K Jean writes:

I also  believe I read somewhere that it can lead to a wide separation 
between the two  front teeth (a la David Letterman's smile.)

I find this website very  instructive:

Lawrence A. Kotlow, DDS 
 
~~~ Yes, Dr. Kotlow's site is excellent, both for professionals and  it has 
a colorful, detailed, and helpful "booklet" for parents they can open and  
read on the site: Breastfeeding Should be Fun and Enjoyable.
_http://www.kiddsteeth.com/nursingbookmayc2011.pdf_ 
(http://www.kiddsteeth.com/nursingbookmayc2011.pdf) 
Lots of good articles in the Articles section.
An interesting aspect/sensitivity aspect of the decision-making  process 
about releasing the upper labial frenulum is discussing the oral  
self-cleaning aspects, and the impact it might be having on the baby's ability  to feed 
well ( efficiently, with normal effort, and not hurting mom), and the  
parents listen, but then feel torn because this space between the front teeth is  
a family characteristic and something mom loves about dad, for example. It 
was a  hard decision for them to think about losing a trait that one 
associates with a  loved one or ones,  and in the loved one's case the issues 
didn't impair  feeding, or they did but no one had the potential solution...
 
Peace,
Judy
 Judy LeVan Fram, PT, IBCLC,  LLLL
Brooklyn, NY,  USA
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