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Dental/surgical sealants including shapeable particles

A sealant and dental technology, applied in dental preparations, surgical adhesives, dentistry, etc., can solve the problems of weakening mechanical properties, bacterial invasion, etc., and achieve the effect of eliminating gas cavities

Inactive Publication Date: 2007-07-11
DRFP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may weaken or inhibit mechanical properties and allow bacterial ingress

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Epoxy amine sealant AH Plus TM Available from Dentsply Corporation. Mix equal volumes of the two paste components with equal volumes of MMA and VP copolymer particles. The equilibrium water absorption of the material is about 75%. A smooth paste was formed, which was then shaped into rods 10 mm long and about 3 mm in diameter. Hydrate the rods in distilled water. After about 8 hours of hydration, the sealant composition exhibited a volume increase of about 113%.

[0045] The sealant composition of Example 1 was filled into the treated teeth with a No. 40 Gutta Percha gutta-percha tip. The teeth are hydrated in water for 3 days and then placed in a water-based stain. The experiment was repeated using AH Plus sealant as a control. It was found that teeth treated with the compositions of the present invention showed a marked reduction in the breakthrough of the dye.

[0046] Teeth prepared as described above were incised and placed in a water-based stain for 7 days....

Embodiment 2

[0049] A sealant composition was prepared according to Example 1 and mixed with an equal volume of radiopaque poly(hydroxyethyl methacrylate) spheres according to Horak et al, Biomaterials (1998) 19:1303-1307. Method preparation. The sealant composition is then tested for radiopacity using conventional X-ray equipment. The composition was confirmed to be radiopaque.

Embodiment 3

[0051] A two-component amine-epoxy resin (Araldite Precision) supplied by Bostik Findley Limited was mixed with about 25% by weight of the MMA / VP cross-linked copolymer described in Example 1 . The resulting paste was shaped into 10 mm long rods as described in Example 1. The rods were hydrated in distilled water immediately after molding. After 24 hours of hydration, the sealant composition exhibited a weight gain of approximately 31%. After 48 hours of hydration, the weight gain was approximately 36%, improving to 39% after 144 hours.

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Abstract

A sealant composition, suitable for surgical or dental use, comprises a sealant and, dispersed therein, one or more particles of a material which is prestressed and / or capable of undergoing expansion or contraction.

Description

technical field [0001] The present invention relates to a sealant composition suitable for surgical or dental applications. Background technique [0002] Surgical and dental sealants generally consist of polymerizable binders reinforced with inert organic or inorganic filler particles. Also known are glass ionomer cements. However, such cements have limited physical strength, making them unsuitable for surfaces subject to high physical stress. [0003] Dental sealants are often used in conjunction with dental insert plugs. The filler is inserted into the cavity and the gap left between the cavity wall and the filler is filled with a sealant. [0004] A recurring problem with dental sealants is their inability to provide sufficient bond strength at the sealant / dentine interface, leading to dislodgement and bacterial intrusion. Conventional sealants are generally hydrophobic, which creates a poor interface with the inherently hydrophilic tooth tissue. Also, the properties...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L24/00A61K6/891
CPCA61L24/0094A61L24/001A61L24/04A61L24/00A61L24/02
Inventor P·S·霍尔登A·E·希思
Owner DRFP HLDG LTD