TABLE 2.

Summary of the recent biodegradation performance of L-PBF Mg-based powders.

Mg alloys	Powder characteristics (μm)	Geometry and relative density	Biodegradation performance	In vitro test	Refs
Mg	25 (10–45)	Single track	—	—	Ng et al., (2010); Ng et al., (2011b)
Mg	25.85, 43.32 Gas atomization	Cubic; 96.13	—	—	(Hu et al., (2015)
Mg-Ca	100–200 Gas atomization	Scaffold	—	—	Liu et al., (2017)
Mg-3Zn	60 Gas atomization	Cubic; 97.9	4.6–6.7 ml/cm2 per day	7d SBF immersion	Chen et al., (2016)
AZ91D	59 Gas atomization	Cubic; 99.5			Wei et al., (2014)
ZK30-xCu	10	Non-porous block	Biodegradation rate: ZK30 < ZK30–0.1Cu < ZK30–0.2Cu < ZK30–0.3Cu	—	Xu et al., (2019)
Mg–5.6Zn–0.5Zr (ZK60)	30	Non-porous block	Hydrogen evolution rate in Hank’s solution: 0.006–0.019 ml/cm−2 h−1	48 h immersion in Hank’s solution	Shuai et al., (2017b)
ZK60-Nd	—	Porous scaffold cylinder	1.56 mm per year	-	Shuai et al., (2017c)
ZK60-xCu	4.5–13.6	Non-porous block	ZK60-xCu: 9.5–11.3	5d MG-63 direct contact	Shuai et al., (2018)
WE43	25–60	Porous scaffold cylinder	0.17 ml/cm2/d	3d MG-63 direct contact	Li et al., (2018b)
WE43	25–60	Porous scaffold cylinder; pore size: 600 μm	—	—	Li et al., (2018a)
WE43	25–60	—	7.2 mm per year	—	Zumdick et al., (2019)
WE43	21.77–64.46	Porous scaffold cylinder; pore size: 300–500 μm	0–4 h: 1 ml/cm2/h 4–12 h: 4.26 ml/cm2/h	12 h immersion in Hank’s solution; 7 d direct contact with human bone marrow mesenchymal stem cells	Liu et al., (2022c)
Mg-Nd-Zn-Zr (JDBM)	—	Porous scaffold cylinder; Pore size: 800 μm	Approximately 40% weight loss after 21 d of static immersion	21 d DMEM immersion	Wang et al., (2021b)
JDBM	63.9 ± 14.5	Pore size: 300–400 μm	Biodegradation rate: 0.039 ± 0.003 g/d	10d SBF immersion; 21 d MC3T3-E1 differentiation	Xie et al., (2022)
Zn-xMg	20	Porous scaffold cylinder; Pore size: 600 μm	Biodegradation rate: Zn < Zn–0.1 Mg < Zn–0.2 Mg < Zn–0.5Cu	28d Hank’s immersion; 5 d MC3T3-E1 direct contact	Qin et al., (2022)