ピエゾサージェリーを用いた抜歯窩からの上顎洞粘膜内異物の低侵襲的除去手術（臨床報告）

This report describes a minimally invasive procedure for removal of a foreign body concealed under the sinus mucosa via the extraction socket approach using piezosurgery. First, the exact position of the foreign body was determined by cone–beam computed tomography. After the extraction of the second molar palatine root, the residual gutta–percha point in the sinus mucosa was removed using a piezosurgery with a round diamond tip and a root canal–filling forceps through the extraction socket. Oxidized cellulose was placed on the bottom of the extraction socket and the socket was covered with a periodontal dressing material. There were no postoperative complications