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dental root canal

A root canal treatment and appliance technology, applied in dentistry, medical science, tooth filling, etc., can solve problems such as poor cutting performance, out of the treatment path, and difficult operation

Active Publication Date: 2022-08-09
MATSUTANI SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the excellent cutting performance, the cutting performance against the root canal wall may be given priority to at the end of the root canal, which may deviate from the intended treatment path, and it may be difficult to operate due to deep penetration into the root canal wall.
[0016] In addition, although there is also provided a substantially D-shaped root canal treatment instrument in which the cross-section of the working part is composed of a plane and an arc surface throughout the entire length, the root canal treatment instrument has a non-flexibility and is suitable for penetrating the root canal. treatment, but the problem of poor cutting performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0090] like figure 1 As shown, a dental file (dental root canal treatment instrument) 100 includes: a working part 100a for cutting the root canal; a shaft part 100b connected to the rear end of the working part 100a; and a rear end of the shaft part 100b It is attached to and attached to the not-shown grip of the dental handpiece. As the raw material of the dental file 100 , for example, high-elasticity nickel-titanium, which is suitable for the treatment of complex curved root canals, is used.

[0091] The working part 100a of the dental file 100 is configured such that the envelope surface of the outer surface has a tapered shape in which the cross section becomes smaller toward the distal end, and the cross section having a similar shape is formed in a spiral shape. More specifically, the cross-sectional shape of the cross-section perpendicular to the longitudinal direction of the working portion 100a, for example, figure 1 The II-II line cross-sectional diagram to the V...

Embodiment approach 2

[0096] The order of forming the linear portions 112 to 114 from the distal end portion toward the proximal end portion of the dental file 100 may be, for example, as follows Figure 6 to Figure 10 shown. That is, in Image 6 in the section of the II-II line position, such as Figure 7 shown, with the same figure 2 the same cross-sectional shape, but in Image 6 in the section of the III-III line position, such as Figure 8 As shown, a third linear portion 114 is formed substantially parallel to the first linear portion 112, and the third linear portion 114 is located at the Figure 7 The arc-shaped portion 111 is away from the position corresponding to the chord of the first linear portion 112 . Therefore, a substantially rectangular cross-sectional shape surrounded by the linear portions 112 and 114 and the two arcuate portions 111a and 111b is formed. Subsequently, in Image 6 The IV-IV line is located in the cross-section, such as Figure 9 As shown, the second lin...

Embodiment approach 3

[0100] The vicinity of the base end of the dental file 100 is not limited to a rectangular cross-sectional shape, and may be formed, for example, Figure 11 to Figure 14 The cross-sectional shape of the triangle shown. That is, in Figure 11 in the section of the II-II line position, such as Figure 12 shown, with the same figure 2 the same cross-sectional shape, but in Figure 11 in the section of the III-III line position, such as Figure 13 As shown, the third linear portion 114 is formed to be continuous with a connection point 121 which is an upstream end portion of the first linear portion 112 in the main rotational direction R of the dental file. Subsequently, in Figure 11 in the section of the V-V line position, such as Figure 14 As shown, the second linear portion 113 connecting the connection points 122, 123 is formed, thereby forming a triangular cross-sectional shape.

[0101] In the case where the cross-sectional shape is formed as described above, espec...

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Abstract

The invention provides dental use of root canal treatment appliances to improve the flexibility, cutting and / or anti -fracture of dental use of root canal treatment appliances.In the dental root canal treatment appliance (100), the cross -section shape of the first long side position of the end side of the end is composed of the arc (111) and the front line (112)The number of line -shaped parts of the cross -terminal side of the end of the end is formed to increase.

Description

technical field [0001] The present invention relates to a root canal treatment instrument having a helical cutting edge used for enlarging, cleaning or shaping a root canal during dental treatment. Background technique [0002] As a dental root canal cutting tool used for enlargement and cleaning of a root canal in dental treatment, there are drills and files (for example, refer to Patent Document 1). The drill is mainly used for cutting in the root canal by rotation, and the file is cut in the root canal by rotation or axial push-pull. [0003] A general dental file includes a dental file that is used to hold a grip portion by hand, and a dental file that is used by connecting the grip portion to a dental handpiece. A dental file includes: a working portion in a shape that is helical and tapered toward a distal end; a shaft connected to a rear end of the working portion; and a grip portion connected to the rear end of the shaft. The main performance required for such a de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C5/42A61C5/44
CPCA61C5/42A61C5/44
Inventor 松谷和彦村井秀行堀井真理村上悦男高野真弘
Owner MATSUTANI SEISAKUSHO CO LTD
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