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Blake, Wm. Christ Healing the Woman With an Issue of Blood. 1780.

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Researchers have engineered a “bone bandage” that uses electrical signals and growth hormones from a naturally occurring mineral to regenerate damaged bones. When tested on mice, skull injuries were healed over six weeks.

The technology has great promise for humans, as current strategies for bone regeneration have significant limitations. Grafts and scaffolds, for instance, require a donor site and typically have limited availability and a high cost.