Thanks for your query.
As this is an advanced case of lumbar spondylitis
because of numbness
,& pain .If conservative treatment of analgesics,multivitamins,calcium , intermittent pelvic traction ,ultrasonics fail then surgery is the only alternative.Keeping in mind age conservative treatment is better.
‘Hope I have answered your query, I will be available to answer your follow up queries, “Wish you Good Health and trouble free speedy recovery”