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Calcium phosphate composite material for filling root canal and preparation method thereof

A composite material, calcium and magnesium phosphate technology, used in dental preparations, dentistry, dental prostheses, etc., can solve the problems of difficult ingrowth of new bone, slow degradation, irregular root canal shape, etc. The effect of improving collapse resistance and promoting bond strength

Active Publication Date: 2013-06-12
厦门百美特生物材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been clinically found that the material has a long curing time and poor collapse resistance. It is prone to scatter when encountering blood, and the injection performance is not ideal.
In addition, it is very difficult to inject the material, and the shape of the root canal is irregular, especially when the root canal is flat, it cannot guarantee that the material reaches the apex, and it is easy to cause underfilling, which limits its clinical application to a certain extent

Method used

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  • Calcium phosphate composite material for filling root canal and preparation method thereof
  • Calcium phosphate composite material for filling root canal and preparation method thereof
  • Calcium phosphate composite material for filling root canal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh 5.0g α-tricalcium phosphate, 2.0g tetracalcium phosphate, 1.0g magnesium oxide, 1.5g potassium dihydrogen phosphate, 0.5g iodoform, the particle size is less than 20μm, and mix uniformly to form a solid phase powder. Weigh 2.0 g of sodium dihydrogen phosphate, 0.5 g of sucrose, and 0.5 g of glucose and fully dissolve them in 10 ml of 0.5 mol / L citric acid solution to obtain a solidified liquid in the liquid phase. Pour the solidification liquid into the solid phase powder at a liquid-solid ratio of 0.3ml: 1mg, and mix it evenly in a syringe to obtain a filling material.

Embodiment 2

[0045] Weigh 6.0g of α-tricalcium phosphate, 1.5g of magnesium oxide, 1.5g of potassium dihydrogen phosphate, and 1.0g of iodoform, the particle size of which is less than 20 μm, and mix them uniformly to form a solid phase powder. Weigh 1.0 g of disodium hydrogen phosphate, 1.0 g of sodium dihydrogen phosphate, and 0.8 g of glucose and fully dissolve them in 10 ml of 0.6 mol / L citric acid solution to obtain a solidified liquid in the liquid phase. Pour the solidified liquid into the solid phase powder at a liquid-solid ratio of 0.4ml: 1mg, and mix it evenly in the vessel to obtain the filling material. Example 3:

Embodiment 3

[0046] Weigh 8.0g of α-tricalcium phosphate, 1.0g of magnesium oxide, and 1.0g of iodoform, the particle size of which is less than 20μm, and mix them uniformly to form a solid phase powder. Weigh 2 g of potassium dihydrogen phosphate and 1.0 g of dextrin and fully dissolve them in 10 ml of 1.0 mol / L citric acid solution to obtain a solidified liquid in the liquid phase. Pour the solidified liquid into the solid phase powder at a liquid-solid ratio of 0.5ml: 1mg, and mix it evenly in the vessel to obtain the filling material.

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Abstract

The invention provides a calcium phosphate composite material for filling a root canal. The composite material consists of a solid-phase component and a liquid-phase component, wherein the solid-phase component is a mixture of calcium phosphate, magnesium oxide, soluble hydrophosphate and iodoform; and the liquid-phase component is an aqueous solution of sugar, hydrophosphate and citric acid. The invention also provides a method for preparing the composite material. In the composite material, the injection property and collapse resistance of the composite material can be improved by the gelation of the sugar in the liquid-phase component and the chelation of inorganic ions in the solid-phase component, the magnesium phosphate generated by a hydration reaction has relatively strong adhesive force, the bonding strength between the root filling material and the root canal wall can be promoted, and leakage is avoided; and the iodoform can be used for enhancing the X-ray opacity and diminish inflammation to improve the curative effect of root canal therapy.

Description

【Technical field】 [0001] The invention relates to the field of biomedical filling materials, in particular to a calcium magnesium phosphate composite material for root canal filling and a method for preparing the composite material. 【Background technique】 [0002] Root canal therapy is currently the most fundamental and effective method for treating pulp disease and periapical disease, and the success or failure of the treatment mainly depends on the root canal filling material. [0003] Root canal filling materials currently used clinically can be mainly divided into three types of root canal filling materials: solid, paste and liquid. [0004] Solid root canal filling materials (such as gutta-percha tips, titanium-nickel alloy tips, silver tips, plastic tips, etc.) are non-adhesive and cannot be bonded to the internal structure of the root canal, cannot enter curved root canals and side accessory root canals, and cannot To form a tight seal, gutta-percha tips must be used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/097A61K6/033A61K6/027A61K6/02A61K6/838A61K6/898
Inventor 戴红莲
Owner 厦门百美特生物材料科技有限公司
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