Q.african violet care
I have a violet that is about 12 yrs old. It was part of a basket of various houseplants that have died off, but the violet has thrived. The original basket was rather shallow, and subsequently the root system of the violet, became a spiral and is now growing on an angle with much of the root exposed to the air but continues to blossom beautifully. I would like to know how I can salvage the plant and what can I do with the large root system?

After 12 years in the same pot the plant is likely quite root bound and has become leggy looking for light and nutrition.
You can start with repotting the plant and dividing the Violet if needed.
Here are some links to refresh you on the care requirements.
https://www.gardeningknowhow.com/houseplants/african-violet/african-violet-care.htm
https://www.gardeningknowhow.com/houseplants/african-violet/tips-for-easy-african-violet-propagation.htm