Objective
The aim of this study was to develop a new technique for maxillary sinus floor elevation
through the crestal approach, using trephines and osteotomes with stops, and to assess
the risk of sinus membrane lesion.
Study design
The study was performed on 30 heads removed from fresh nonpreserved cadavers with
subsinus bone height ≥5 mm. The anatomic specimens were sectioned axially on a plane
passing 1 cm below the infraorbital foramen, to be able to see and film the sinus
floor covered by the membrane. A total of 112 implants were placed using this technique
(48 without grafting material and 64 with grafting material).
Results
Using this technique, we obtained a 4-6 mm elevation of the sinus membrane without
impairing the mucosa. In the 13 cases where membrane lesions were observed, 9 had
been performed without grafting material. The greater the initial subsinus bone height,
the higher the elevation observed.
Conclusions
The success of this technique was due to stops on the trephines and osteotomes, which
reduced the risk of invading the sinus cavity and made it possible to lift the membrane
gently, fully controlling movements. This technique is indicated for large crests
of type III or IV bone and with a minimal bone height of 5 mm.
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Article info
Publication history
Published online: June 12, 2008
Accepted:
December 24,
2007
Received in revised form:
December 11,
2007
Received:
September 14,
2007
Identification
Copyright
© 2008 Mosby, Inc. Published by Elsevier Inc. All rights reserved.
