Mallet finger

Treatment options include surgery or putting the finger in a Mallet splint for 6 to 8 weeks or extension block k-wire for 4 weeks. The splint allows the tendon to return to normal length, if the finger is bent during these weeks the healing process must start all over again. Surgery is used to reattach the tendon and is usually performed within a week of the injury.

Less sophisticated splint shown here, but it will work until you get more suitable one from doctor's office.

I

consider all options ;-0