Related Experiment Video
Updated: Jul 15, 2026
Real-Time Dynamic Navigation System for the Precise Quad-Zygomatic Implant Placement in a Patient with a Severely Atrophic Maxilla
Published on: October 18, 2021
Long-term results in placement of screw-type implants in the pterygomaxillary-pyramidal region
Jesús Fernández Valerón1, Pilar F Valerón
1jfernandez@dbbf.ulpgc.es
Purpose:
To present the long-term results for screw-type implants consecutively placed in the pterygomaxillary-pyramidal region in the treatment of patients with posterior maxillary edentulism.
Materials And Methods:
One hundred fifty-two implants were inserted in 92 partially edentulous patients using cylindric osteotomes as bone-site formers, thus minimizing the use of drills in the bone preparation.
Results:
The 152 implants placed were loaded for an average of 89.7+/-30.7 months. There were a total of 8 failures; 6 took place between implant placement and prosthesis delivery (early failures), and 2 failed in following functional loading. The overall survival rate was 94.7%.
Discussion:
Cylindric osteotomes allow the surgeon to accurately place implants. The use of surgical drilling was minimized, resulting in lowered surgical risk and diminished bone loss.
Conclusion:
Implant placement in the posterior pterygomaxillary region using cylindric osteotomes for osteotomy preparation resulted in an implant survival rate of 94.7%.
