Final answer:
The appropriate intervention would be to use a sterile solution to loosen the encrustations.
Step-by-step explanation:
The appropriate intervention in this situation would be to use a sterile solution to loosen the encrustations. Pulling forcefully or applying more pressure could potentially cause further damage and delay the healing process. By using a sterile solution, the nurse can gently soften the encrustations and make it easier to remove the sutures without causing harm to the client. Leaving the encrusted sutures in place is not advisable as it may lead to infection or other complications.