Definition and taxonomy this review deals with neuropathic pain of traumatic origin affecting the trigeminal nerve, i. Symptomatology the clinical characteristics of pttn vary considerably, partly due to the type and extent of injury. Trigeminal neuralgia, atypical odontalgia (phantom tooth pain), burning mouth syndrome, traumatic neuropathies, postherpetic neuralgias and complex regional pain syndrome are neuropathic pain conditions in the orofacial region that can be encountered in pain and dental clinics. post traumatic trigeminal paintrigeminal neuropathic painatypical odontalgia. It is being increasingly recognized that it is not just injuries such as trauma to the facial skeleton that can result in neuropathic pain of the trigeminal nerve but also various dental procedures ranging from root canal therapy and extractions to dental implants. Ptnp, which stands for post-traumatic trigeminal neuropathic pain, is a painful condition usually caused by trauma. It can start after patients have had dental treatment such a routine dental cleaning, a filling, a crown, a root canal, an extraction, etc. Posttraumatic neuropathic pain is a condition that can occur after a spinal cord injury and can sometimes be referred to as central neuropathic pain, central deafferent pain or neurogenic pain. Following spinal cord injury, patients can experience pain in areas of the body where they. Its usually caused by chronic, progressive nerve disease, and it can also occur as the result of injury or infection. Peripheral nerve damage is classified into three categories based on severity neurapraxia, axonotmesis, and neurotmesis. Peripheral nerve damage is the second most common category of in anesthesia related complications. The double-crush phenomenon is a term used to describe preexisting neurological injury that limits the neurological reserve of affected nerves. A 66-year-old man developed intractable trigeminal neuropathic pain after trauma of the supraorbital branch of the vth nerve, associated with tactile and thermal sensory loss in the painful area. Mcs was performed using neuronavigation and transdural electric stimulation to localize the upper facial area on the motor cortex. Abstract treatment of facial pain must distinguish between classic trigeminal neuralgia, due to chronic, intracranial, vascular compression and posttraumatic facial pain due to direct injury to one or more branches of the trigeminal nerve. This chapter describes an approach to treating posttraumatic facial pain that is based upon the principles of peripheral nerve surgery. The traumatic event may be mechanical, chemical, thermal or caused by radiation. Neuroablative procedures for trigeminal neuralgia, aimed at the trigeminal ganglion or nerve root, may result in neuropathic pain involving one or more trigeminal divisions this should be considered as post-traumatic and coded here.