I'm very impressed by your contribution to restorative dentistry and adhesive dentistry. Really, whenever you come out with something, I'm following it. So basically, just to conclude, because I get this question a lot, can you bond to old composite? So you can, but you should be scrupulous. So if it's a composite that you know you place, you know the conditions under which the composite was placed, it was placed under ideal conditions and it's intact. And yes, you can bond to old composite, but if it's questionable, you didn't place it, you don't know the conditions. The composite showing signs of aging, the margins aren't intact, there's marginal staining. Perhaps there's undermined by carries, then yes, you should replace it. But the advantage of bonding to old composite when you can is that you can save valuable tooth structure, and it's important to save valuable tooth structure when you can, because the tooth does have this sort of tooth death cycle where every time we intervene on the tooth, we're pushing it down further and further with the tooth death cycle. But the less tooth structure that we can take away, the more that we can preserve.

Yeah, actually, I really like the thing that there is so much interest in biomimetic adhesive dentistry at the moment. So a lot of people like David Alaman and also like the guys here in Holland and myself and a lot of people are interested in teaching, but also in involved in research. And especially we are doing a lot of research on biomimetic dentistry and adhesive dentistry and this actually saves a lot of tooth tissue and this will keep your teeth in for longer duration, because, like you said, if you have like, if you prepare some sound tissue, eventually you have to go for a full crown, which indicates also an anodontic treatment and so on, and eventually you will lose your teeth. So if we are very minimal invasive, we can keep the teeth in longer, and this actually serves the patient, right? So everything we do, I'm not like a rock star, I'm not like, I'm just a healthcare worker and that's what we should also keep in mind. We are not like the big stars or whatsoever. We are just serving the patient in keeping their teeth in for a longer time. And the primary thing, in my opinion, and what works super nice in our clinical studies and why we get this kind of super high survival rates is that we also try to prevent everything. So prevention for me is the basic thing. So it's the most important thing we can do. So, so every time I start my two day hands on course or a live day more or lectures, I always say people, we can restore it the best way we can. But in the end, if you have a super nice beautiful great restoration and the oral hygiene is super bad, your beautiful restoration also mine will not survive. And if we have a very bad restoration, and the oral hygiene is super great, it will survive. And that's the, that's the thing people should be aware of. So for me, making nice reservations, great, but the oral hygiene, that's the thing I would say people really have to make aware that here in Holland, we are doing a lot with hygiene. We have assistants who actually teach our patients on oral hygiene. We have oral hygienists, and they are actually more advanced in teaching oral hygiene to our patients. And because of that, we have those kind of high survival rates too. So it's not only the restorative part and the things we do, but also the older team in our clinic, which actually contributes to those successes of our patients. And I think people have to be, our dentists have to be more aware that I think oral hygiene is one of the biggest part we should proceed and progress and to make it bigger in our

clinic.