My wife was hospitalized for pain management of TN last September. Gamma Knife was the least invasive surgical correction and since she has MS, we thought it would be a good start. Immediately following the procedure, she had a mild episode of pain then was pain free for the past six month. Just last week she started having "less severe" pain episodes, periodically throughout the day. Although the pain is described as less severe, she is under the constant threat of the condition worsening. We are now considering Micro Vascular Decompression.
MVD (compared to Gamma Knife) seems to have a higher success rate with TN. At least that's what the on-line information says.
Hope you feel well.
John