Dental Asia Nov/Dec 2018

Behind the Scenes DENTAL ASIA NOVEMBER / DECEMBER 2018 48 Part I: Logical, Feasible and Digital By DMT Karl-Heinz Körholz MDT Karl-Heinz Körholz presents soluƟons with the help of the Full Denture System (FDS) from Amann Girrbach in a two-part arƟcle on a ‘truly uncomfortable’ paƟent case. “O H, SO YOU‘RE ALSO i n t o d i g i t a l f u l l dentures? And I always thought you could not part with your old working habits!” I‘ve heard this comment or, “I always thought you were rather conservative” over and over again in recent years. But of course, one‘s self-perception is quite different. And in reality it is true that for many years I have strictly adhered to a quote by songwriter Wolf Biermann: “Only those who change remain true to themselves.” And since curiosity and the eternal question of “why” is existential in my life, there was no question for me that I should not also be intensively interested in the further development of full dentures. However, I have to admit that for me a newmethod is only a method to be taken seriously if it not merely works on a test set-up, but also prove itself during its ultimate use. This is also the reason for testing a “truly uncomfortable” patient case with the help of the FDS system from Amann Girrbach with the provocative statement: “If it works here, then it really does work.” Digital status For some time now it has been possible to scan plaster models and their assignment and process them digitally. The same applies to hard substances in the mouth, such as teeth, tooth stumps and implants. Nonetheless, I think we will still have to be patient for a while longer until a satisfactory practical method is found to also capture resilient and moving zones digitally, as would be necessary for full dentures. I have no doubt that there will Fig. 1: The two-phase anatomical impression ensures that all regions of the future denture bed are covered and much more. Figs. 2a-b: The impression of the mandible in particular does not suggest being a straightforward case. For this reason, the greatest care must already be taken by the treatment team in the practice at this stage. be solutions here at some point in time. After all, we have achieved so much that is new in digital prosthetics, where five years ago we would simply have shook our heads. The now and today and the more Nevertheless, it is very interesting for me at this point to pose the question: “Where do we stand now, and what can we already achieve today? What makes sense for the laboratory and what are the benefits for the patient?” This series of articles is not about whether a particular system is the best or whether another system is still in its infancy, but about whether and how the FDS system from Amann Girrbach can be integrated into daily practice. The fact that digital full dentures can be implemented with this system and used in everyday routine has already been proven in the past in practical work and specialist articles. But as a dental technician you still dream about “more” and always have a “yes, but” ready for every answer given. That‘s why I dared to select a very awkward patient case that would be very complicated to realise, even by analogue means. I will present this case in several steps and image sequences. Part 1 – All the necessary requirements The initial situation With all currently available systems for digital full dentures, it is currently necessary to more or less perform almost all work steps, from anatomical impression taking to model assembly, using conventional methods. If the models are placed in the movement simulator for the mandible, with or without the use of transfer aids or facebows, relation templates and aesthetic templates, these