An alloy and an implant having a three-dimensional structure based on such alloy. The alloy comprises a monophasic MgZn alloy containing from 2.0 wt. % Zn to 6 wt. % Zn, having less than 0.001 wt. % of one or more other elements with the remainder being Mg. In some embodiments, the alloy is substantially free of microgalvanic elements. In some embodiments, the alloy includes a MgZnCa alloy containing nanosized precipitates being less noble than the Mg matrix alloy and having a Zn content ranging from 3.0 wt. % Zn to 6 wt. % Zn and a calcium content ranging from 0.0005 wt. % to 1.0 wt. %, having less than 0.001 wt. % of one or more other elements with the remainder being Mg. In other embodiments, the alloy includes a MgZnCa alloy containing nanosized precipitates being less noble than the Mg matrix alloy, a plurality of nanosized precipitates being more noble than the Mg matrix and having a Zn content ranging from 3.0 wt. % Zn to 6 wt. % Zn, a calcium content ranging from 0.0005 wt. % to 1.0 wt. %, having less than 0.001 wt. % of one or more other elements with the remainder being Mg.一種合金及具有基於如此合金的三維結構之植入物。合金包括單相MgZn合金，其含有2.0重量%Zn至6重量%Zn，具有小於0.001重量%一或多種其他元素，剩餘部分為Mg。在若干具體實例中，合金大體上沒有微電化(microgalvanic)元素。在若干具體實例中，合金包含MgZnCa合金，其含有不比Mg基質合金貴重之奈米尺寸沉澱物，且具有Zn含量範圍3.0重量%Zn至6重量%Zn及鈣含量範圍0.0005重量%至1.0重量%，具有小於0.001重量%一或多種其他元素，剩餘部分為Mg。在其他具體實例中，合金包含MgZnCa合金，其含有不比Mg基質合金貴重之奈米尺寸沉澱物，較Mg基質更貴重之複數個奈米尺寸沉澱物，且具有Zn含量範圍3.0重量%Zn至6重量%Zn及鈣含量範圍0.0005重量%至1.0重量%，具有小於0.001重量%一或多種其他元素，剩餘部分為Mg。
