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A root end surgery, also known as apicoectomy (''apico-'' + ''-ectomy''), root resection, retrograde root canal treatment (''c.f.'' orthograde root canal treatment) or root-end filling, is an endodontic surgical procedure whereby a tooth's root tip is removed and a root end cavity is prepared and filled with a biocompatible material. Microsurgical endodontics - dental surgery using a microscope - may be performed. This is usually necessitated when a conventional root canal therapy had failed and a re-treatment was already unsuccessful or is not advised. State-of-the-art procedures make use of microsurgical techniques, such as a dental operating microscope, micro instruments, ultrasonic preparation tips and calcium-silicate based filling materials. Removal of the root tip is indicated to remove the entire apical delta ensuring no uncleaned missed anatomy. Extraction may be the only alternative. Where necessary prosthetic replacement with a denture, dental bridge or dental implant may be considered. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Apicoectomy」の詳細全文を読む スポンサード リンク
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