Are there any disadvantages to placing diced cartilage wrapped in fascia or rib cartilage in the bridge area of nose?

There are advantages and disadvantages. I think the key is how much dorsal augmentation.  Diced cartilage can be molded and does a very nice job on small augmentation.  If you need more than you are better off with rib cartilage but this will be more rigid and perhaps have an edge you can feel.  I believe diced cartilage wrapped in fascia lasts long and gives a very nice result. 

There are advantages and disadvantages to every maneuver in rhinoplasty. I would never make a recommendation between these two choices without an in person examination and then a discussion of what your goals were. In general, diced cartilage in fascia can be used to augment the dorsum but may have small irregularities or may lead to a less well-defined bridge. Rib cartilage usually creates good definition to the dorsum but has the risk or warping/bending and also carries risks for harvesting. It is totally dependent on the surgeon and your needs. I would see a revision rhinoplasty surgeon competent in both techniques. Best of luck

I have used both techniques over the past 3r+ years but I now strongly feel that there are significant advantages to diced cartilage because the graft can be molded to meet the specific needs of each patient, vascularity is excellent, and there is less risk of graft absorption, warping, and palpable sharp edge irregularities.   

There are a few proponents of that technique around the world but has not caught on widely in USA.Plastic surgery is not an exact science and the long term outcome of that technique may not be that good.