Okay. We will kick off lecture today. We’re going to move onto dental tissues and their replacements. It’s actually probably a good timing following up on Professor Ritchie’s lecture where he talked about bone fracture and moved that into the role of fracture in teeth. Actually if you read the College of Engineering LabVIEW notes this month, the article featured actually is on Professor Ritchie, I think you will find that interesting, he talks a lot about how it’s moved from fracture of ceramics and engineering materials into fracture mechanics of bone. So it’s a nice short article that I think you’ll find quite relevant.
Dental tissues and replacements overview
Okay. So we’ve got a few examples with us today that we’ll go through as we get to the end of class but we’re just going to start with just a basic overview of dental tissues and their replacements and so the first slide just really is an overview, talk a little bit about the structure of a tooth, we’re going to look at this in cross-section in terms of structure. So again this builds on what Professor Richie talked about in terms of the constituents of occlusals and how they’re oriented and how that plays a role in the basic mechanical properties. Then we will look at what it takes to actually replace a tooth. So obviously there’s a cross-section, you can see the screw threads here. This is not a real tooth, this is a man-made replacement. And then we’ll look at just titanium and osseointegration and then we will finish up with TMJ implants and look at some of the issues there.
And one of the things that you will hopefully see as themes that a lot of the dental issues and dental materials very much so are like orthopedics. In fact, the two fields go hand-in-hand. We borrowed some things from them. Bone cement is namely the primary material we borrowed from their community. So the dental adhesive that many of you have probably been exposed to is really the same basic chemistry that gave us bone cement for the connection between the metal implant and the bone.
So dental issues, when we think about orthopedics it’s easy to think about total hip replacements, total knee replacement, shoulder replacements or something afflicting the elderly with osteoarthritis. We can get a little more close to home with athletes when we talk about ligament tearing or tendon rupture, or even talking about meniscus tears of the knee. And so then the athletes start to have some relevance. But when you talk about dental, it’s right down to childhood. So you can start to talk about dental decay and loss of teeth right down to a small child who actually has an appropriate tooth protection. And a lot of this has been channeled by the use of fluorine in our water to actually change the solubility of the enamel and also to improve some of the mechanical properties. So lot of people today in this culture don’t experience some of the dental decay that had been experienced in previous decades.