Method for preparing rehabilitation die for oral cavity

A technology for oral prostheses and conditioners, which is applied in pharmaceutical formulations, dental preparations, compression mold cups, etc., can solve the problems of difficult coating thickness, change in the consistency of gap materials, and volatile diluents, etc., to improve the compressive strength, The effect of suppressing crystal growth and being less prone to breakage

Inactive Publication Date: 2008-12-17
SHANGHAI MEDICAL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of making the model, due to the difference in the proficiency of the operators, especially because the diluent of the gap material is volatile, the consistency of the gap material often changes, making it difficult to control the thickness of the coating, which ultimately affects the suitability of the restoration.
In addition, the dies made of traditional die materials often cause changes in the size of the model with changes in storage time, air temperature and humidity, and also easily affect the accuracy of the restoration.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Hemihydrate gypsum 100 parts

[0016] Swelling regulator (polyvinyl alcohol, polyethylene glycol, lauryl alcohol, gum arabic) in 1.55 parts

[0017] Among them: 0.6 parts of polyvinyl alcohol

[0018] Polyethylene glycol 0.15 parts

[0019] Lauryl alcohol 0.58 parts

[0020] Gum Arabic 0.22 parts

[0021] 23 parts of water

[0022] Mix the above components for 2-3 minutes and pour the test piece. According to the standard test method of gypsum setting time and swelling, the setting time is 16 minutes, and the swelling amount is 0.51%. After 2 hours, measure its compressive strength The strength can reach 33Mpa.

Embodiment 2

[0024] Hemihydrate gypsum 100 parts

[0025] Swelling regulator (polyethylene glycol, bone glue, gelatin, pectin) in 2.4 parts

[0026] Among them: polyethylene glycol 1.2 parts

[0027] Bone glue 0.55 parts

[0028] 0.4 parts of gelatin

[0029] 0.25 pectin

[0030] 25 parts of water

[0031] Mix the above components for 2-3 minutes and pour the test piece. According to the standard test method of gypsum setting time and swelling, the setting time is 19 minutes, and the swelling amount is 0.55%. After 2 hours, measure its compressive strength The strength can reach 35Mpa.

Embodiment 3

[0033] Hemihydrate gypsum 100 parts

[0034] Swelling regulator (polyethylene glycol, lauryl alcohol, gum arabic, agar) in 1.23 parts

[0035] Among them: 0.45 parts of polyethylene glycol

[0036] Lauryl alcohol 0.28 parts

[0037] Gum Arabic 0.39 parts

[0038] Agar 0.11 parts

[0039] 22 parts of water

[0040] Mix the above components for 2-3 minutes and pour the test piece. According to the standard test method of gypsum setting time and swelling rate, the setting time is 11 minutes, and the swelling amount is 0.49%. After 2 hours, measure its resistance. The compressive strength can reach 34Mpa.

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Abstract

A process for preparing the oral-cavity repairing model of oral reparing body includes proportionally mixing semi-hydrated gypsum, coagulation-expansion regulator and water, stirring for 2-3 min, and casting. Its advantages are high adaptability and strength and good memory characteristic.

Description

Technical field: [0001] The invention relates to the preparation of dental materials, in particular to a preparation method of an oral all-ceramic prosthetic model. Background technique: [0002] In modern oral restorative treatment, all-ceramic crown and bridge restoration materials have become a main restoration method. The success of the restoration mainly depends on the suitability, strength and aesthetics of the restoration. Therefore, fit becomes the primary factor in evaluating restorations. In the existing treatment process, after the clinician prepares the tooth, the impression is taken with silicone rubber or alginate, and the model is reproduced with nearly zero-expansion anhydrite. The space reserved for the adhesive between the teeth needs to be coated with plastic interstitial material on the surface of the model, and then the negative model is made with silicone rubber and the replica is made with superhard plaster. In actual operation, gap materials are of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K6/027A61K6/08A61K6/884
Inventor 廖运茂杨禾沈曦
Owner SHANGHAI MEDICAL INSTR
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