Delivery system for bone growth promoting material
First Claim
1. A moisture activated implant device for placement into a tooth extraction site or other bone defect and promoting bone growth in the bone defect, comprising:
- a dry covering comprised of a water absorbing gelatinizable material that defines an enclosed space, wherein the dry covering consists essentially of oxidized cellulose; and
a bone growth promoting material, disposed within the enclosed space defined by the dry covering, selected from the group consisting of hydroxyapatite, beta-tricalcium phosphate, purified coral shell, freeze dried natural bone powder, freeze dried natural bone particles, demineralized natural bone powder, demineralized natural bone particles, demineralized natural bone shards, demineralized natural bone fragments, and combinations thereof,wherein the dry covering encapsulates and retains the bone growth promoting material within the enclosed space prior to use and becomes gelatinous and adhesive upon contact with water so as to retain the bone growth promoting material within a tooth extraction site or other bone defect during use.
1 Assignment
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Accused Products
Abstract
A delivery system that includes a bone growth promoting material encapsulated within a water absorptive gelatinizable covering is used to promote bone growth in order to repair a bone defect and/or strengthen a weakened bone region. The delivery system may be shaped and sized in order to fit within a bleeding wound (e.g. one that is formed in the gingiva when a tooth is extracted). The covering may be formed of a gelatinizable gauze that forms a gel-like material when moistened with water. The delivery system is contained within a moisture resistant package prior to use. Alternatively, the delivery system comprises a bone growth promoting material and thickening agent contained within a syringe that, upon adding water, form a viscous gel or stiff putty.
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Citations
18 Claims
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1. A moisture activated implant device for placement into a tooth extraction site or other bone defect and promoting bone growth in the bone defect, comprising:
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a dry covering comprised of a water absorbing gelatinizable material that defines an enclosed space, wherein the dry covering consists essentially of oxidized cellulose; and a bone growth promoting material, disposed within the enclosed space defined by the dry covering, selected from the group consisting of hydroxyapatite, beta-tricalcium phosphate, purified coral shell, freeze dried natural bone powder, freeze dried natural bone particles, demineralized natural bone powder, demineralized natural bone particles, demineralized natural bone shards, demineralized natural bone fragments, and combinations thereof, wherein the dry covering encapsulates and retains the bone growth promoting material within the enclosed space prior to use and becomes gelatinous and adhesive upon contact with water so as to retain the bone growth promoting material within a tooth extraction site or other bone defect during use. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A moisture activated implant device for placement into a tooth extraction site or other bone defect and promoting bone growth in the bone defect, comprising:
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a dry covering comprised of a water absorbing gelatinizable material that defines an enclosed space, wherein the dry covering consists essentially of oxidized cellulose; a bone growth promoting material in granule or powder form disposed within the enclosed space defined by the dry covering, wherein the bone growth promoting material comprises hydroxyapatite, beta-tricalcium phosphate, purified coral shell, natural bone, demineralized natural bone, or a combination thereof; and a thickener dispersed among the bone growth promoting material, the thickener comprising a material that forms a viscous gel or firm putty upon contact with water, wherein the dry covering encapsulates and retains the bone growth promoting material within the enclosed space prior to use and becomes gelatinous and adhesive upon contact with water so as to retain the bone growth promoting material within a tooth extraction site or other bone defect during use. - View Dependent Claims (15, 16, 17, 18)
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Specification