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Intentional Angulation of an Implant to Avoid a Pneumatized Maxillary Sinus: A Case ReportFULL TEXT
Terry J. Lim, DMD, Dip Prostho, FRCD(C)
A b s t r a c t
Eleven years previously, implants had been placed anterior to this region, but the patient was told that implants could not be placed posteriorly unless a sinus lift was done. At the time of the current presentation she was still unwilling to undergo a sinus lift procedure but wanted to know if implants could be placed in the posterior right maxilla. A tomogram obtained with a radiographic stent in place indicated that there was insufficient bone height to allow placement of implants at the usual angulation without a sinus lift. Therefore, to avoid the need for a sinus lift, 2 implants were placed with palatal angulation as guided by a tomographically determined surgical stent.
The treatment planning and surgical and restorative techniques are reviewed here. A postoperative tomogram was obtained to determine the final position of the implants. The outcome has been favourable for the patient and the clinicians. In situations where there is sufficient palatal bone medial to the maxillary sinus, placing implants at an angle may prevent the need for a sinus lift procedure, assuming that proper development of an occlusal restorative scheme is possible.
MeSH Key Words: dental implantation, endosseous/methods; dental prosthesis design; maxilla/surgery; tomography, x-ray computedReply to this article | View replies 
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