What characterizes the arms of a typical retractor used to hold back exterior tissues?

The characteristic feature of the arms of a typical retractor that is most accurate is that they often feature sharp teeth for grip. Retractors are designed to hold back tissues, allowing surgeons to access deeper areas during a procedure. The sharp teeth on the retractor arms help to anchor the instrument securely to the tissue, minimizing slippage and ensuring that the tissues are held aside effectively. This provides clear visibility and access to the surgical field, which is critical for successful procedures.

In contrast, while some retractors may have rigid or flat arms, the defining characteristic that distinguishes them in this context is the presence of sharp teeth, which enhances their functionality in gripping and holding tissues.