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| interview tissue structures to self-regulate and, where necessary, to heal. If these self-regulatory forces are impaired, no decomposition product (as part of an inflammation) can be eliminated, and rejection occurs. This is my explana- tion for the sudden loss if zircon implants. It is therefore vital to record in advance a detailed assessment con- cerning the inaugurated implantation area. If that has been done, the implant can be placed in a holistically acceptable way. Prof. Becker: My further point with regard to the fo- cus or interference issue is that large-scale extraction wounds usually don’t heal in such a way that they can then be considered focus-free. In the vast majority of cases, residual osteitides (persistent osteitides) remain on these “long stretches”. These then form cavities in the bone that are filled out with connective tissue structures and are therefore “soft”. These then produce substances that are not poisonous, but significantly disturb the me- tabolism of the surrounding bone and do not allow an op- timal supply of this area. If these regions are later treated with implants, those implants find no stability and are soon “rejected”. However, this applies to both, titanium as well as ceramic implants. There is a variety of implant systems available, all based on different technologies, designs and pros- thetic strategies. What is your implant system of choice? Dr Kolbe: I use the new two-component ceramic sys- tem AWI by WITAR GmbH, a company based in Co- logne. AWI is a simple and secure system with three main advantages: it is metal-free, biocompatible and aesthetic. The newly developed and patented two-com- ponent system made of biocompatible Y-TZP-ceramic is not only reliable and stable, but also easy to handle which has, subsequently, a positive effect on keeping costs and treatment time down. The new AWI implant system combines all advantages and proven character- istics of modern ceramic implants with a newly devel- oped, extremely stable and tissue-compatible construc- tion for transgingival healing. In your opinion, what are the main surgical and pros- thetic characteristics that distinguish this new sys- tem from others? DT Artur Wolf: Whether in terms of aesthetics, sta- bility, biocompatibility or osseointegration: AWI is not a replica of an existing system, but a real new develop- ment in all areas with its innovative design. The implant thus has a gap-reduced connecting system with a rotat- able and cementable all-ceramic abutment, a tangen- tial micro thread in the cortical bone area and a trans- gingival shoulder region which provides an ideal surface for the soft tissue and for the aesthetic transition to the prosthetic treatment. For successful osseointegration, it also has an ideal thread roughness of 1.7 µm—this was revealed by a study by the University of Jena on cell colonisation. The surface roughness can therefore be compared to that of leading titanium implants. An- other benefit: The universally usable implant was con- densed to its essential elements. The treatment process is therefore extremely simple, safe and about twice as fast as with other systems. The implants are sealed di- rectly after insertion with a gingiva former as a healing cap. The screwed and cemented ceramic abutment can later be ground and moulded like a natural tooth inside the mouth—for less appointments, costs and treatment time, and more stability and safety. New systems usually lack scientific data, a circum- stance which makes them easily attackable by sceptics. What can you tell us about the system you use in term of its clinical and scientific evidence? Dr Kolbe: The system is, of course, clinically tested, certified and scientifically evaluated. The AWI implant system has proven its reliability in various clinical stud- ies (including at Krasnoyarsk State University in Russia); dynamic and static load tests have shown that, with val- ues of up to 500 N, it withstands more than most other systems made of ceramic or titanium; and its break- ing forces are demonstrably beyond the values of what bones can endure. The AWI system, which is completely manufactured in Germany, therefore provides a clinically protected, compact and cost-effective implant concept which has already been applied successfully more than a thousand times. There is also a one-piece AWI implant for the lower anterior region with a diameter of 3.9 mm and two sizes (10 and 12 mm). The system also contains two straight all-ceramic abutments and two all-ceramic abutments at a 15° angle, a steribox and a surgical tray with fi- bres made of ATZ high-performance ceramic and turn- ing tools. Thank you very much for this conversation. contact WITAR Consulting GmbH Rodenkirchener Straße 148 50997 Cologne, Germany www.witar.de 48 implants 1 2017