[Unusual cause of the acute appendicitis].

Exogenous foreign particles in the appendix rarely case appendicitis. Their prevalence is reported to be 0.0005%. This fact makes both lay and medical community underestimate possible complications related to the presence of foreign particles in the appendix lumen. Our case review documents risks related with swallowing a sharp foreign particle. The particle concerned was a tooth root--on prosthesis with an acrylic crown, which caused acute appendicitis with the appendical wall perforation by the above mentioned foreign body.