Method for surface peening of pure titanium false tooth rack

A technology for surface strengthening and denture, applied in the field of surface strengthening of pure titanium denture brackets, can solve the problems of high price, pigmentation, not widely promoted, etc., and achieve the effect of improving surface strength and low cost

Inactive Publication Date: 2009-09-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface wear resistance of pure titanium is insufficient, and the denture bracket made of it is prone to scratches and pigmentation
At present, the surface treatment of dental denture brackets mostly adopts the method of electroplating precious metals (such as gold), which is expensive, and the wear resistance of gold itself is not enough, so it has not been widely promoted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) According to the design of the removable partial denture model, wax-ups should be made on the parts where the snap ring and connecting body should be placed, and then the pure titanium bracket of the removable partial denture is made through the processes of embedding, wax removal, metal casting, and grinding and polishing.

[0019] (2) Try the removable partial denture bracket in the patient's mouth, and modify the grinding to remove early contact and occlusal interference.

[0020] (3) Stent pretreatment:

[0021] ① Grinding and polishing: remove the oxide layer on the surface of the bracket;

[0022] ②Organic solvent degreasing: ultrasonically clean the polished stent with trichlorethylene;

[0023] ③ Electrochemical degreasing: electrolytic degreasing in dilute NaOH solution;

[0024] ④ acid cleaning: use dilute H 2 SO 4 The solution neutralizes the scaffold and removes alkaline ions;

[0025] ⑤Ultrasonic water washing: remove the acidic ions on the surface...

Embodiment 2

[0033] (1) According to the design of the complete denture model, wax-ups should be made at the parts where the snap ring and connector should be placed, and then the pure titanium bracket for the complete denture is made through the processes of embedding, wax removal, metal melting, and grinding and polishing.

[0034] (3) Stent pretreatment:

[0035] ① Grinding and polishing: remove the oxide layer on the surface of the bracket;

[0036] ②Organic solvent degreasing: ultrasonically clean the polished stent with trichlorethylene;

[0037] ③ Electrochemical degreasing: electrolytic degreasing in dilute NaOH solution;

[0038] ④ acid cleaning: use dilute H 2 SO 4 The solution neutralizes the scaffold and removes alkaline ions;

[0039] ⑤Ultrasonic water washing: remove the acidic ions on the surface of the stent to a certain extent;

[0040] (4) Surface strengthening:

[0041] ①Put the pretreated pure titanium stent obtained in step (3) into an airtight container;

[004...

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PUM

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Abstract

The invention relates to a method for surface peening of a pure titanium false tooth rack. The method comprises the following steps that: the false tooth metal rack is manufactured according to a conventional method, and is subjected to primary grinding and polishing; local detachable false tooth rack is tried on in the mouth of a patient, and is modified, regulated and grinded; the rack is subjected to preprocessing to remove oxides and oil stains on the surface of the rack; the pure titanium rack is put into a closed vessel; the vessel is vacuumized to high vacuum of 10<-1>Pa; nitrogen is introduced into the vessel to ensure that pressure intensity in the vessel reaches 0.9-1.1*10<5>Pa; the false tooth rack is heated to the temperature between 500 and 600 DEG C to lead the surface of the pure titanium rack to react with the nitrogen to generate a titanium nitride film; and steps of tooth arranging, box packing and plastic filling are completed on the false tooth pure titanium rack which is subjected to the surface peening until the false tooth is completed.

Description

technical field [0001] The invention relates to a method for strengthening the surface of a pure titanium denture bracket. Background technique [0002] Pure titanium has the advantages of good biocompatibility and low density. Denture brackets made of pure titanium are light in weight, small in thickness, and comfortable to wear, so they are highly praised by dentists and patients. However, the surface wear resistance of pure titanium is insufficient, and the denture bracket made of it is prone to scratches and pigmentation. At present, the surface treatment of dental denture brackets mostly adopts the method of electroplating precious metals (such as gold), which is expensive, and the wear resistance of gold itself is not enough, so it has not been widely promoted. [0003] The titanium nitride (TiN) film formed on the surface of the pure titanium bracket has the characteristics of extremely stable chemical properties, low toxicity, wear resistance, high hardness, etc., ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C13/12
Inventor 苏俭生韩雯斐
Owner TONGJI UNIV
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