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The International Journal of Oral & Maxillofacial Implants



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Int J Oral Maxillofac Implants 34 (2019), No. 4     22. July 2019
Int J Oral Maxillofac Implants 34 (2019), No. 4  (22.07.2019)

Page 819-827, doi:10.11607/jomi.7350, PubMed:30768660

Antrostomy Preparation for Maxillary Sinus Floor Augmentation Using Drills or a Sonic Instrument: A Microcomputed Tomography and Histomorphometric Study in Rabbits
Masuda, Katsuhiko / Silva, Erick Ricardo / Botticelli, Daniele / Apaza Alccayhuaman, Karol Alí / Xavier, Samuel P.
Purpose: To evaluate healing after sinus floor augmentation at antrostomies prepared with either a drill or a sonic instrument.
Materials and Methods: Sinus mucosa elevation was performed bilaterally in 18 rabbits. The antrostomy was prepared with either a drill or a sonic instrument. The elevated space was filled with a collagenated porcine bone, and the access antrostomy was covered by a collagen membrane. The animals were euthanized in groups of six after 2, 4, and 8 weeks of healing. Microcomputed tomography and a histologic analysis were performed.
Results: After 8 weeks of healing, remaining defects occupying about 28.9% and 26.0% of the antrostomy were found in the microcomputed tomography analysis. In the histologic analysis, new bone was formed from the margins of the antrostomy, reaching the central region over time. After 8 weeks of healing, 29.1% ± 18.6% and 28.4% ± 15.6% of new mineralized bone was occupying the analyzed zone in the antrostomy at the drill and sonic sites, respectively.
Conclusion: The use of a sonic device to prepare the antrostomy resulted in similar healing outcomes in both the antrostomy and the elevated regions.

Keywords: animal study, bone healing, histology, morphometry, sinus floor elevation, xenograft