Placement of implants in the resorbed posterior maxilla: comparative study between two distinguished sinus lift procedures

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Abstract

Background

In the process of placing an oseointegrated implant into the resorbed maxillary posterior region, there is often a need for sinus floor elevation. Usually the maxillary sinus pneumatizes toward the ridge crest after dental extraction. Thus, there is a consequent decrease in the available bone height, disfavoring prognosis and preventing implant placement.

Aims or Objectives

The objective of the present study was to evaluate and compare two different techniques for sinus floor elevation along with setting oseointegrated implants.

Methods

Twelve patients, 35-45 years old, ten males and two females underwent implant rehabilitation in the maxillary premolar/molar region. Half of the patients were managed by the modified Summers' osteotome technique , and the remainder by the SINUS UP technique.

Results

Each technique showed advantages and disadvantages.

Conclusion

The osteotome technique was found to be suitable for elevating the antral membrane when an average increase of 3 to 4 mm bone was needed, and at least 4 mm remaining. Its high success rate shows an image of long term bone formation. Where ridge resorption is more advanced and at least 4 mm is remaining, a lateral antrostomy is required in order to end up with sufficient bone height for adequate implant length. The different sinus elevation techniques did not seem to affect the implant success rate. Using β-TCP in the strip form opens up new possibilities for sinus lift procedures, since it simplifies this surgical technique.

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