This procedure is mainly used to improve the condition of a wide face (“pancake face correction”) caused by zygomatic arch protrusion laterally, but it cannot obviously change the zygomatic body. It is often performed on patients with a mild or moderate wide face or those who want to retain the original angle of the zygomatic bone but only improve the bony protruding parts of the lateral cheekbone. This procedure has two incisions: one is in the intraoral upper gum (approximately 2 cm) and the other is behind the temporal hairline (approximately 1 cm). From these incisions, Dr. Chuang will detach the skin and bone first to create the appropriate surgical field and then will perform an “I” or “L” cutting procedure at the junction of the zygomatic bone and arch using a high-speed electric sawing machine. To prevent involving excess zygomatic body, the cutting line should be placed from the lateral one-fourth to one-third of the zygomatic bone; Dr. Chuang will also cut through the posterior part of the zygomatic arch in front of the ears to keep the whole zygomatic arch to be inwardly movable. After the anterior and posterior parts of the zygomatic arch are cut through, their entire lateral sections can be internally rotated and folded. In this manner, face width on the front side can be effectively reduced, but the regional cheekbone contour can still be retained. Finally, Dr. Chuang needs to fix the anterior and posterior cross-sections by titanium bone screws and plates. The characteristics of this surgery are as follows: cheekbone features can be maximally maintained (such as the line of 45° angle or zygomatic muscle) and only the posterolateral width of the zygomatic arch is reduced by 0.5–0.8 cm at either side. This procedure is suitable for patients whose faces are flat but become wide due to posterior zygomatic arch protrusion.