Removal of Grafts at 6 Months?

The decision to do surgery depends on the indications. It is impossible to give you good answer without more information and pictures. What was the reason for the Rib Graft?

To give a useful answer to your question, I would need to know what your original nasal defect was.  I would also need to know why you want the grafts removed.

Typically spreader grafts are used to increase the size of the internal nasal valve (air passage) in the nose and are not particularly visible.  They may widen the dorsum of the nose slightly.

The rib onlay graft may have been used to augment the dorsum of the nose.  If you can feel it or it is bothering you it can be removed.  Keep in mind though, that it was there for a reason.  You may not like the appearance after it is removed.  It is possible to replace the rib graft with a softer graft such as diced cartilage in fascia.

The surgery you are contemplating does not require a specialist in revision but I would first speak with your original surgeon and express your concerns.  Best of luck to you.