My mom has mild dementia and is in assisted living. She is four weeks in to having a boot for a hairline tibia fracture. She has required 24 caregiving during this time. The boot is off in 2 weeks. Realistically, how long will it take her to be fully ambulatory again? She has ongoing physical therapy.
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Doc says the only way to guarantee it will heal is to break it all the way, and set it.
Another fall, or even banging it, could set it all off again. Also..I am only 60. Your mom is less likely to heal than I am.
There really is no answer here--6 weeks in a "normal healthy" person, but then if Mom is an AL, then she obviously has other health problems. There will be ongoing PT and hopefully she will be walking again in (a guesstimate) 8 weeks, and then very possibly with a cane or walker for stability. Was this break a result of a fall? If so, then she likely will need an aid for safe walking.
You should ask her Dr! They didn't tell you what to expect? I know with my mother, every fall of any severity set her back a couple of weeks, hip replacement put her in a wheelchair, then she graduated to using a walker, FT. Prior to the surgery she was walking with just a cane. Just one more indignity to getter older.
I wish you well--and hope she heals quickly and well.