When people considering to use rib cartilage, they would ask “warping problem of rib cartilage“.
Yes, Rib cartilage has a warping problem.
When rib cartilage harvested, the shape is like as above.
Curved and cylindrical shape.
As you can see, the color of inside cartilage (Yellow) is different with outside cartilage (white). And density is also different.
When use the rib cartilage for rhinoplasty or revision nose, the core is how controlling the inside cartilage and outside cartilage well as below.
Simply say, Using both side of outside cartilage, attaching to core piece (inside cartilage) to prevent warping.
This is one of method to prevent warping problem of rib cartilage.