Tapping is required in a screw which is:
**Core Concept**
Tapping is a process in orthopedic surgery where a hole is drilled in a bone to accommodate a screw, but the screw thread is cut into the bone itself. This is crucial for achieving stability and preventing screw pull-out.
**Why the Correct Answer is Right**
The correct answer is related to the type of screw that requires tapping. Tapping is necessary for screws with a coarse thread, such as cancellous screws. These screws have a larger thread diameter and are designed to cut into the bone tissue, providing a stable anchor. The screw thread is cut into the bone by the tapping process, which creates a stronger bond between the screw and the surrounding bone.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is likely incorrect because it is too vague. Tapping is not a requirement for all types of screws, only those with a specific thread design.
* **Option B:** This option may be incorrect because it does not specify the type of screw that requires tapping. Some screws may not require tapping, such as cortical screws with a fine thread.
* **Option C:** This option is incorrect because it is too broad. Tapping is not a requirement for all screws, only those with a specific thread design.
**Clinical Pearl / High-Yield Fact**
Remember that tapping is a critical step in the insertion of cancellous screws, as it helps to create a stable anchor in the bone. Failure to tap may result in screw pull-out or other complications.
**Correct Answer:** C.