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Coated tissue expander

A dilator, tissue technology, applied in dilator, medical science, surgery, etc.

Inactive Publication Date: 2016-04-06
OXTOX LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] While the structure described above provides some degree of control over time delay and expansion rate, it was found that further control was required to provide acceptable product

Method used

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  • Coated tissue expander
  • Coated tissue expander
  • Coated tissue expander

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0039] The present invention can use self-swelling polymer gels. The self-expanding polymer network of the present invention may be based on a hydrophilic polymer network that can absorb water but does not dissolve. The hydrophilic properties are provided by functional groups on the polymer, such as hydroxyl, carboxyl or amide functional groups. Preferably, the self-expanding polymer network contains at least one containing -COOH,> C=0, -OH or -NH 2 基的monomers. Solubility resistance is the result of the presence of structural crosslinks, crystalline regions or entanglements. This material is typically called "hydrogel". Hydrogels contain two components, a constant number of polymer networks (ie gels) and a variable water component. In the anhydrous state (before insertion), the material is often called a xerogel. Anhydrous materials are hygroscopic and absorb / adsorb water from their local environment to hydrate the network. The self-expanding polymer network can expand to ...

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PUM

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Abstract

The present invention provides a tissue expander (10) comprising a self-inflating core (12) having a non-inflated state and an inflated state and a coating (14) surrounding said core (12), in which said core (12) comprises a compacted material having a central portion (16) of a first, higher, (average) density D and a peripheral portion (18) of a second, lower, (average) density d, a border (19) between said central portion (16) and said peripheral portion (18) and wherein said coating (14) includes a plurality of first and / or second apertures (20, 22) through said coating (14). It also provides a method of manufacturing the tissue expander (10). The arrangement is such as to allow for the controlled ingress of water into the expandable core (12) which allows for the control of the delay before expansion and the rate of expansion once initiated.

Description

Technical field [0001] The present invention relates to expandable components, and particularly but not exclusively to components known as tissue expanders. Such dilators can be used by doctors, veterinarians, and dental personnel to produce expansion of the patient's tissue prior to corrective or supplementary surgery and usually have a controlled rate of expansion and can also be configured with delayed expansion capabilities. Background technique [0002] Currently, tissue expanders are a key component of reconstructive plastic surgery and are used, for example, for the treatment of congenital malformations and acquired defects. [0003] EP10776126 describes a known form of tissue expander, and it can be understood from it that they usually contain a material that is compressed after drying, which will expand when rehydrated to regain any height loss during compression. The expansion rate is controlled by applying a biodegradable coating to the expandable material. When inserte...

Claims

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Application Information

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IPC IPC(8): A61B90/00
CPCA61B90/02A61F2/10A61F2/12A61L27/52A61B2017/00792A61B2017/00898A61B2017/00942A61B2017/00526A61M29/02
Inventor D·E·杰克逊
Owner OXTOX LIMITED