What are the two main types of needle holders used in surgical procedures?

The two main types of needle holders used in surgical procedures are indeed locking and non-locking types. Locking needle holders are designed with a mechanism that can secure the needle in place, providing greater stability and control when suturing tissues. This feature is particularly important in delicate or complex surgeries where precision is crucial.

On the other hand, non-locking needle holders do not have a locking mechanism and rely more on the grip of the user to hold the needle securely. While they can still be effective in many surgical situations, they may not offer the same level of control as locking holders, especially in intricate procedures.

Both types serve essential functions in surgery, but the choice between them typically depends on the specific requirements of the procedure and the surgeon's preference.