Effectiveness injection

The treatment offers good results for a bent first knuckle. It works less well for a bent second knuckle. Among 100 people about 34 will develop a bent finger again with 3 years of treatment. ²²

Among 100 people, 73 are satisfied with collagenase injection.¹³

Complications

Many people have a small skin tear. These heal over time without additional treatment.¹⁴

4 out of 1000 people rupture the tendons that flex the finger, usually the small finger.¹⁴