What is the best treatment for posterior meniscus horn injury?

There is no best treatment for posterior meniscus horn injury and it should be analysed on a case-by-case basis. The main manifestation of a posterior meniscus horn injury is significant pain with excessive knee flexion, which can be accompanied by tender legs, jamming and popping.
For less severe posterior meniscus injuries, conservative treatment can be attempted, including splinting, resting, avoiding long distance walking, excessive knee flexion, walking up and down stairs, etc. Local ointments can also be used to invigorate blood circulation and remove blood stasis, such as pain relief creams.
For more severe posterior meniscal horn injuries, minimally invasive arthroscopic treatment such as meniscal suturing may be an option. If suturing is not possible, a partial meniscoplasty, such as partial or total meniscus removal, and if necessary, meniscus transplantation, may be an option.