Hw to treate pars defect of spine, l5 and s1, is t treatable and complicated...?

It depends: Most patients with spondylolysis do not require surgery but when symptoms are not relieved with non surgical treatments, then patients may require surgery. There are two types of surgery for this condition: lamenectomy and spinal fusion, could combined or spinal fusion could done alone.

Yes treatable: Depends upon your age. Either rest, physical therapy or surgery to fuse l5-s1is the treatment. Brace if teenager with a "hot" bone scan.