Design method, system and preparation of a variable-section nickel-titanium root canal file for root canal preparation
A design system and design method 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, achieve improved file cutting force, perfect theoretical support, The effect of improving the ability to resist torsional fracture
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[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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