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    • 63. 发明专利
    • Method of manufacturing endodontic instruments
    • 空值
    • JP4524079B2
    • 2010-08-11
    • JP2003112278
    • 2003-04-17
    • オルムコ コーポレイション
    • カーロス、アロイスガーマン ゲイリー
    • A61C5/02B21F7/00B21F99/00B21K5/04B23H9/00B23P15/00C21D8/06C22F1/00
    • B21F99/00A61C5/42B21F7/00B21F45/008B21K5/04B23H7/12B23H9/00B23P15/00C21D8/065C21D2201/01C22F1/006Y10T29/49567Y10T29/49568
    • Method for manufacturing endodontic instruments (10, 11) having either helical (24) or non-helical (26) flutes. A method is provided for forming superelastic endodontic instruments (10) having helical flutes (24), wherein a wire of superelastic material is formed into an instrument blank (23), and before twisting, the superelastic alloy is brought to an annealed state comprising a phase structure including a rhombohedral phase alone or in combination with austenite and/or martensite, or a combination of martensite and austenite. In this annealed state, the instrument blank (23) is twisted at low temperature, for example less than about 100 DEG C, and advantageously at ambient temperature to the final desired twisted configuration. The twisted instrument (10, 11) is then heat treated and rapidly quenched to a superelastic condition. A method is further provided for manufacturing endodontic instruments having either helical (24) or non-helical (26) flutes with hard surfaces and resilient cutting edges by either an EDM or ECM process, wherein material is removed from the instrument blank (23) in the desired flute pattern. The EDM or ECM process disintegrates the surface material, and as it cools, at least a portion of the removed material re-deposits onto the surface being machined to form a recast layer having a surface hardness that is at least about 15% greater than the hardness of the material forming the instrument blank (23). A method is further provided in which an EDM or ECM process is used to form an instrument blank (23), followed by twisting at low temperature.
    • 用于制造具有螺旋形(24)或非螺旋形(26)凹槽的牙髓器械(10,11)的方法。 提供了一种用于形成具有螺旋槽纹(24)的超弹性牙髓治疗仪器(10)的方法,其中超弹性材料的丝线形成为仪器坯料(23),并且在扭曲之前,使超弹性合金进入退火状态,包括 包括单独的或与奥氏体和/或马氏体组合的菱方相,或马氏体和奥氏体的组合。 在该退火状态下,仪器坯料(23)在低温下扭曲,例如小于约100℃,有利地在环境温度下扭转到最终期望的扭曲构型。 然后将扭曲的仪器(10,11)进行热处理并迅速淬火至超弹性状态。 进一步提供一种用于通过EDM或ECM工艺制造具有螺旋形(24)或非螺旋形(26)带硬质表面和弹性切割边缘的牙髓矫正器具的方法,其中将材料从仪器坯件(23)中移除 所需的长笛图案。 EDM或ECM过程使表面材料崩解,并且在其冷却时,至少一部分被去除的材料重新沉积到被加工的表面上以形成重铸层,该重铸层的表面硬度大于 形成仪器坯料的材料的硬度(23)。 还提供了一种方法,其中使用EDM或ECM工艺来形成仪器坯料(23),然后在低温下扭曲。