- 期刊
Removal of a Separated Nickel-titanium Instrument from a Three-rooted Mandibular First Molar
由一下顎三牙根第一大臼齒的器械斷針病例處置：對下顎三牙根第一大臼齒在種族的文獻回顧
摘要
二十歲臺灣女性在左側下顎第一大臼齒有一斷裂K3鎳－鈦牙銼針在其遠心舌側根管。由於這顆下顎第一大臼齒牙齒遠心舌側根的特殊解剖形態，在作牙髓腔開擴時不再是之前傳統的三角形開擴。本病例該斷裂鎳－欽牙銼針在手術用根管顯微鏡下利用超音波根管銼針去除，經過完全清創與修形及充填後。術後四個月的追蹤，患者症狀已消。文獻回顧不同人種與華人其三牙根下顎第一大臼齒發生率，牙科醫師作診斷或根管治療時應特別注意這種有種族特性（尤其在臺灣區）三牙根下顎第一大臼齒的高發生率以提高牙醫診治的成功率。
並列摘要
Permanent mandibular first molars usually have a mesial root and a distal root and three root canals, but variations in the number of roots and in canal morphology are not uncommon. The additional third root in permanent mandibular first molar variants that have three roots is typically distributed lingually. Herein, we report on a 20-year-old Chinese female who presented with a separated K3 nickel-titanium instrument in the distolingual root canal of her left mandibular first molar. We removed the nickel-titanium fragment using several ultrasonic tips under a dental operating microscope. The root canals were cleaned and shaped thoroughly and then obturated by a warmed gutta-percha compaction method. At 4-month follow-up, the patient was free of symptoms.
延伸閱讀
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