question: best treatment for grade 1 spondylolisthesis of l5 over s1 ,reduced disc height ,partial disc desiccation, mild diffuse disc bulge at L5-S1 level causing mild indentation over ventral thecal sac, mild encroachment of B/L neural foraminal & mild indentation over B/L exiting nerve roots. My father of age 54 is suffering from this problem I want the best treatment for him.