Bone-knitting laser
The bone-knitting laser (also referred to as a knitter) was a specialized medical instrument used for repairing fractured bones. A viable alternative to using a knitter was the use of a splint. ()

When a miniaturized Hikaru Sulu broke his leg in 2269 and the normal bone-knitting laser technology could not be used because of its large size, Dr. McCoy repaired Sulu's injury using a microscope laser instead. ()

See also 
 Bone regenerator
 Osteo-regenerator

Medical equipment