The short answer to the title’s question is “because the lowering of the sinus floor was not prevented earlier”. The more detailed answer follows below. One very specific type of bone graft is the sinus lift. The maxilary sinus is located above the roots of the upper teeth from the […] Read more »
Why Some Patients Need Bone Graft or Sinus Lift?
In order for the dental implant to integrate with the bone(fuse, bond with the bone), it has to be surrounded by a layer of bone of at least 1.5 mm. Sometimes, some patients do not have enough thickness of the bone to ensure that the implant is completely surrounded by […] Read more »