i agree- there are a number of things which would need to be looked at and taken into consideration before any advice on actual treatment could be given.
It is impossible to know why your teeth are loose- have they been knocked recently for example?
Assuming they haven't- my guess (and it is just a guess) is that the issue here is periodontitis (gum disease- which has involved the boney support of the teeth).
generally if you have a problem with gum disease the first thing to identify why.
Do you smoke? Smoking is a major factor in causing gum disease, It reduces blood flow to the gums- so the fact that you aren't getting any bleeding doesn't mean that there is no gum disease. Alot of people who stop smoking comment on the fact that for a while after they stop- their gums seem to bleed more (as the circulation is improving!).
Your oral hygiene (brushing/flossing etc), and diet would also need to be looked into.
The severity of the gum disease would need to be assessed and that would dictate what treatment would be needed. The dentist would need to do this assessment for ALL of your teeth- as if these ones have this problem- it is likely that others do too.
Treatment may simply involve cleaning around and under the gums. this can be carried out by the dentist, a therapist or hygienist or a periodontist. There are other options available if the gum disease is more advanced - but your dentist will discuss this with you.
Get a clinical opinion with a dentist asap- all of this is guesswork and may be way off the mark!
Hope it helps though!
Regards
Mike