An osteogenic stimulator was a medical tool used to stimulate the natural repair of broken or fractured bones.
Some shuttlecraft were equipped with osteogenic stimulators as part of their emergency medkits, but they could only heal minor fractures – more serious fractures required treatment at a medical facility on board a starship or at a starbase.
The model of dermal regenerator used on board Prometheus-class vessels doubled as an osteogenic stimulator. (VOY: "Message in a Bottle")
In 2371, an image of Benjamin Sisko that represented Doctor Julian Bashir's medical skill recommended that a woman's cranial trauma be treated with an osteogenic stimulator. (DS9: "Distant Voices")
In 2372, The Doctor instructed Kes to treat a patient's broken arm with the device. (VOY: "Resolutions")