ossamenta: Weasel skull (Default)
Last Friday was Day of Archaeology 2013. And I didn't post a thing. Well, to be fair, it would have been a very unrepresentative day, since I took half the day off to show some visiting friends Oxford. Perhaps I'll do something for next year.

But I have something fun to show you. Among the bones from a small, fairly "normal"/boring evaluation there was a very fragmented horse skull with two deformed teeth. One had a large hole in the occlusal surface - that's the chewing surface - and a large groove on the side. They may be connected. There is still soil deep in the hole and in the groove that I haven't been able to remove. I guess if I soaked the tooth it would be possible, but I don't want to risk any flaking from long immersion. The other tooth also has a large groove on two sides.

 photo P1050324_zpsa029fdaf.jpg  photo P1050317_zpsda0b1194.jpg
Lingual (tongue-side) and side view

 photo P1050318_zpsf1b79051.jpg  photo P1050321_zps9cc53901.jpg
Buccal (lip-side) and occlusal view

I think that I might be dealing with caries in the occlusal surface that went deep and caused an infection in the root. The infection went outward and into the gum, from which it went into the neighbouring tooth. But I have never seen such deformation before, and occlusal caries in human teeth - admittedly far smaller than horse teeth - usually break the crown from within without any other changes in the enamel surface.

I think I need to bring the teeth to the next PZG meeting, as it's a pathology-themed meeting. Hopefully someone there will recognise this.
ossamenta: Weasel skull (Default)
This week's weird pathology is a set of three pig front teeth from the lower jaw. They have fused at the tip, but are still not fully developed at the root. It seems to me that there are three different teeth: one decidious incisor (front milk tooth), one adult incisor and one adult canine tooth. Judging by the shape of the canine and of its enamel area, I think it's a female pig.

So what on earth has happened here? I've never seen a similar tooth fusion before. I think that as a little piglet, she (?) was kicked in the snout (or perhaps she went adventuring and fell hard on her face), and as the jaw healed from the fracture, this caused the developing teeth to move too close, and just as a tree can grow around and into a fence, the three teeth fused.


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ossamenta: Weasel skull (Default)
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