Can an ACL partial tear be healed with shots?

No. I dont know of a injection tehjnique that is used. Rehab hamstrings where a brace with activities dont need a reconstruction unless you have multple instability events partial tears are ligamemts that are intact but incompetent. Strectched.
Acl Tear. Most of the ACL tears are now a days treated conservatively with partial immobilization, physical therapy and knee injection with cortisone to help decrease pain and inflammation.