Final answer:
Finer sutures cause less tissue injury, not more. Deep sutures are made of absorbable material, not nonabsorbable, and all sutures can cause inflammation as they are foreign bodies. Retention sutures are placed more deeply than skin sutures to aid in healing large wounds.
Step-by-step explanation:
The statement that finer sutures cause more tissue injury is incorrect. In fact, finer sutures cause less tissue injury, allowing for a more minimal impact on the tissue. Furthermore, deep sutures are typically made of absorbable material and are designed to dissolve over time within the body; thus, claiming deep sutures are nonabsorbable is not accurate. It is true that all sutures are foreign bodies to the tissue and can elicit a local inflammatory response upon placement. Lastly, retention sutures are indeed placed more deeply than skin sutures to provide additional support for closing large or deep wounds.
When discussing tissue repair and suturing, it is important to acknowledge that the healing process begins with clotting and scab formation, reducing blood loss and infection risk. Over time, fibroblasts replace lost collagen and support tissue regeneration. This phase may involve granulation tissue and scar formation if the healing happens through secondary union. Sutures can facilitate primary union by bringing wound edges together and minimizing the formation of disfiguring scars. The materials used for the sutures and their placement significantly influence the healing outcome and the degree of scarring.