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Determination of the compressive modulus of elasticity of periodontal ligament derived from human first premolars
PURPOSE: There are two commonly cited modulus of elasticity of the human periodontal ligament (E(PDL)), i.e., 6.89 ✕ 10(−5) GPa (E1) and 6.89 ✕ 10(−2) GPa (E2), which are exactly 1000-fold different from each other. This study aims to clarify the ambiguity of the two E(PDL) used for simulations and...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10018569/ https://www.ncbi.nlm.nih.gov/pubmed/36938472 http://dx.doi.org/10.1016/j.heliyon.2023.e14276 |
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author | Limjeerajarus, Nuttapol Sratong-on, Pimpet Dhammayannarangsi, Phetcharat Tompkins, Kevin A. Kamolratanakul, Paksinee Phannarus, Krisadi Osathanon, Thanaphum Limjeerajarus, Chalida Nakalekha |
author_facet | Limjeerajarus, Nuttapol Sratong-on, Pimpet Dhammayannarangsi, Phetcharat Tompkins, Kevin A. Kamolratanakul, Paksinee Phannarus, Krisadi Osathanon, Thanaphum Limjeerajarus, Chalida Nakalekha |
author_sort | Limjeerajarus, Nuttapol |
collection | PubMed |
description | PURPOSE: There are two commonly cited modulus of elasticity of the human periodontal ligament (E(PDL)), i.e., 6.89 ✕ 10(−5) GPa (E1) and 6.89 ✕ 10(−2) GPa (E2), which are exactly 1000-fold different from each other. This study aims to clarify the ambiguity of the two E(PDL) used for simulations and determine a more accurate E(PDL) value of human first premolars using experimental and simulation approaches. METHODS: Numerical simulations using finite element analysis were performed to analyze PDL deformation under an average Asian occlusal force. To confirm the results, simple and multi-component, true-scale 3D models of a human first premolar were used in the simulations. Finally, a compression test using a universal testing machine on PDL specimens was conducted to identify the compressive E(PDL) of human first premolars. RESULTS: The simulation results from both models revealed that E1 was inaccurate, because it resulted in excessive PDL deformation under the average occlusal force, which should not occur during mastication. Although the E2 did not lead to excessive PDL deformation, it was obtained by an error in unit conversion with no scientific backing. In contrast, the compression test results indicated that the compressive E(PDL) was 9.64 ✕ 10(−4) GPa (E3). In the simulation, E3 did not cause excessive PDL deformation. CONCLUSION: The simulation results demonstrated that both commonly cited E(PDL) values (E1 and E2) were incorrect. Based on the experimental and simulation results, the average compressive E(PDL) of 9.64 ✕ 10(−4) GPa is proposed as a more accurate value for human first premolars. CLINICAL SIGNIFICANCE: The proposed more accurate E(PDL) would contribute to more precise and reliable FEA simulation results and provide a better understanding of the stress distribution and deformation of dental materials, which will be beneficial to precision dentistry, orthodontics and restoration designs. |
format | Online Article Text |
id | pubmed-10018569 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-100185692023-03-17 Determination of the compressive modulus of elasticity of periodontal ligament derived from human first premolars Limjeerajarus, Nuttapol Sratong-on, Pimpet Dhammayannarangsi, Phetcharat Tompkins, Kevin A. Kamolratanakul, Paksinee Phannarus, Krisadi Osathanon, Thanaphum Limjeerajarus, Chalida Nakalekha Heliyon Research Article PURPOSE: There are two commonly cited modulus of elasticity of the human periodontal ligament (E(PDL)), i.e., 6.89 ✕ 10(−5) GPa (E1) and 6.89 ✕ 10(−2) GPa (E2), which are exactly 1000-fold different from each other. This study aims to clarify the ambiguity of the two E(PDL) used for simulations and determine a more accurate E(PDL) value of human first premolars using experimental and simulation approaches. METHODS: Numerical simulations using finite element analysis were performed to analyze PDL deformation under an average Asian occlusal force. To confirm the results, simple and multi-component, true-scale 3D models of a human first premolar were used in the simulations. Finally, a compression test using a universal testing machine on PDL specimens was conducted to identify the compressive E(PDL) of human first premolars. RESULTS: The simulation results from both models revealed that E1 was inaccurate, because it resulted in excessive PDL deformation under the average occlusal force, which should not occur during mastication. Although the E2 did not lead to excessive PDL deformation, it was obtained by an error in unit conversion with no scientific backing. In contrast, the compression test results indicated that the compressive E(PDL) was 9.64 ✕ 10(−4) GPa (E3). In the simulation, E3 did not cause excessive PDL deformation. CONCLUSION: The simulation results demonstrated that both commonly cited E(PDL) values (E1 and E2) were incorrect. Based on the experimental and simulation results, the average compressive E(PDL) of 9.64 ✕ 10(−4) GPa is proposed as a more accurate value for human first premolars. CLINICAL SIGNIFICANCE: The proposed more accurate E(PDL) would contribute to more precise and reliable FEA simulation results and provide a better understanding of the stress distribution and deformation of dental materials, which will be beneficial to precision dentistry, orthodontics and restoration designs. Elsevier 2023-03-04 /pmc/articles/PMC10018569/ /pubmed/36938472 http://dx.doi.org/10.1016/j.heliyon.2023.e14276 Text en © 2023 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Research Article Limjeerajarus, Nuttapol Sratong-on, Pimpet Dhammayannarangsi, Phetcharat Tompkins, Kevin A. Kamolratanakul, Paksinee Phannarus, Krisadi Osathanon, Thanaphum Limjeerajarus, Chalida Nakalekha Determination of the compressive modulus of elasticity of periodontal ligament derived from human first premolars |
title | Determination of the compressive modulus of elasticity of periodontal ligament derived from human first premolars |
title_full | Determination of the compressive modulus of elasticity of periodontal ligament derived from human first premolars |
title_fullStr | Determination of the compressive modulus of elasticity of periodontal ligament derived from human first premolars |
title_full_unstemmed | Determination of the compressive modulus of elasticity of periodontal ligament derived from human first premolars |
title_short | Determination of the compressive modulus of elasticity of periodontal ligament derived from human first premolars |
title_sort | determination of the compressive modulus of elasticity of periodontal ligament derived from human first premolars |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10018569/ https://www.ncbi.nlm.nih.gov/pubmed/36938472 http://dx.doi.org/10.1016/j.heliyon.2023.e14276 |
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