Is it OK for Non Absorbable Sutures to be Used on the Inside of Ear?

Otoplasty often is performed with suture techniques.  A common suture use for the reshaping of the ear cartilage is called mersilene which is a non absorbable braided suture. This suture is not removed  unless it extrudes an uncommnon but recognized complication of otoplasty.  The skin sutures may be absorbable which dissolve.  Surgeons may use absorbable sutures on the skin to avoid the need to remove them. 

Your surgeon has described the use of absorbable and non-absorbable sutures correctly. Permanent (non-absorbable) sutures are commonly used to do the internal work in otoplasty surgery. The final layer closure of skin may be done with either type of suture.

Cartilage reshaping with sutures requires the use of non-absorbable sutures or at least those that last a very long time.  These sutures stay in place and your body will usually have no problem with them.  The sutures on the skin, however, should be removed within seven days in order to prevent the formation of visible scars.  Your surgeon may be using a rapidly dissolving suture, which does not necessarily have to be removed.

At any rate, your surgeon has described the procedure as it is correctly performed.  You should not worry about the sutures!