# US 2016/0256208 A1 · Implant, a method for production thereof and use thereof

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- Number: US 2016/0256208 A1
- Document ID: US20160256208A1
- Status: Published application
- Kind: A1
- Application number: 15/026,966
- Filed: 2014-10-03
- Published: 2016-09-08
- Earliest claimed: 2013-10-03
- Inventors: Annelie-Martina Weinberg
- Web page: https://patentgrep.com/patent/US20160256208A1

## CPC

- A61B 17/866: {Material or manufacture}
- A61B 17/72: Intramedullary devices, e.g. pins or nails
- A61B 17/842: {Flexible wires, bands or straps (A61B17/72, A61B17/82, A61B17/86 take precedence)}
- A61L 27/047: {Other specific metals or alloys not covered by A61L27/042 - A61L27/045 or A61L27/06}
- A61L 27/58: Materials at least partially resorbable by the body
- A61L 31/022: {Metals or alloys}
- A61L 31/148: {Materials at least partially resorbable by the body}
- C22C 23/00: Alloys based on magnesium
- C22C 23/04: with zinc or cadmium as the next major constituent
- C22F 1/06: of magnesium or alloys based thereon
- A61B 17/84: Fasteners therefor {or fasteners being internal fixation devices}
- A61L 2430/02: for reconstruction of bones; weight-bearing implants
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- C22F: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass, C23F17/00)

## Abstract

An implant, a method for production thereof, and use thereof for growing patients are disclosed, containing a Mg—Zn—Ca-based alloy. In order to meet extremely strict requirements with regard to compatibility, chemical resistance, and mechanical strength, it is proposed that the alloy contain 0.1 to 0.6 wt % zinc (Zn), 0.2 to 0.6 wt % calcium (Ca), and a remainder of magnesium (Mg), as well as impurities that are an inevitable part of the manufacturing process, which each total no more than 0.01 wt % and altogether total at most 0.1 wt %, with the quotient of the percentages by weight of Zn and Ca being less than or equal to 1.

## Claims

### Claim 1

An implant for growing patients containing a Mg—Zn—Ca-based alloy, the alloy comprising:
0.1 to 0.6 wt % zinc (Zn),
0.2 to 0.6 wt % calcium (Ca),
and a remainder of magnesium (Mg), as well as impurities that are an inevitable part of a manufacturing process, which each total no more than 0.01 wt % and altogether total at most 0.1 wt %, with a quotient of the percentages by weight of Zn and Ca being less than or equal to 1.

### Claim 2 (depends on 1)

The implant according to claim 1, wherein, with regard to intermetallic phases, the Mg matrix of the alloy contains essentially (Mg,Zn)2Ca precipitation phases.

### Claim 3 (depends on 2)

The implant according to claim 2, wherein the Mg matrix of the alloy contains exclusively (Mg,Zn)2Ca precipitation phases.

### Claim 4 (depends on 1)

The implant according to claim 1, wherein the implant is used for osteosynthesis.

### Claim 5 (depends on 1)

A method for producing the implant for growing patients according to claim 1, comprising keeping the alloy at a temperature in a range from 200 to 400 degrees Celsius in order to produce (Mg,Zn)2Ca precipitation phases.

### Claim 6 (depends on 5)

The method according to claim 5, comprising keeping the alloy at a temperature in the range from 200 to 275 degrees Celsius in order to produce (Mg,Zn)2Ca precipitation phases.

### Claim 7 (depends on 5)

The method according to claim 5, wherein, before hot forming, the alloy is kept at a temperature in order to produce (Mg,Zn)2Ca precipitation phases.

### Claim 8 (depends on 5)

The method according to claim 5, wherein, during hot forming, the alloy is kept at a temperature in order to produce (Mg,Zn)2Ca precipitation phases.

### Claim 9 (depends on 5)

The method according to claim 5, wherein, during artificial aging, the alloy is kept at the temperature for the formation of (Mg,Zn)2Ca precipitation phases.

### Claim 10 (depends on 5)

The method according to claim 5, further comprising producing an implant for osteosynthesis.

### Claim 11 (depends on 1)

A method of using the implant according to claim 1, comprising using the alloy as a material for producing the implant for growing patients for use in osteosynthesis.

### Claim 12 (depends on 11)

The method according to claim 11, comprising using the implant as a Krischner wire, a Herbert screw, a medullary nail, and/or a nail for elastically stable medullary splinting (ESIN), or the like.