ID help - is it a tooth?

[doitforfenton]

I found this on an Oregon beach. I thought for sure it was a tooth, but can't find any matches. Does anyone recognize it as a shell or a tooth? Here are photos (two are a little blurry, but you can see the shape) Also, it is about 1 inch wide, and is a little more textured than the photos appear (like a human tooth with small ridges)

<a href="http://www.badongo.com/pic/2492190" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/2492190">http://www.badongo.com/pic/2492190</a><!-- m --></a>

<a href="http://www.badongo.com/pic/2492194" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/2492194">http://www.badongo.com/pic/2492194</a><!-- m --></a>

<a href="http://www.badongo.com/pic/2492195" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/2492195">http://www.badongo.com/pic/2492195</a><!-- m --></a>

Thanks,
Chrissy