Any steering/mounting parts that you did not replace should be replaced. This is one area that I do not make any exceptions when I do my cars. If it hasn't broken yet, it's only a matter of time, and you can't pick the time. Yours is already broken and cannot be driven until it is repaired.

It's not easy, it's not all that cheap, but it makes for a much safer driving experience. I've been through a ball joint failure at speed, and it's not fun.