Hello and welcome to ispine Emmie. I have had the same condition as you and ultimately ended up with a fusion as you did. I had a previous attempt to repair the pars fractures that did well initially but ended up failing. Don't give up!
Did the facet nerve burns help at all? Have you had any mri's or ct scans? Do you have leg pain? You might want ask you pm dr to rule out your SI joints as those areas are affected by l5-s1 fusions. Ask you doctor to try some different meds, finding right ones for you will make all the difference in the world.
__________________
BI lateral pars fracture repair for isthmic spondylolythesis on l5 10/2/07. success for about 1.5 years.
Hardware began to fail,  so on to the wonderful world of fusion l5-s1 2/15/10 By the wonderful Dr Frank Coufal. Great so far let see how good this will work!! 
|