Inclusion Criteria:  Patients with trigeminal neuralgia, diagnosed in accordance with the International Headache Society (7) and with a visual analogue score (VAS) for pain of at least 7 or more for a minimum of 3 months before the intervention . Patients on a stable analgesic regimen for 2 weeks (consisting of at least two analgesics, including anticonvulsants) before the intervention . Patients examined by use of MRI/A of the brain to exclude secondary neuralgia.  Exclusion Criteria:  Patients with severe mental or psychiatric disorders Patients with history of drug abuse, high intracranial tension and history of MVD, SGK, balloon compression, RF treatment, or glycerol injection The possibility of vascular loop compression and other causes of TN