It depends on how low or high the nasal bones are positioned.
Open roof deformity nose.
After the bone is sliced away the nose looks great on profile view.
On profile view a large dorsal hump causes the nose to look like it has a big bump.
Typically the nasal skin grows or droops and vertical lines or depressions start to appear.
Correction involves assuring centralization of the septum and complete medial mobilization of the lateral segments following.
The best way to explain an open roof deformity is to start by explaining hump reduction rhinoplasty.
The hump is removed with a scalpel essentially a slice of bone is taken away.
When a large dorsal hump is reduced the bridge dorsum of the nose appears flat this is an open roof deformity.
An open roof deformity makes the nose appear excessively wide.
If alignment failure is unilateral the nose appears asymmetric.
How to correct it.