telescopic denture of skeletal type enables the patient to function comfortably during the transitory period. It also enables checking the aesthetics and functionality before the final screw-based restoration is finished. Fig. 23 Fig. 24 A temporary skeletal prosthesis, based on four tel- escopes, shall be placed on such a foundation (Figs. 16 & 17). Primary telescopic crowns were glued last (Fig. 18). Secondary telescopic crowns, made from acetal by means of the CAD/CAM virtual designing method, were tried on primary crowns (Fig. 19). Figures from 20 to 22 present a macroscopic view of zirconia pri- mary crowns testing and acetal secondary crowns. At that stage, our patient received a temporary prosthesis, while lateral implants remained un- loaded (Figs. 23 & 24). In the second part of the article, we will present the designing process (Figs. 25 and 26) along with the process of manufacture of the final construction made from TRINIA material with glued zirconia crowns as well as veneering by means of pink com- posite material._ Work completed in cooperation with Inter-Dent laboratory in Warsaw, Poland. Editorial note: This article is the first one from the two parts series. Part II will appear in CAD/CAM 2/2017. contact Dr Tomasz Śmigiel graduated from Silesian Medical University in 1997. Author of multiple publications for specialist magazines about dentistry and a lecturer at numerous congresses. In 2012 he was certified with the title of a Master of Science in Oral Implantology at the J.W. Goethe- University in Frankfurt/Main, where he conduct- ed research on an innovative system of synthetic tele- scopes. He is also the co-founder and a board member of Implant Masters Poland, a non-profit association. He can be contacted at tomasz@smigiel.net Fig. 25 Fig. 26 Fig. 25: Design of the final restoration. Fig. 26: Scan of the temporary prosthesis (in blue) to visualise the space needed to make porcelain crowns. The model was scanned while the abutments were made ready in such a way that they could serve as telescopic crowns, also in the final stage (Fig. 9). Primary and secondary telescopic crowns were designed on the abutments (Figs. 10 & 11) on the assumption that secondary crowns had been made ready twice, that is, for the sake of temporary pros- thesis and at the same time for gluing it into the final construction (Figs. 12 & 13). Abutments were mounted on implants by means of Pattern Resin (Figs. 14 & 15) in such a way that the position does not change during mounting. 48 CAD/CAM 1 2017

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