I posted the following October 2005

So, I'm 32 and have until now had a healthy and even bite.  Over the
last year my lower incisors have started to shift and tilt to my left,
opening a gap between my right lower incisor and right 2nd incisor.  The
gap is now approaching 1 mm and I'm not sure if this process is slowing
down. The previously healthy gaps between my incisors and left eye tooth
is now gone and the teeth are beginning to cramp in the lower front left
area.  My gums are healthy, no sign of disease according to my dentist.
 I went to her a few months ago complaining about the developing bite
problem. It wasn't so apparent at that point that the teeth were moving
and she didn't have a clear idea of what the origin of the problem was.
 The left lower incisors in particular meets the back of my upper left
incisor.  Otherwise I am healthy, not doing anything different that I am
aware of and don't have any weird jaw growths etc... I look after my
teeth and gums (electric soft head rotating toothbrush, floss, mouthwash
etc). The pressure my teeth are experiencing is also leading to gum
recession, and this bothers me.

Fast forward to the present, I'm almost certain my problem is related to
tongue thrust.  For some inexplicable reason my tongue no longer seems
to belong in my head and is taking every opportunity to press outwards
on my lower front teeth.  At times talking becomes uncomfortable as I'm
aware of my tongue abrading against my lower front teeth.    This is
also causing the gums trauma and the gum line is receding as a result.
What should I do about this?  Thanks.