To overcome the intra and post-operative complications that might arise during the use of the
conventional instruments for cutting the bony window and elevation of maxillary sinus membrane,
the application of ultrasonic device (piezosurgery) has been introduced.
Aim of the study: To evaluate the efficiency and safety of the piezosurgery during direct sinus
lifting procedure in comparison to the conventional rotary instruments.
Patients and methods: A randomized controlled clinical trial was performed, in which forty
patients (17 females and 23 males) with bone height of less than 3 mm in the posterior maxilla, who
required implant placement to replace the missing teeth, were selected. The sinus lift surgeries were
done either by the piezosurgery or the conventional bur technique. The rate of perforation, time of
the operation, healing, postoperative edema, and pain were evaluated. Six months later, implants
were placed within the augmented sites.
Results: A lower percentage of membrane perforation has been encountered in the piezosurgery
group (5% one patient), when compared to the conventional group (15%, three patients).The pain
and swelling were significantly less in the piezosurgery group but the mean time was longer in the
piezosurgery group .
Conclusion: The piezosurgery is an effective device that is safer in performing the lateral
maxillary sinus lift surgery than the conventional rotary method, but unfortunately it takes longer
operation time.