Two of my bottom front teeth are in a different position than when I was 15. I do have slightly receding gums. Would bone loss be the likely cause?

Possibly. Bone loss can allow teeth to shift. Shifting teeth can cause bone loss, especially if teeth move off of their bone support. If you notice a little shifting now, you will probably see a lot of shifting as time goes by. Please see an Orthodontic Specialist to evaluate the positions of your teeth and possible stabilization treatment options. Consultation with a Periodontist may also be indicated.
Not likely. The most usual cause is shifting that occurs over time. Especially in lower front teeth. It should not be a concern if you can keep them clean.

Related Questions

If I have moderate-to-severe dental gum recession (bottom front teeth) I probably have moderate bone loss, as well?

Yup. This was explained to you in response to a different post you made. The bone will resorb at least as much as the gum recedes. Read more...
Peridontal bone loss. That can best be determined by a periodontist. However, this is probably the case as you had a significant periodontal procedure (s;c) and lanap performed. Lanap is performed when there is bacterial invasion of both the periodontal/gingival tissues and the bone. The purpose the of lanap/ scaling/root planning is to remove these bacteria to allow easier access for cleaning and proper home care. Read more...
Yes that is true. Yes, moderate-severe gum recession is the result of moderate-severe bone loss in the area. The gum tissue can not exist with out the underlying support of the bone. If you did not also have the bone loss, then the bone with be exposed where the gum has receded. You need to see a periodontist every 2-4 months for continued follow up care. Read more...