Abstract
Objectives
To assess how anatomy and osteogenesis correlated with results of maxillary sinus floor augmentation (MSFA).
Materials and methods
Patients with partial edentulism and advanced atrophy of the posterior maxillae (≤ 4 mm residual bone height, RBH) underwent MSFA with sole deproteinized bovine bone matrix (DBBM) through a lateral approach. After a 6 to 9-month healing period, bone core biopsies were obtained from the sites of implant insertion for histological evaluation. The correlations between anatomical and histomorphometric variables were analyzed in a multiple regression model.
Results
Forty-nine patients were recruited. One biopsy per patient was obtained from the augmented sinus. Thirty-seven bone core biopsies were intact and met the requirement for histomorphometry analysis. The mean (± standard deviation) percentages of vital bone (VB), remaining DBBM, and non-mineralized tissue were 18.25 ± 4.76%, 27.74 ± 6.68%, and 54.08 ± 6.07%, respectively. No statistically significant correlations were found between RBH and VB% (p = 0.44) or between sinus contour and VB% (p = 0.33). However, there was an inverse correlation between the sinus width (SW) and VB % (SW1: R2 = 0.13, p = 0.03; SW2: R2 = 0.15, p = 0.02).
Conclusions
After a healing period of 6–9 months, wider sinuses augmented with DBBM alone tended to have a lower proportion of new bone formation, while RBH and sinus contour did not appear to affect osteogenesis after MSFA.
Clinical relevance
This study emphasized the effect of anatomy on osteogenesis after MSFA. The result of the study may have an indication to the clinician that SW is a consideration when selecting the bone grafting material and deciding the healing period of MSFA.
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Acknowledgements
The authors would like to thank Dr. Jie Sun, Harvard School of Dental Medicine, for her help in language editing and Marta Pulido, MD, for editorial assistance.
Funding
This study was supported by Science and Technology Ministry (Grant/Award Number 2017YGB1302904); Ninth People's Hospital affiliated to Shanghai Jiao Tong University, School of Medicine "Multi-Disciplinary Team" Clinical Research Project (Grant/Award Number: 2017-1-005); and Basic Research Booster Program (Grant/Award Number JYZZ079).
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The protocol was approved by the Institutional Review Board of Shanghai Ninth People's Hospital, China (No: SH9H-2020-T33-2 and 01578). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Zhou, W., Wang, F., Magic, M. et al. The effect of anatomy on osteogenesis after maxillary sinus floor augmentation: a radiographic and histological analysis. Clin Oral Invest 25, 5197–5204 (2021). https://doi.org/10.1007/s00784-021-03827-6
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DOI: https://doi.org/10.1007/s00784-021-03827-6