Z-plasty ideal angle is:
**Core Concept**
A Z-plasty is a surgical technique used to improve the appearance and function of scars by rearranging the surrounding tissue to better align with the surrounding skin. The ideal angle of a Z-plasty is critical in determining its success, as it affects the final scar length and orientation.
**Why the Correct Answer is Right**
The ideal angle of a Z-plasty is 60 degrees. This allows for the greatest reduction in scar length and the most favorable cosmetic outcome. When the angle is 60 degrees, the length of the scar is reduced by approximately 50%, making it less noticeable. The 60-degree angle also allows for the maximum amount of tissue rearrangement, which helps to reduce tension on the wound and promote healing.
**Why Each Wrong Option is Incorrect**
* **Option A:** A 30-degree angle is too small and would not provide adequate tissue rearrangement, leading to a longer scar and less favorable cosmetic outcome.
* **Option B:** A 90-degree angle would result in two linear scars, rather than a single curved scar, which is not the goal of a Z-plasty.
* **Option C:** A 120-degree angle is too large and would result in a longer scar and more tissue loss, making it less desirable.
**Clinical Pearl / High-Yield Fact**
When performing a Z-plasty, it's essential to remember the "60-80 rule": the ideal angle is 60 degrees, and the length of the Z-plasty should be no more than 80% of the length of the original scar.
**Correct Answer: C. 120 degrees is incorrect, the correct answer is 60 degrees.**