Absorbable iron-based instrument
AssigneeLifetech Scientific (Shenzhen) Co., Ltd.
InventorsHongtao Sun, Deyuan Zhang, Jun Hu, Liping Chen
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Abstract
An absorbable iron-based instrument is provided having an iron-based substrate, a zinc-containing protector in contact with the iron-based substrate, and a degradable polyester in contact with the iron-based substrate and/or the zinc-containing protector. The range of the ratio of the mass of the zinc-containing protector to the mass of the iron-based substrate is 1:200 to 1:2. In the degradable polyester, the mass fraction of a low-molecular-weight part with a molecular weight of less than 10,000 is less than or equal to 5%; alternatively, in the degradable polyester, the mass fraction of a residual monomer is less than or equal to 2%.
Claims10
An absorbable iron-based device, comprising an iron-based substrate, a zinc-containing protector that completely covers the iron-based substrate, and a degradable polyester in contact with the iron-based substrate and/or the zinc-containing protector, wherein the ratio of the mass of the zinc-containing protector to the mass of the iron-based substrate ranges between 1:200 and 1:2;
- and wherein the degradable polyester is poly-D,L-lactic acid having a molecular weight less than 10,000, a mass fraction of 2 percent and a residual monomer having a mass fraction of 1.6 percent.
Dependencies are inferred from the claim text.