On Tue, 16 Dec 2008 11:44:59 -0500, Spehro Pefhany
wrote:

On Tue, 16 Dec 2008 08:29:54 -0800, John Larkin
wrote:

On Tue, 16 Dec 2008 11:31:27 -0000, "Arfa Daily"
wrote:


"John Larkin" wrote in message
...
On Mon, 15 Dec 2008 16:44:39 -0800, Archimedes' Lever
wrote:

On Mon, 15 Dec 2008 19:34:17 -0000, "Peter Hucker" wrote:

A pack-a-day smoker will lose approximately 2 teeth every 10 years.


But the average person loses about 6.5 teeth every 10 years. I suppose
that means smoking is good for dental health.

John


I haven't lost 6.5 teeth in my entire (considerable) adult life, let alone
the last 10 years. I don't think that I could come up with anyone in my
extended family or friends, who has lost that many either. Where did this
little gem of a 'fact' come from - "Dentistry for Beginners", published
1802, maybe ?

Arfa


I just did the math. 20 baby teeth, 32 adult teeth, 80 year lifespan.

John

Been doing MTBF calculations recently?

Actually, yes. Some of our customers insist on having the silly
numbers. Our actual field failure rates are generally several times
better than MIL-HBK or Bellcore calculated values. Unless there's a
real problem, in which case it's worse until we fix it.

You might as weigh it and apply a FITS/gram factor.

John