What kind of settlement should I expect for a work related injury where I had a joint implant in my big toe?

I had an accident, a faulty electric pallet jack briefly pinned my foot between the jack and a pallet, that caused bone spurs on my (R) big toe joint and had a joint implant put in after 2-3 months of the insurance wanted causation from the doctor even though they had his findings.
The insurance company now, 10 months after surgery, wants to settle the claim. How to I figure out what monetary amount to settle for with the thought that insurance may not do any further medical work if problems occur in the future because it is a preexisting condition and I might conceivable be retired at the time?