Archive for November 7th, 2005
My Sister The Byrd.
Fauna November 7th, 2005
This is my sister, Polly. She is an African Grey Parrot byrd. If you put your nose too close to her she bites it very hard and it hurts. She tells me to roll over using the Girl’s voice and to sit using the Boy’s voice.
Spatial Elaboration of Working Length.
Morphology November 7th, 2005
To put this topic to rest, I took the same tooth from earlier and xrayed it from two directions with 90 degrees rotation in between. The first film shows a file in the tooth just a bit past ideal working length (if your goal is the radiographic apex). The file is a little long past the root surface.
The second film shows the tooth rotated 90 degrees clockwise. No change in relative position of the file has taken place but it appears much further out the root than before.
This is a fairly simple concept, but is part of so much debate in Endodontics…
