Which suture creates a tight, leak-proof closure but leaves an unsightly ridge on the incision surface?

The locking suture is known for its ability to create a tight, leak-proof closure due to the way the needle and thread are intertwined. This technique involves passing the needle through the tissue and then looping the suture back on itself, creating a secure knot that minimizes the chances of dehiscence (opening of the wound). This structure allows for an effective seal of the incision, which is particularly important in surgical settings where preventing fluid leakage is critical.

However, one drawback of the locking suture is that it tends to create an unsightly ridge along the incision surface. This ridge is formed because the lock mechanism pulls the edges of the skin together more tightly than other suturing methods, leading to a more prominent linear feature on the healed skin. This can be aesthetically undesirable in the context of skin closures, making the locking suture a less favorable option when cosmetic appearance is a priority.

In contrast, techniques like the double intradermal suture or continuous suture options are designed to provide a more even closure that may better match the surrounding skin texture and minimize scarring. The worm suture is less common and serves a different purpose in wound management, focusing more on securing tissue layers rather than creating a tight skin closure.