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Suspension-stabilized premixed magnesium phosphate-based dental filling material and its preparation method and application

A magnesium phosphate-based dental and filling material technology, used in dental preparations, dentistry, dental prostheses, etc., can solve the problems of long coagulation time, fast hydration reaction speed, and troublesome deployment, and achieves insignificant reaction heating and coagulation time. Long, doctor-friendly effect

Active Publication Date: 2020-02-14
BEIJING C ROOT DENTAL MEDICAL DEVICES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main components of the MTA material are tricalcium silicate and dicalcium silicate, which are similar to Portland cement and can be used in root canal filling materials, but the preparation is cumbersome and wasteful
The Chinese patent "Premixed Biological Hydraulic Cement Paste Composition and Its Application" (Patent No. CN200880011743.1) discloses a premixed cement paste that can be used for medical or dental purposes. Pre-mixing tricalcium silicate, dicalcium silicate and organic solvent is convenient for doctors to use, but the coagulation time is too long, and some need 72 hours to coagulate. Too long coagulation time not only leads to prolonged waiting time for patients, but also makes surgery difficult. more complicated process
The disadvantage is that the calcium phosphate bone cement is not strong enough and easy to break
Years of research have shown that MPC has good biocompatibility and is an ideal material for bone defect repair. However, due to the two problems of too fast hydration reaction speed and extremely large hydration heat release, MPC has not been used for a long time. received enough attention and research
For example, under adiabatic conditions, the maximum hydration temperature of MPC reaches nearly 70°C, and these problems have not been well resolved.

Method used

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  • Suspension-stabilized premixed magnesium phosphate-based dental filling material and its preparation method and application
  • Suspension-stabilized premixed magnesium phosphate-based dental filling material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of Example 1 Suspension Stable Premixed Magnesium Phosphate-based Dental Filling Material 1

[0030] (1) Weigh each raw material according to the following weight percentages: (a) 21% of dead-burned magnesia; (b) 23% of potassium dihydrogen phosphate; (c) 37% of zirconia and (d) 19% of polyethylene glycol;

[0031] (2) Put the components of step (1) into a glass container in turn, mechanically mix with a stainless steel stirring rod, and fully reconcile for 5 minutes;

[0032] (3) Afterwards, the mixed paste is transferred to a medical syringe equipped with an injection hose needle to obtain a suspended and stable premixed magnesium phosphate-based dental filling material.

[0033] The material remains fluid under sealed conditions. Extruded samples are placed in a constant temperature and humidity chamber at 37°C and a humidity above 95% (or filled until the teeth are exposed to physiological fluids), hydration solidifies and hardens, hydration solidifies a...

Embodiment 2

[0034] Preparation of Example 2 Suspension Stable Premixed Magnesium Phosphate-based Dental Filling Material 2

[0035] (1) Weigh each raw material according to the following weight percentage: (a) 9% of light-burned magnesium oxide; (b) 12% of sodium dihydrogen phosphate; (c) 10% of bioglass 63S; (d) anhydrous calcium dihydrogen phosphate 15%; and (e) tantalum oxide 33% (f) polyethylene glycol 21%;

[0036] (2) Put the components of step (1) into a glass container in turn, mechanically mix with a stainless steel stirring rod, and fully reconcile for 5 minutes;

[0037] (3) Afterwards, the mixed paste is transferred to a medical syringe equipped with an injection hose needle to obtain a suspended and stable premixed magnesium phosphate-based dental filling material.

[0038] figure 1 It is a photo of the sample obtained in Example 2. The material remains fluid under sealed conditions, and the extrusion sample is placed in a constant temperature and humidity chamber at 37°C ...

Embodiment 3

[0039] Preparation of Example 3 Suspension Stable Premixed Magnesium Phosphate-based Dental Filling Material 3

[0040] (1) Weigh each raw material according to the following weight percentage: (a) 7% of dead-burned magnesium oxide; (b) 7% of ammonium dihydrogen phosphate; (c) 20% of calcium dihydrogen phosphate; (d) 35% of bismuth trioxide % and (e) glycerol 31%.

[0041] (2) Put the components of step (1) into a glass container in turn, mechanically mix with a stainless steel stirring rod, and fully reconcile for 5 minutes;

[0042](3) Afterwards, the mixed paste is transferred to a medical syringe equipped with an injection hose needle to obtain a suspended and stable premixed magnesium phosphate-based dental filling material.

[0043] The material remains fluid under sealed conditions. Extruded samples are placed in a constant temperature and humidity chamber at 37°C and a humidity above 95% (or filled until the teeth are exposed to physiological fluids), hydrated, solidi...

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PUM

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Abstract

Disclosed are a stably suspended premixed magnesium-phosphate-based dental filling material and the use thereof. Magnesium oxide and at least one phosphate, which act as a main phase, at least one non-aqueous phase solvent, which is miscible with water, and at least one radiation-resistant material are used to prepare a dental filling material which can be injected, wherein the filling material may also comprise at least one type of bioglass. Under sealed conditions, the material is kept as a fluid, and is hydrated, solidified and hardened after same has been filled in a tooth and comes into contact with a physiological fluid. Making use of the good biocompatibility and biological activity of a magnesium-phosphate-based material, same is prepared into a stably suspended premixed magnesium-phosphate-based dental filling material, which can be used as a filling material in fields such as pulp capping, root canal therapy and dental repair.

Description

technical field [0001] The invention relates to a dental filling material and its preparation method and application, in particular to a suspension-stable premixed magnesium phosphate-based dental filling material and its preparation method and application. The invention belongs to the technical field of medical materials. Background technique [0002] Dental filling materials are widely used in dentistry. According to function, it can be divided into dental bonding filling materials, dental restorative filling materials and dental filling materials for protection. The development of dental filling materials has gone through a long process. Many materials such as clove oil zinc oxide, zinc phosphate, silver amalgam, glass cement composite resin, etc. have been used as dental filling materials. An ideal dental filling material must have good biocompatibility, antibacterial properties and clinical operability. In addition, biological activity is used as the basis for measur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K6/838A61K6/836A61K6/15
CPCA61K6/80A61K6/836A61K6/838
Inventor 吴秉民
Owner BEIJING C ROOT DENTAL MEDICAL DEVICES CO LTD
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