Method for quickly producing removalbe partial denture bracket

A rapid and denture technology, applied in medical science, dental prosthesis, dentistry, etc., can solve the problems of irreversible deformation, irregularity, and scrapping of parts, so as to reduce the formation of internal stress in the workpiece, reduce manufacturing costs, and shorten the manufacturing cycle. Effect

Active Publication Date: 2009-04-08
TECH LASER TECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the superplastic molding process, due to the incomplete fit between the mold and the processed material, and due to the influence of thermal expansion during the forming process and the difference in the thickness distribution of the inflated molded parts, there is a large error in the size of the bracket.
To sum up, the above-mentioned processes have some common disadvantages: all need to make molds, the entire manufacturing process is cumbersome and irregular, the cycle is long, the cost is high, and quality problems often occur
The shape of the denture bracket is complex and the

Method used

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  • Method for quickly producing removalbe partial denture bracket
  • Method for quickly producing removalbe partial denture bracket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Selective Laser Melting Rapid Fabrication of Stainless Steel Removable Partial Denture Frames

[0027] refer to figure 1 and figure 2 graphics. Will figure 2 The 3D part model with saw-toothed thin-wall support added is saved as an STL format file, and layered slicing software is used for layered discretization to generate laser processing CNC instructions. A continuous YAG laser was used to make denture brackets with stainless steel alloy powder with a particle size of <45 μm. A 25 mm thick stainless steel plate was used as the substrate. The thickness of the powder was 60 μm, the speed of powder spreading was 3.0 m / min, and the height of each drop of the forming cylinder was 20 μm.

[0028] The laser processing parameters of the first layer are: laser power 150W, scanning speed 50mm / s, overlap amount 0.01mm. The laser processing parameters of the subsequent layer are: laser power 130W, scanning speed 250mm / s, overlapping amount 0.04mm.

[0029] After...

Embodiment 2

[0030] Example 2: Rapid Fabrication of Cobalt-Chromium Alloy Removable Partial Denture Brackets by Selective Laser Melting

[0031] refer to figure 1 and figure 2 graphics. Will figure 2The 3D part model with saw-toothed thin-wall support added is saved as an STL format file, and layered slicing software is used for layered discretization to generate laser processing CNC instructions. A continuous semiconductor pumped solid-state laser is selected, and the material for making the denture bracket is cobalt-chromium alloy powder with a particle size of <40 μm. The stainless steel plate with a thickness of 30 mm is used as the substrate, and the thickness of the powder is 40 μm. The drop height is 20 μm, and the production process is protected by high-purity argon.

[0032] The laser processing parameters of the first layer are: laser power 150W, scanning speed 150mm / s, overlap amount 0.02mm. The laser processing parameters of the subsequent layer are: laser power 150W, sc...

Embodiment 3

[0034] Example 3: Rapid Manufacturing of Titanium Alloy Removable Partial Denture Brackets by Selective Laser Melting

[0035] refer to figure 1 and figure 2 graphics. Will figure 2 The 3D part model with saw-toothed thin-wall support added is saved as an STL format file, and layered slicing software is used for layered discretization to generate laser processing CNC instructions. The continuous Yb fiber laser is selected, and the material for making the denture bracket is Ti-6Al-4V alloy powder with a particle size of less than 20 μm. The titanium plate with a thickness of 40 mm is used as the substrate, and the thickness of the powder is 20 μm. The drop height is 20 μm, and the production process is protected by high-purity argon.

[0036] The laser processing parameters of the first layer are: laser power 160W, scanning speed 150mm / s, overlap amount 0.03mm. The laser processing parameters of the subsequent layer are: laser power 140W, scanning speed 800mm / s, overlapp...

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Abstract

The invention discloses a process for quickly manufacturing a removable partial denture bracket by laser, which mainly comprises the following steps: acquiring a three-dimensional part model of a tooth jaw of a patient, adding an indented thin-wall support to the model, layering and dispersing to generate laser processing numerical control instructions, and paving powder on a preheated and insulated metal substrate; and then using a continuous YAG or fiber laser with the beam quality M<2> is smaller than 1.1 to melt metal or alloy powder in a special granularity range layer by layer by using optimized powder paving thickness, falling height of a forming cylinder and a laser processing technique under a focusing light spot of 10 to 100 mu m, and finishing melting, accumulating and processing of the whole part; and finally carrying out tempering heat treatment on the formed part, to obtain the removable partial deture bracket, which combines metallurgy and has a tissue density close to 100 percent. The process can overcome the difficulty of the prior art, and directly manufacture the removable partial denture bracket which has the advantages of high precision and high surface smoothness, no deformation and excellent mechanical property.

Description

technical field [0001] The invention belongs to the field of manufacture of stomatological restorations, in particular to a method for rapidly manufacturing removable partial denture brackets by selective laser melting technology. Background technique [0002] Dentition defect is a common and frequently-occurring disease in stomatology, accounting for about 24% to 53% of the natural population. Bracket-type removable dentures are one of the ideal and preferred restoration methods for patients with dentition defects due to their relatively low price and convenient and comfortable wearing. There are two types of materials for making denture brackets, metal and plastic. Metal brackets are obviously superior to plastic brackets in terms of mechanical properties. They will not be deformed or broken after long-term use in the oral cavity, and metal brackets are thinner under the premise of ensuring performance. more comfortable. Therefore, the design and manufacturing method of ...

Claims

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Application Information

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IPC IPC(8): A61C13/12
Inventor 曾晓雁王泽敏陈光霞胡乾午关凯
Owner TECH LASER TECH SHANGHAI CO LTD
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