公开(公告)号：US6012922A

公开(公告)日：2000-01-11

申请号：US148091

申请日：1998-09-04

申请人： Eugene J. Novak

发明人： Eugene J. Novak

IPC分类号： A61C1/18 ,  A61C17/00 ,  A61L1/08 ,  A61L1/14

CPC分类号： A61C17/005 ,  A61C1/185

摘要： A dental handpiece (10) is provided with a drive motor (13), a drive shaft (12) operatively affixed to the drive motor (13) at one end of the drive shaft (12). A dental tool (11) is operatively affixed at the other end of the drive shaft (12). The drive shaft (12) is journaled within a axial displacement bearing (60), such that manipulated rotation of the dental tool (11) causes a first drive shaft section (61) to be axially displaced from and relative to a second drive shaft section (62). The axial displacement bearing (60) is caused to contact a bearing (51) thereby causing the drive shaft (12) to bind due to the frictional forces generated by that contact. This allows sufficient force such that the dental tool 11 can be disengaged from the handpiece (10).

摘要翻译： 牙齿手柄（10）设置有驱动马达（13），驱动轴（12），其在驱动轴（12）的一端可操作地固定到驱动马达（13）。 牙科工具（11）可操作地固定在驱动轴（12）的另一端处。 驱动轴（12）位于轴向位移轴承（60）内，使得牙科工具（11）的操纵旋转使得第一驱动轴部分（61）从第二驱动轴部分 （62）。 使轴向位移轴承（60）与轴承（51）接触，从而使驱动轴（12）由于该接触产生的摩擦力而结合。 这允许足够的力使得牙科工具11能够从手持件（10）脱离。

公开(公告)号：US6106296A

公开(公告)日：2000-08-22

申请号：US896381

申请日：1997-07-18

申请人： William B. Johnson

发明人： William B. Johnson

IPC分类号： A61C5/02 ,  A01C5/02

CPC分类号： A61C5/023

摘要： A method of cleaning and shaping a root canal in a tooth in preparation for filling the root canal with a filler material, such as gutta percha, as a part of an endodontic procedure includes the step of inserting into the root canal a tapered file having a spiraled scraping edge formed thereon, the scraping edge having a neutral rake angle, the file having a taper of about 0.04% such that, as a sequence of files of the same characteristics but having different tip diameters are employed, the root canal is shaped and cleaned from the coronal area towards the tooth apex in contrast to the traditional endodontic procedure wherein root canals have been shaped and cleaned in the step back method beginning with the root canal apex and progressing towards the coronal area.

摘要翻译： 作为牙根治疗程序的一部分，用牙齿清洁和成形牙根管的方法是用填充材料（例如牙龈等）填充根管，其中包括将根管插入具有 螺旋刮削刃形成在其上，刮削刃具有中立的前角，该档具有约0.04％的锥度，使得作为具有相同特征但具有不同尖端直径的文件序列，根管成形， 与传统的根管手术相比，从冠状面朝向牙齿顶端清洁，其中根管已经以从根管顶端开始并朝着冠状区域前进的后退方法被成形和清洁。

公开(公告)号：US6074209A

公开(公告)日：2000-06-13

申请号：US166881

申请日：1998-10-06

申请人： William B. Johnson

发明人： William B. Johnson

IPC分类号： A61C1/08 ,  A61C5/02

CPC分类号： A61C5/023 ,  A61C5/025

摘要： An improved file for use in the endodontic preparation of a root canal, the file having a handle portion at one end and an active working portion tapering toward the distal end, the active portion having an external surface with at least one helical flute forming a helical scraping edge and, preferably, an axially adjacent land, the working portion having areas or zones of reduced surfaces that contact root canal surfaces during use. Preferably the zones are a plurality of axially spaced zones of reduced diameter so that the total length of file working portion in contact with canal wall surfaces during use is reduced. In manufacturing the improved file, a plurality of axially spaced zones of reduced diameter are formed on the working portion of a conventional file, including helical flutes and lands as desired, wherein the file of the invention includes an undulating external working portion profile.

摘要翻译： 一种用于根管根管制剂的改进文件，所述文件具有在一端的手柄部分和朝向远端渐缩的主动工作部分，所述活动部分具有外表面，所述至少一个螺旋形槽形成螺旋形 刮削边缘，优选地，沿轴向相邻的平台，所述工作部分具有在使用期间接触根管表面的减小表面的区域或区域。 优选地，这些区域是直径减小的多个轴向间隔的多个区域，使得在使用期间与文件管壁表面接触的文件工作部分的总长度减小。 在制造改进后的文件中，根据需要，在传统文件的工作部分上形成多个轴向间隔的减小的区域，包括螺旋槽纹和平台，其中本发明的文件包括起伏的外部工作部分轮廓。