Dear 'netters:  I am researching the issue of dental caries and
breastfeeding, because our New Jersey Breastfeeding Task Force recently
learned of the American Dental Association making an official
recommendation that all breastfed babies be weaned by a year of age.  I
checked with my dentist who was unaware of this but suggested I try
the American Society of Pediatric Dentistry.  The most
likely article this particular dentist was referring to was Brams M,
Maloney J.  "Nursing bottle caries" in breast-fed children.  Journal of
Pediatrics,1983, Vol 103, p 415, which reported on a condition similar to
nursing bottle caries among babies breastfed for 2 or 3 years with a lot
of night-time nursing. I will post results of my literature search.
As far as the prolapsed bladder, I'm no expert but on the surface, the
rationale of "diverted blood and hormones from the pelvis" sounds like
nonsense.  Although hormones do affect the elasticity of the pelvic
tissue, prolapsed bladders are due mostly to structural factors, and
likely are at least as common among bottle-feeding mothers.  I too will
check with local ob/gyn's and urologists, but my guess is that this is
another example of an unsubstantiated reason for weaning.