【joe極白】評論

(A)  K‐Reamer 和 K‐File 的 large size(三角形)和 small size(正方形)橫切面形狀不一樣；另外 H‐file 是水滴型。(B) Historically, root canal instruments were manufactured from carbon steel. Subsequently, the use of stainless steel greatly improved the quality of instruments. More recently, the introduction of the nickel‐titanium (NiTi) alloy in the manufacture of endodontic instruments has resulted in significant improvements in canal shaping because of its increased flexibility compared to stainless steel. 最一開始都是用碳鋼，後來使用不鏽鋼，而最近慢慢開始使用 Ni‐Ti 合金。(C) Reamer configura...