The bone that takes the shortest time to heal is generally considered to be the finger bone.
Finger bones, also known as phalanges, are small and have a good blood supply, which helps them heal faster. However, the healing time can vary depending on the severity of the fracture, the individual's health, and other factors.
Other bones that tend to heal quickly include the toes and ribs. These bones are also relatively small and have good blood flow.
Larger bones, such as the femur (thigh bone) or humerus (upper arm bone), take longer to heal because they have a larger surface area and require more time for the bone fragments to knit together.
It's important to note that the healing time for any bone can be affected by factors such as age, overall health, nutrition, and the presence of any underlying medical conditions.