Experimental repeatability, sensitivity, and reproducibility of force and strain measurements from within the periodontal ligament space during ex vivo swine tooth loading
| Autor: | Paul W. Major, Christopher R. Dennison, Tracy E. Popowics, Leigh Armijo, Michael R. Doschak, Dan L. Romanyk, Kathryn P. Houg |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Periodontal Ligament Swine Biomedical Engineering 02 engineering and technology Biomaterials Root mean square 03 medical and health sciences 0302 clinical medicine Periodontal fiber Animals Reproducibility Strain (chemistry) Work (physics) Reproducibility of Results 030206 dentistry Repeatability 021001 nanoscience & nanotechnology Biomechanical Phenomena Preload Mechanics of Materials Friedman test Stress Mechanical 0210 nano-technology Tooth Biomedical engineering |
| Zdroj: | Journal of the mechanical behavior of biomedical materials. 120 |
| ISSN: | 1878-0180 |
| Popis: | The Periodontal Ligament (PDL) is a complex connective tissue that anchors a tooth to the surrounding alveolar bone. The small size and complex geometry of the PDL space within an intact tooth-PDL-bone complex (TPBC) limits strain measurements. An in-fiber Bragg grating (FBG) sensor offers potential for such measurements due to its small size. This work defines an experimental procedure where strain and force were measured during quasi-static, apically directed, displacement-controlled tests on swine premolar crowns. Specifically, the: inter-TPBC, intra-TPBC, and long-term repeatability after a preconditioned state was objectively identified; sensitivity to preload magnitude, TPBC alignment, and sensor depth; and reproducibility within a TPBC was determined. Data clustering was used to determine the appropriate number of preconditioning trials, ranging from one to seven. Strain and force measurements showed intra-TPBC repeatability with average adjusted root mean square from the median of 28.9% of the peak strain and 4.5% of the peak force measurement. A Mann-Whitney U test generally found statistically significant differences in peak strain and force measurements between the left and right sides, suggesting a lack of inter-TPBC repeatability. Using a Friedman test, it was shown that peak strain measures were sensitive to the TPBC alignment and sensor depth, while peak force measures were sensitive to the preload and TPBC alignment. A Friedman test suggested reproducible strain and force measurements when the FBG was replaced within the same TPBC and the preload, alignment, and sensor depth were controlled. |
| Databáze: | OpenAIRE |
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