"مقمة" - Translation from Arabic to English

Plus,we don't know what that's a cross-section of, and we don't knowat wh caused the damage to the front of the face.
بالإضافة الى اننا لا نعرف لماذا هناك مقطع عرضي ولا نعلم ايضا سبب تحطم مقمة الوجه