Final answer:
When the jaws of a stainless steel needle holder becomes worn, it must be replaced to ensure safe and effective use.
Step-by-step explanation:
In medicine, when the jaws of a stainless steel needle holder become worn, it is necessary to replace the needle holder.
Worn jaws can cause the needle holder to lose its grip, which can result in the needle slipping or not being held securely. This can lead to safety concerns and potential harm to the patient.
Regular inspection of needle holders and replacement when necessary is important to ensure the safe and effective use of surgical instruments.