Hip replacement

I had a hip replacement six years ago at the young age of 56.  Now, my husband's is sheduled for May 5th.  At his dr. appt. yesterday, my surgeon mentioned me and the fact that my hip may not last for 20 years.  I had necrosis; he has arthritis.  I'll log the saga as it evolves.  I've had trouble off and on with muscle soreness and sciatica.  Overall, my not so new hip has given me the quality of life I seem to always take for granted.