生分解性マグネシウムインプラント由来抽出培地の物理的因子がヒト歯肉線維芽細胞に与える影響
This in vitro study examined how corrosion-derived medium changes from magnesium (Mg) barrier membranes—used in guided bone regeneration (GBR) for periodontal defects—affect human gingival fibroblast (HGF) migration, proliferation, and viability. Individual parameters including Mg²⁺ concentration, Ca²⁺ concentration, osmolality, and dissolved molecular hydrogen were tested separately and in combination. HGF migration was markedly reduced at 75 mM Mg²⁺ and at 0 mM Ca²⁺. In complex Mg extract media, a transiently elevated Mg²⁺/Ca²⁺ ratio correlated with slower migration. Supernatant analysis from HGF migration assays on Mg membranes indicated that a persistently elevated molecular hydrogen concentration, combined with the altered Mg²⁺/Ca²⁺ ratio, collectively accounts for the reduced migration rate. The authors note these findings are cell-type specific and should be considered when evaluating Mg implant performance in dental applications.
Corrosion of Mg implants elevates local Mg²⁺ while depleting Ca²⁺, increasing the Mg²⁺/Ca²⁺ ratio; this ionic imbalance, combined with a sustained rise in dissolved molecular hydrogen concentration, suppresses HGF migration in a cell-type-specific manner.
This is basic research at the cellular or molecular level. For human application, inhalation is the most promising delivery route, but inhalation carries explosion risk and concentration matters (empirical LFL of 10%; high-concentration devices are not recommended).
See also:
https://h2-papers.org/en/papers/31352109