Dog with leg wound escapes cone and bites leg

Our dog has a wound in the right front leg (nothing severe). In order to treat it, a cone of shame (normal plastic one) is being used, together with a specific spray. For reference, the cone looks similar to this one

The spray does what it’s intended to, but the healing takes time. Thing is, in its "free time" the dog (without us nearby) is able to break out of the cone and then goes and bites the leg again, making the healing process take longer.

How to proceed in this situation?