The dimension and density of the sockets will be measured 4-6 months later to determine whether rhPDGF-BB facilitates bone healing.  In fact the density of the bone graft 6 months postop remains the same as immediate postop, similar to the native bone as well (Fig.5).

Sinus Lift With Extraction     Last     Next (Mag)

Xin Wei, DDS, PhD, MS 1st edition 09/29/2020, last revision 09/29/2020