What is the primary factor that differentiates absorbable sutures from non-absorbable sutures?

The primary factor that differentiates absorbable sutures from non-absorbable sutures is their ability to dissolve over time. Absorbable sutures are specifically designed to break down through natural processes in the body, which allows for gradual absorption without the need for removal after the tissue has healed. This characteristic makes them particularly useful in surgical applications where the suture will be covered by tissue during the healing period, such as in internal organs or within the eye, as they can support healing without leaving foreign material behind.

In contrast, non-absorbable sutures are made from materials that do not break down in the body and are intended to be removed or remain in place permanently, depending on the type of surgery and the surgeon's preference. While factors like tensile strength, color, and purpose in surgery play a role in the selection of sutures, they do not fundamentally distinguish between absorbable and non-absorbable types. The primary distinguishing feature remains the capacity of the suture to degrade and be absorbed by the body over time.