Preparation method of glass ionomer cement for orthodontic bonding

A cement and bonding technology, which is used in dental preparations, pharmaceutical formulations, pharmaceutical sciences, etc., can solve the problems of low strength, easy breakage, poor wear resistance, etc., and achieve improved strength, no chipping, and wear resistance. Good results

Inactive Publication Date: 2017-02-15
张静
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: Aiming at the drawbacks of current glass ionomer cements, such as poor wear resistance, low strength and easy fracture, a kind of fresh bovine bone is provided as raw material, which is washed and cooked to remove the surface meat and fascia. , then dried, pulverized, calcined, and ball milled to obtain natural hydroxyapatite powder, and then the glass flakes were taken, and the surface of the glass flakes was roughened with hydrofluoric acid, and then passed through zirconia and silane coupling agent KH-570 The method of chemically modifying its surface to improve its wear resistance and mechanical strength, and finally mixed with natural hydroxyapatite powder to make glass ionomer cement effectively solves the problem of poor wear resistance of traditional glass ionomer cement. low intensity problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First weigh 5kg of fresh beef bones, wash the beef bones with deionized water for 3 times, put the washed beef bones and 3L of deionized water into a pressure cooker and boil for 3 hours, take out the beef bones after cooling to room temperature, and scrape them off with a steel knife After the meat and fascia on the surface of the beef bone, put it in a blast drying oven, and dry it to a constant weight at 105°C, then put the dried beef bone into a grinder and grind it, and pass it through a 60-mesh sieve to obtain pretreated beef. Bone granules; then weigh 100g of the above-mentioned pretreated bovine bone granules, put them into a muffle furnace, calcinate at 600°C for 1h, cool to room temperature, transfer the calcined product to a ball mill, and ball mill at 300r / min for 30min, Pass through a 200-mesh sieve to obtain natural hydroxyapatite powder for later use; then weigh 10g of glass flakes, soak them in 150mL of deionized water for 20min, then add 5mL of hydrofluo...

example 2

[0020]First weigh 7kg of fresh bovine bones, wash the bovine bones with deionized water 4 times, put the washed bovine bones and 4L of deionized water into a pressure cooker and boil for 4 hours, take out the bovine bones after cooling to room temperature, and scrape them off with a steel knife After the meat and fascia on the surface of the beef bone, put it in a blast drying oven, and dry it to a constant weight at 108°C, then put the dried beef bone into a grinder and grind it, and pass it through a 60-mesh sieve to obtain pretreated beef. Bone granules; then weigh 150g of the above-mentioned pretreated bovine bone granules, put them into a muffle furnace, calcinate at 650°C for 2h, cool to room temperature, transfer the calcined product to a ball mill, and ball mill at 350r / min for 35min, Pass through a 200-mesh sieve to obtain natural hydroxyapatite powder, and set aside; then weigh 15g of glass flakes, soak them in 225mL of deionized water for 25min, then add 8mL of hydro...

example 3

[0023] First weigh 8kg of fresh beef bone, wash the beef bone with deionized water for 5 times, put the washed beef bone and 5L of deionized water into a pressure cooker and boil for 5 hours, take out the beef bone after cooling to room temperature, and scrape off with a steel knife After the meat and fascia on the surface of the beef bone, put it in a blast drying oven, and dry it to a constant weight at 110°C, then put the dried beef bone into a grinder and grind it, and pass it through a 60-mesh sieve to obtain pretreated beef. Bone granules; then weigh 200g of the above-mentioned pretreated bovine bone granules, put them into a muffle furnace, calcinate at 700°C for 2h, cool to room temperature, transfer the calcined product to a ball mill, and ball mill at 400r / min for 40min, Pass through a 200-mesh sieve to obtain natural hydroxyapatite powder, and set aside; then weigh 20g of glass flakes, soak them in 300mL of deionized water for 30min, then add 10mL of hydrofluoric aci...

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Abstract

The invention discloses a preparation method of glass ionomer cement for orthodontic bonding, and belongs to the technical field of glass ionomer cement preparation. According to the method, fresh beef bones are used as raw materials and are washed, steamed and boiled; surface beef and fascia are removed; then, the beef bones are subjected to drying, crushing, roasting and ball milling to be prepared into natural hydroxyapatite powder; then, a glass flake is taken; the surface of the glass flake is subjected to roughening treatment by hydrofluoric acid; next, the surface is subjected to chemical modification by zirconium oxide and silane coupling agents KH-570; the wear-resistant performance and the mechanical intensity are improved; finally, the treated glass flake is subjected to mixing and ball milling with the natural hydroxyapatite powder and the like to prepare the glass ionomer cement. The preparation method has the beneficial effects that the preparation steps are simple; the obtained glass ionomer cement has high intensity; the intensity is improved by 23 to 26 percent through being compared with that of other cementing mediums; the wear-resistant performance is good; after the use, the bonding force with enamel is high; no breaking or cracking phenomena occur.

Description

technical field [0001] The invention relates to a method for preparing a glass ionomer cement for orthodontic bonding, and belongs to the technical field of glass ionomer cement preparation. Background technique [0002] Glass ionomer cement is a double-paste product, mainly composed of filler (glass powder, etc.), water and 2-hydroxyethyl methacrylic acid (polyacid, tartaric acid, etc.). The mechanism of the cement is that the aluminum silicate fluoride glass particles in the powder interact with the H ions in the liquid polyacrylic acid to dissolve the surface, and the calcium, aluminum, sodium, etc. Calcium, aluminum and other cations in the glass ionomer powder undergo a complex reaction with the carboxyl group in polyacrylic acid to form a complex, and fluorine exists in the matrix. The material has good chemical bonding effect on teeth, and is less irritating to dental pulp. It is widely used in clinical stomatology for filling, bonding, and frozen base lining. The mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/033A61K6/083A61K6/027A61K6/00A61K6/838
CPCA61K6/30A61K6/831A61K6/838A61K6/887C08L33/02
Inventor 张静邹宇帆宋豪
Owner 张静
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