The less an implant looks like a natural tooth, the more an operation will be needed. An implant operation is called the procedure that makes the patient fit to a non-fitting screw.
Upper molars regularly have three roots. The sinus floor goes in between the roots. So in 98% of cases you will need a sinus lift operation in the upper jaw region to fix a screw-type implant. BioImplant never needs a sinus lift.