Splint

A splint was an ancient medical concept that uses two flat pieces of wood or plastic, wrapped with a bandage to keep a broken bone immobile. According to Doctor Katherine Pulaski, it is a time-honored way of practicing medicine "with your head, your heart, and your hands." 

The crew of the USS Enterprise (NCC-1701) fashioned a splint to hold the bone while they carried the miniaturized Hikaru Sulu to sickbay after he fell from his controls and broke his leg. 

By the 23rd and 24th century the favored form of technology used to repair broken bones became the bone-knitting laser, or knitter. 

Quark made a splint for Odo's leg after it was broken on a Class L planet they were stranded on in 2373.