Definition and Background - Neuralgia-inducing cavitational osteonecrosis (NICO) is a diagnosis associated with chronic facial neuralgia caused by a jawbone cavitation. - NICO is different from osteonecrosis of the jaw. - The pain in NICO is believed to result from the degenerating nerve. - The condition is considered rare, and its existence is still debated. - NICO was first described in dental literature by G V Black in 1920 and gained attention from oral pathologist Jerry E Bouquot.

Diagnostic Criteria and Controversies - The diagnostic criteria for NICO are imprecise, and there are flaws in the research supporting it. - Some holistic dentists popularize the diagnosis and treat NICO by surgically removing the dead bone believed to cause the pain. - However, some dentists and maxillofacial surgeons reject NICO as quackery. - The American Association of Endodontists stated that NICO occurrence and treatment at endodontically treated teeth is generally implausible. - Routine extraction of endodontically treated teeth is considered misguided according to the association.

Related Conditions - NICO is sometimes referred to as Ratners bone cavity. - Atypical trigeminal neuralgia and trigeminal neuralgia are related conditions. - These conditions may share similarities in terms of facial neuralgia. - NICO has been studied in relation to jawbone cavities and neuralgias. - Idiopathic trigeminal and atypical facial neuralgias are also associated with NICO.

Research and Evidence - Bouquot et al. conducted a study on NICO, examining jawbone samples from patients with facial neuralgia. - Other studies have explored the etiology, treatment, and long-term effects of NICO. - Some researchers challenge the concept of NICO and its association with facial neuralgia. - The status of NICO as a condition is still a topic of debate. - Further research is needed to establish the validity and prevalence of NICO.

Criticisms and Ethical Considerations - NICO has been criticised as a form of health fraud and quackery in dentistry. - The ethical implications of NICO diagnosis and treatment have been discussed. - Charlatans in dentistry have been associated with the NICO controversy. - The American Association of Endodontists issued a position statement on NICO lesions. - The controversy surrounding NICO highlights the need for critical evaluation and evidence-based dentistry.