Hokyung Lim Korea University Guro Hospital, Korea, Republic of (South Korea) Background There are many reports about traumatic neuralgia and paresthesia after injury of inferior alveolar nerve in mandible due to implants. However, in case of maxilla, although there are not obstacles for implant installation such as nerve, patients sometimes complained of facial pain and paresthesia after surgery. Aim/Hypothesis In this research, we analyzed data and observed progress about facial pain after implant installation on maxilla. Material and Methods This study includes 30 patients who came to the hospital due to facial pain after maxilla implant from 2001 to 2015. Age, sex, location of implant, symptoms, onset of pain, progression, and prescribed drug were scrutinized retrospectively. We classified specific diagnosis by clinical data. Results The average age was 57 years (40˜70). Nine patients were male, and twenty-one patients were female. Seven patients complained right side facial pain and twenty-three patients complained other side. Five cases occurred after implant installation of anterior teeth. There were several trigger factors- 1st surgery (n = 19), 2nd surgery (n = 1), prosthesis fabrication (n = 4), infection such as maxillary sinusitis (n = 1) and cryptogenic (n = 5). Patients were observed during 536 ± 831 days (0–2,906). Medicine such as anticonvulsant, antidepressant, Vit B12, NSAID was prescribed. Eight patients had constant pain and others had paroxysmal pain. Fifteen patients were improved their symptom during follow-up periods. Conclusion and Clinical Implications We could diagnosed 21 cases of post-traumatic trigeminal neuropathy, 8 cases of persistent idiopathic facial pain, and 1 case of headache attributed to disorder of the paranasal sinus by ICHD criteria. Fixture was removed in 13 patients. Six patients were improved their symptom after fixture removal.