Verb
costen (third-person singular simple present costens, present participle costening, simple past and past participle costened)
(transitive, obsolete) To try; tempt.
Specifically, Costen believed that the cause of TMD was mandibular over-closure, citation recommending a treatment revolving around building up the bite. Source: Internet
History Temporomandibular disorders were described as early as ancient Egypt. citation An older name for the condition is "Costen's syndrome", eponymously referring to James B. Costen. Source: Internet