Osteogenesis ability of CAD/CAM porous zirconia scaffolds enriched with nano-hydroxyapatite particles

International Journal of Implant Dentistry
Moustafa N Aboushelib, Rehab Shawky

Abstract

The aim of this study was to evaluate osteogenesis ability of CAD/CAM porous zirconia scaffolds enriched with hydroxy apatite used to augment large boney defects in a dog model. Surgical defects were made bilaterally on the lower jaw of 12 Beagle dogs. Cone beam CT images were used to create three dimensional images of the healed defects. Porous zirconia scaffolds were fabricated by milling custom made CAD/CAM blocks into the desired shape. After sintering, the pores of half of the scaffolds were filled with a nano-hydroxy apatite (HA) powder while the other half served as control. The scaffolds were inserted bilaterally in the healed mandibular jaw defects and were secured in position by resorbable fixation screws. After a healing time of 6 weeks, bone-scaffold interface was subjected to histomorphometric analysis to detect the amount of new bone formation. Stained histological sections were analyzed using a computer software (n=12, α=0.05). Mercury porosimetery was used to measure pore sizes, chemical composition was analyzed using energy dispersive x-ray analysis (EDX), and the crystal structure was identified using x-ray diffraction micro-analysis (XRD). HA enriched zirconia scaffolds revealed significantly higher volume of...Continue Reading

References

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Citations

Sep 20, 2018·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·T A DantasB Henriques
Sep 15, 2020·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Ana MarquesÓscar Carvalho
Mar 7, 2021·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Bei-Yong ShenQi Zhou
Mar 1, 2019·Materials Science & Engineering. C, Materials for Biological Applications·Fernanda H SchünemannBruno Henriques
May 1, 2021·Journal of Clinical Medicine·Stefanie KligmanChenshuang Li

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Methods Mentioned

BETA
imaging techniques
X-ray

Software Mentioned

SPSS
CAMworks

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