SPOILER ALERT! I'm going to reveal the answer to the premolar wear facet question from Part One of this blog, so if you want to take a guess before you read on, click here for Part One.

If you recall the wear facet on the premolar of this image in Part One , I asked that you use your observational powers and think about how it got there.

Observation Image

If your observational prowess suggested that this was a crossover interference, you were correct. The patient is a dentist who has a daytime habit of playing on her teeth while she is working. She didn’t know she “went there” until after her provisionals were in place and she could no longer reach that area where she played. She discovered that whenever she picked up her handpiece, she went right for that tooth!

The fact that the patient has a moderately steep eminence means the mandible moves slightly superiorly on the working side as the balancing condyle translates. The end result is that the patient's curve of Wilson will always be in play for our parafunctioning patients.

Thanks for your participation - all the educated guesses made this blog interesting and fun!


Commenter's Profile Image Vivek Mehta
April 14th, 2010
Thank you, Steve. This was fun indeed! I look forward to future posts.
Commenter's Profile Image Don Young
April 14th, 2010
Thanks Steve-I need to get some ortho models with the bi's actually removed-retro ;p
Commenter's Profile Image Steve Ratcliff
April 14th, 2010
Thanks everyone for a very fun dialog!