Öz Dental implant displacement into the maxillary sinus is a rare complication. Maxillary sinus displacement of the implants is often associated with incorrect surgical planning or inadequate surgical technique. Dental implants often result in foreign body reactions in the sinuses and should be removed in order to avoid the development of sinus complications. A careful preoperative clinical and radiological evaluations and surgical foresight regarding anatomical formations should be done correctly and atraumatic technique should be performed in order to prevent these complications. In this study, a retrospective case series was presented to discuss the necessity of removing the sinus dental implant even if it is biocompatible.

Multiple idiopathic external root resorption is a rarely reported condition which has been observed in single or multiple teeth. Pathological tooth root resorption may develop due to many local or systemic factors. By definition, if no etiologic cause can be determined, the definition of 'idiopathic' is used. It is usually detected as an incidental radiographic finding. However, it may cause pain and mobility in severe cases. In this work, presents a case of external apical root resorption involving multiple teeth in which etiology was not identified. The aim of this case report is to evaluate the treatment approach in cases of rare multiple idiopathic apical root resorption.