The elevation of the floor of the maxillary
sinus with an autogenous bone graft in a severely
resorbed edentulous maxilla is a generally
accepted pre-implantology procedure to enable
successful placement of endosseous implants in
an optimal prosthetic position1). An often
mentioned drawback of this procedure is the
development of maxillary sinusitis after
augmentation2). The clinical diagnosis of sinusitis
is characterized by a typical triad of symptoms, i.e.
nasal congestion, pathological secretion or
obstruction, and headache3,4). When using general
accepted Ear Nose and Throat (ENT) criteria
for diagnosing sinusitis, however, development
of postoperative chronic maxillary sinusitis
has been reported to occur in 1.3% of the patients
that underwent such a procedure5).