Biodegradable implant and method for manufacturing same

Abstract

This invention relates to a biodegradable implant including magnesium, wherein the magnesium contains, as impurities, (i) manganese (Mn); and (ii) one selected from the group consisting of iron (Fe), nickel (Ni) and mixtures of iron (Fe) and nickel (Ni), wherein the impurities satisfy the following condition: 0</(i)≦5, and an amount of the impurities is 1 part by weight or less but exceeding 0 parts by weight based on 100 parts by weight of the magnesium, and to a method of manufacturing the same.

1 . A biodegradable implant comprising magnesium, wherein the magnesium contains as impurities:
 (i) manganese (Mn); and   (ii) one selected from the group consisting of iron (Fe), nickel (Ni) and mixtures of iron (Fe) and nickel (Ni),   wherein the impurities satisfy the following condition: 0<(ii)/(i)≦5, and an amount of the impurities is 1 part by weight or less but exceeding 0 parts by weight based on 100 parts by weight of the magnesium.   
     
     
         2 . The biodegradable implant of  claim 1 , wherein the impurities satisfy the following condition: 0<(ii)/(i)≦0.5. 
     
     
         3 . (canceled) 
     
     
         4 . The biodegradable implant of  claim 1 , wherein the magnesium is charged in pores of a porous structure. 
     
     
         5 .- 7 . (canceled) 
     
     
         8 . The biodegradable implant of  claim 4 , wherein the porous structure comprises one or more selected from the group consisting of a metal, a ceramic and a polymer. 
     
     
         9 .- 11 . (canceled) 
     
     
         12 . The biodegradable implant of  claim 1 , which is used for one or more selected from the group consisting of orthopedics, dental care, plastic surgery and blood vessels. 
     
     
         13 . A method of manufacturing a biodegradable implant, comprising:
 a) providing magnesium containing as impurities (i) manganese (Mn) and (ii) one selected from the group consisting of iron (Fe), nickel (Ni) and mixtures of iron (Fe) and nickel (Ni), wherein the impurities satisfy the following condition: 0<(ii)/(i)≦5, and an amount of the impurities is 1 part by weight or less but exceeding 0 parts by weight based on 100 parts by weight of the magnesium; and   b) forming the magnesium.   
     
     
         14 . The method of  claim 13 , wherein a) comprises:
 a-1) preparing a porous structure; and   a-2) filling pores of the porous structure with the magnesium.   
     
     
         15 . (canceled) 
     
     
         16 . A biodegradable implant, comprising a magnesium alloy represented by Chemical Formula 1 below comprising based on total weight thereof, 23 wt % or less but exceeding 0 wt % of Ca; 10 wt % or less but exceeding 0 wt % of X; and a remainder of Mg:
   Mg—Ca—X  <Chemical Formula 1>
   wherein X is Mn or Zn.   
     
     
         17 . The biodegradable implant of  claim 16 , wherein the magnesium alloy comprises, based on the total weight thereof, 23 wt % or less but exceeding 0 wt % of Ca; 0.1˜5 wt % of X; and the remainder of Mg. 
     
     
         18 . (canceled) 
     
     
         19 . The biodegradable implant of  claim 16 , wherein the magnesium alloy is charged in pores of a porous structure. 
     
     
         20 .- 24 . (canceled) 
     
     
         25 . The biodegradable implant of  claim 16 , which is used for one selected from the group consisting of orthopedics, dental care, plastic surgery and blood vessels. 
     
     
         26 . A method of manufacturing a biodegradable implant, comprising:
 i) providing a magnesium alloy represented by Chemical Formula 1 below comprising based on total weight thereof, less than 23 wt % but exceeding 0 wt % of Ca, less than 10 wt % but exceeding 0 wt % of X, and a remainder of Mg; and   ii) forming the magnesium alloy:
   Mg—Ca—X  <Chemical Formula 1>
 
   wherein X is Mn or Zn.   
     
     
         27 . The method of  claim 26 , wherein i) comprises:
 i-1) preparing a porous structure; and   i-2) filling pores of the porous structure with the magnesium alloy.   
     
     
         28 . (canceled) 
     
     
         29 . A method of manufacturing a biodegradable implant, comprising applying ultrasound to the biodegradable implant comprising magnesium. 
     
     
         30 . The method of  claim 29 , wherein the biodegradable implant comprising magnesium is a porous structure. 
     
     
         31 .- 35 . (canceled) 
     
     
         36 . A biodegradable implant, comprising based on total weight thereof:
 90 wt % or less but exceeding 0 wt % of magnesium oxide (MgO); and   10 wt % to less than 100 wt % of a metal comprising magnesium.