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Should our Restorations Follow Textbook Anatomy? Tooth Morphology – PS005

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When restoring molars, should we ALWAYS try to recreate textbook anatomy? (spoiler: NO WAY!) What preventive measures can we use for toothwear? Tooth Morphology in the Real world! In this episode, Emma Hutchison and I explored the nuances of practical tooth morphology. Textbooks provide us with idealized versions of dental structures, but how do these perfect images translate into real-life practice? Can and should we aim to replicate these diagrams exactly in our dental work? https://youtu.be/OcdQRTV7jpY Watch PS005 on Youtube Need to Read it? Check out the Full Episode Transcript below! Highlights of this episode: 1:38 Introducing Emma Hutchison 01:53 First Denture Experience - What is an Overdenture? 03:13 The Importance of Complete Dentures in Aesthetic Dentistry 8:26 Understanding Tooth Morphology in Practice 11:25 Changing the Morphology of the Tooth 15:56 Difference Between Morphology of Premolars 20:31 Preserving Natural Tooth Morphology 27:26 Real-World Application of Tooth Anatomy Don't miss the special notes on tooth morphology available exclusively in the Protrusive Guidance app! This episode is not eligible for CPD/CE points, but never fear, there are hundreds of hours of CPD for Dentists waiting for you on the Protrusive App! For the full educational experience, our Ultimate Education Plan gives you access to all our courses, webinars, and exclusive monthly content. If you love this episode, be sure to recap PS004 - Learning Can Be Stressful! Click below for full episode transcript: Jaz's Introduction: One of the most common questions I get, and also I used to think of, is when we're doing a composite, let's say you're doing it under rubber dam, posterior composite, are you supposed to make the anatomy look like what that tooth is supposed to look like in a textbook? I. e. are you supposed to basically recreate the textbook in the patient's mouth? Jaz's Introduction:Well, do you know what happens when you do that? Well, this is what happens. The patient bites together and you have to rub it all away. You have to adjust all that hard work away and now it looks like a flat white version of amalgam. So what's happening there? How can we be smarter? How can we use the textbook as inspiration but also just not end up making all our restorations flat? It's a real fundamental and basic question in a way but I think it is so real world. So we are covering today tooth morphology with our protrusive student Emma Hutchison. This is PS005. Remember there's a series we're making with Emma throughout the year to cover themes which are relevant to young dentist students and those who are perhaps re engaging back into dentistry. And also for all dentists who just want to dip into the basics again. I think there's a real beauty in seeing how far you've come and how much you've progressed by going through the basics one more time. We were going to talk about orthodontics and stuff but really as a student I thought I wanted to make it more applicable to the real world. So we deviate more towards tooth morphology and I hope that you can apply some of these tips in practice. Or on the mannequins if you're still a student. Remember, if you're a student, you get access to a few secret areas in Protrusive Guidance. All you have to do is send your proof to [email protected] and of course, download Protrusive Guidance app. And then we will link you up to the right space so you get access to a few special features. Let's catch the main episode. I'll catch you in the outro. Main Episode:Welcome back everyone to May's episode. Emma, how is it going? You told me that you just fit your first denture. [Emma]Yeah, so last week I had an elderly gentleman and we needed a new lower over denture. So I've spent the last however many appointments going through all the processes. [Jaz]Emma, for those students who may be a little bit more junior to you, Even though the term over denture might be like a new one and that's strange actually how it's your first denture because we at the dental school, it was complete dentures that we did. So tell us what is an over denture and is that standard for you guys to make an over denture as your first denture? [Emma]I don't think it's pretty standard. So basically my wee patient all of them. He's so nice. He had incisor two on the lower, which we had I had a previous student that had decoronated and we kept the roots in there to sort of give you a bit more bone support and a bit more just support for the denture and that's proved to be really good for him. So you make the denture fit in over these roots and that alveolar bone that you still got a good amount of and that's just made it so much more stable for him. So it really, really worked, worked in his favor. [Jaz]Good. And so this is an acrylic denture, yeah? Acrylic partial denture, and is it just replacing incisors, or are there any molars being replaced as well? [Emma]No, so he had no teeth on the bottom apart from those roots from 2 to 2, yeah. [Jaz]Oh, so it was almost a lower complete denture except just maintaining the four roots. Okay, understood. Now those roots, are they left exposed or have they got like a GIC on them or copings on them? [Emma]They've got a bit of GIC on them, yeah. [Jaz]Okay, fine. I remember doing this in dental school, we did like a metal coping to give the seal basically and that's something that can be done as well. Okay, very interesting. You know with complete dentures, a message for students and for you as well, Emma, is If anyone wants to go into the smile kind of stuff, aesthetic dentistry, cosmetic dentistry, call it what you want. The place to learn it is complete dentures. Because with the teeth and the wax, you can literally set the teeth wherever you want in time and space, right? You can make someone into Bugs Bunny. You can give them a severe overjet. You can give them a deep bite. You just design it how you want. And what you learn from experimenting, okay, what happens when I make my upper and my central sides go higher, further forward, further back? You learn so much about tooth display when they're smiling. So, great place to start learning cosmetic dentistry is actually with complete dentures. Did you know that? [Emma]No, I'd never really thought about it like that, to be fair. No, I haven't really thought about that, but it makes sense. Yeah, definitely. [Jaz]It's an interesting one. I remember going to a lecture, like one or two years qualified, and someone said the percentage of the population that will be needing, like one of those health surveys, like percentage of population that will be needing complete dentures because they'll be fully a edentulous will be something like less than 5%. So the kind of joke he made was, I wouldn't want to specialize in complete dentures. Yet I see like an increase, thanks to social media and people like Rupert and stuff and young dentists get a lot of satisfaction from doing dentures and complete dentures. I think if you gain those removable prosthetic skills. Then I think it's going to make you very employable in the future by any principal, because it's a huge demand and something that not all dentists are keen on. So it's great that you got that first one under your belt. What's the top thing that you learned or a challenge or any reflection that you have in on your experience of delivering this denture? [Emma]In terms of going through the process as a student, I would say, you're making your first denture, you're not going to be able to do it all yourself. I know for the Bite Ridge, I did next to nothing, really, because the clinician had to be there, basically, walked me through it. But what I would say is, don't be prepared to go in and do all of it yourself, because you won't be able to. But know the reasons behind what they're doing, if that makes sense. So make sure you've watched the lectures and make sure you know what they're doing, but you don't necessarily know how to do it just yet, if that makes sense. [Jaz]That's right. You have to observe it a lot of times first before you actually internalize it. And sometimes when you read it on a lecture in a book, when you see it in the real life, it's a whole different type of learning. And it's like a disconnect there. And then that part of the brain lights up where it all joins together. That's a great tip. Don't beat yourself up that you'll need someone else to do it for you for the first few times. As long as you're making visual notes and actually thinking, okay, I'm going to do this and I'm paying attention and always keep asking why. So I love that you said that. And then something to extend to when you get qualified, and you're not sure, hmm, what record do I need to send to my lab? If ever you find yourself in a scenario where you're like, hmm, what do I need to send to my lab? Always think what information, if the lab get this case, what information would they need to recreate the person, recreate the patient, basically. So, of course, the bite registration is that the lab know where to put the teeth so that when they bite together, there's not too proud, not too shy. So in your case, what was on this gentleman's upper teeth? Was he a natural dentition or a denture? [Emma]No, he had a full upper acrylic already, which was fine. So we just replaced the lure. [Jaz]So essentially you had the lower wax block, the wax rim, and you melted enough of it to the desired vertical dimension, how we figured out. And as long as lots of teeth were touching at once, when you bit together, basically that's essentially what you went for, I imagine. [Emma]Yeah. [Jaz]How did you transfer the upper denture to the lab? [Emma]So we had taken an alginate impression of that denture. So we sent that to the lab as well.

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