Osteocyte morphology and orientation in relation to strain in the jaw bone.
10.1038/s41368-017-0007-5
- Author:
Vivian WU
1
;
René F M VAN OERS
1
;
Engelbert A J M SCHULTEN
2
;
Marco N HELDER
2
;
Rommel G BACABAC
3
;
Jenneke KLEIN-NULEND
4
Author Information
1. Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam Movement Sciences, University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
2. Department of Oral and Maxillofacial Surgery, VU University Medical Center/Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam Movement Sciences, Amsterdam, The Netherlands.
3. Department of Physics, Medical Biophysics Group, University of San Carlos, Cebu City, Philippines.
4. Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam Movement Sciences, University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands. j.kleinnulend@acta.nl.
- Publication Type:Journal Article
- MeSH:
Biopsy;
Bone-Implant Interface;
Calcium Phosphates;
pharmacology;
Dental Implants;
Finite Element Analysis;
Humans;
Maxilla;
surgery;
Osteocytes;
physiology;
Radiography, Panoramic;
Sinus Floor Augmentation;
Tensile Strength
- From:
International Journal of Oral Science
2018;10(1):2-2
- CountryChina
- Language:English
-
Abstract:
Bone mass is important for dental implant success and is regulated by mechanoresponsive osteocytes. We aimed to investigate the relationship between the levels and orientation of tensile strain and morphology and orientation of osteocytes at different dental implant positions in the maxillary bone. Bone biopsies were retrieved from eight patients who underwent maxillary sinus-floor elevation with β-tricalcium phosphate prior to implant placement. Gap versus free-ending locations were compared using 1) a three-dimensional finite-element model of the maxilla to predict the tensile strain magnitude and direction and 2) histology and histomorphometric analyses. The finite-element model predicted larger, differently directed tensile strains in the gap versus free-ending locations. The mean percentage of mineralised residual native-tissue volume, osteocyte number (mean ± standard deviations: 97 ± 40/region-of-interest), and osteocyte shape (~90% elongated, ~10% round) were similar for both locations. However, the osteocyte surface area was 1.5-times larger in the gap than in the free-ending locations, and the elongated osteocytes in these locations were more cranially caudally oriented. In conclusion, significant differences in the osteocyte surface area and orientation seem to exist locally in the maxillary bone, which may be related to the tensile strain magnitude and orientation. This might reflect local differences in the osteocyte mechanosensitivity and bone quality, suggesting differences in dental implant success based on the location in the maxilla.
