These are her adult teeth and she's in her 20's. Her teeth had been knocked and are now loose and shifted position. About a fortnight has passed; the pain has subsided, as has some of the looseness. The teeth are not broken, but feel loose.
Her gum is healing. And she is awaiting a follow up appointment.
What are her chances, following trauma of adult teeth, do they ever stabilize back to original firmness?
Most likely then it was simply an injury to the tissues supporting the teeth - a concussion or subluxation in dental terms.
Both of these are unlikely to cause an issues in the long term, but should be monitored closely for any issues, as the teeth were traumatised at the end of the day. If the teeth are slightly loose, sometimes a dentist will bind the teeth together - but this is not essential.
Having seen her very recently, I can say the gap which appeared between the two teeth after the impact, now almost closed up, yet somewhat differently to how it was before.
Ordinarily, how long would it take things to get back to how it was before, 12+ months (in regards to stability)?
Any other advice, besides a healthy diet, which you could give?
Most teeth will return back to normal after a few weeks, but will vary person to person and the extent of the injiry - as I haven't seen your niece, I can't tell you how long it'll take exactly. You're only 2 weeks from the injury date - give it some time.
Just avoid biting into things like apples while the healing takes place and make sure to attend all the review appointments at the dentist to keep an eye on the teeth injured.
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