Losing a limb is extremely traumatic, whether it's during the accident itself or surgically due to another injury. An amputee will experience a complete change to their life, and may be left unable to work, in severe pain, or experiencing mental anguish. Amputations also require months or years of rehabilitation and costly prosthetics.
Injuries to the head, especially traumatic brain injuries
(TBI), are some of the most common injuries suffered during truck wrecks. Victims are often disabled or otherwise-impacted for the rest of their life, suffering mental health problems, personality changes, memory loss, and other issues.
Broken bones are fairly common in car accidents as a whole, but they're generally much more severe if inflicted with a truck. Depending on what kind of break the victim experiences, they could be facing casts, physical therapy, or other costly mitigation and treatment measures. They might never fully regain the use of their limb.