Bone cement for rhinoplasty
I would not recommend bone cement for shaping the nose. Although malleable at first, it has a tendency to fracture and may separate from normal bone causing a deformity.
Hydroxyapatite Bone Cement for Nasal Bone Widening
There are numerous graft options to widen the nasal bones through an onlay technique including cartilage, allogeneic dermis and implants. Hydroxyapatite bone cement can also be used and is very moldable. Be certain to have someone do it who has a lot of experience with bone cements as they are tricky to use in tight spaces.