Design method and system of variable cross-section nickel-titanium root canal file applied to root canal preparation and preparation

A design method and design system technology, applied in design optimization/simulation, constraint-based CAD, special data processing applications, etc., can solve problems such as the separation of nickel-titanium files and instruments, and achieve improved file cutting force, perfect treatment system, Improves the effect of channeling ability

Active Publication Date: 2020-10-13
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problem that the nickel-titanium file instrument is prone to instrument separation during the root canal preparation process

Method used

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  • Design method and system of variable cross-section nickel-titanium root canal file applied to root canal preparation and preparation
  • Design method and system of variable cross-section nickel-titanium root canal file applied to root canal preparation and preparation
  • Design method and system of variable cross-section nickel-titanium root canal file applied to root canal preparation and preparation

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Experimental program
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Embodiment 1

[0054] 1) Discretize the file cutting process of the existing nickel-titanium file in the root canal, cut micro-elements in units of 0.1 mm, and discretize the structure of the complete nickel-titanium file into 120 cutting micro-elements;

[0055] 2) For each cutting element, model the cutting force of the tool, such as figure 2 As shown, in a specific example, the obtained tool structure parameters are that the tool nose angle θ is 30°, and the tool nose width L is 0.2mm, and the pressure F of the unit tool is s It is 15N, and the depth of cutting into the dentin material is a p 0.2mm, the nickel-titanium file is under the control of the root canal motor, the rotation speed is 350r / min, and the tool will be subjected to a reverse filing force F in the direction of the filing speed f .

[0056] In the example filing process, the depth of the filing layer a p It is related to the tool tip pressure, tool tip angle and material hardness, so the expression formula shown in fo...

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Abstract

The invention relates to a design method of a variable cross-section nickel-titanium root canal file applied to root canal preparation, and belongs to the field of medical instrument manufacturing. The design method comprises the steps that the overall structure of the nickel-titanium file is discretized; two-dimensional unit tool filing force modeling is conducted on each cutting infinitesimal; athree-dimensional filing force model of the root canal preparation process is established, and the optimal parameters of the cross sections of all the infinitesimal of the nickel-titanium file are obtained; and all cutting units are assembled, and the geometric parameters of all the cross sections are subjected to secondary adjustment. According to the design method, through discretization of thenickel-titanium file instrument, by means of metal cutting and grinding related thoughts, the multi-disciplinary knowledge such as differential geometry, biomechanics and dental pulp is utilized, parameter optimization is conducted on each unit structure and the overall structure, the problem of instrument separation of the nickel-titanium file instrument in the using process is solved, meanwhile, the high torsion fracture resistance of the nickel-titanium file instrument can be obtained, and accordingly the efficiency and quality of the root canal preparation process are improved.

Description

technical field [0001] The invention belongs to the field of medical device manufacturing, and in particular relates to a design method for a variable-section nickel-titanium root canal file used in root canal preparation. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Root canal preparation refers to the use of rotation and reciprocating motion of specialized surgical instruments to remove diseased dentin in the root canal to form a smooth and tapered root canal, which is one of the key steps in the treatment of pulp disease. Nickel-titanium files are commonly used and the first equipment in the root canal preparation process. Compared with traditional stainless steel i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C5/42A61C19/00G06F30/17G06F30/23G16H50/50G06F111/04G06F119/14
CPCA61C19/00A61C5/42G16H50/50G06F30/17G06F30/23G06F2111/04G06F2119/14
Inventor 王黎明郭伟豪李文祥李剑峰李方义
Owner SHANDONG UNIV
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