What type of closure material is usually preferred for closing the sternum after surgery?

The preferred closure material for closing the sternum after surgery is stainless steel wires. This is primarily due to their strength and ability to provide a secure and rigid fixation of the sternal halves following a sternotomy. The sternum requires a stable repair to ensure proper healing and to provide structural support to the thoracic cavity, especially during the initial phases of recovery when the patient may begin mobilizing.

Stainless steel wires are resistant to bending and breakage, which is essential for maintaining the closure during the healing process. They do not rely on gradual absorption, which is critical in this context since the sternal union needs to be maintained until the bone heals adequately. Other materials, such as absorbable sutures, may not provide the necessary strength and stability for this specific application.