Pilonidal cyst scar. How can I remove it?

I had a pilonidal cyst 6 years ago ans was removed by surgery And healed by cleft left method Completly heal leaving the last layer with a scar easily cut The bad side that untill now if i set about 8 h for 2 days maybe (iam a dentist) , its open again Travelling long distqnces , And with abs exercises too I went back to my surgeon too many times and the same answer its healed and didnot come back and antibiotic ointment lulogen plus I want to get rid of this scar and reopening