My back pain problem is spinal estenose, what you advise? Cirurgury with a spacer on vertebral discs?

Just a decompression. Stenosis is surgically treatedcwith a simple decompression through a small insicion on the back to relieve leg pain with activityt the complex reconstruction you describe is for something entirely different decompression tak e30 min to do one level4weeks to recover from.
Depends. Stenosis is narrowing of the channel in the spinal where the nerves are. It may be silent or it may cause leg symptoms (ache, pain, numbness, tingling, weakness), usually with walking or standing, relieved with sitting or bending forward. Surgery is very helpful when the leg symptoms are severe, limiting a person's activities. Milder symptoms may respond to exercises, injections, medication.