Abstract
This study concerns the determination of some mechanical properties of the periodontal ligament (PDL) by nanoindentation tests. The PDL is an essential promoter of the transmission of stresses applied to a tooth, then of bone remodeling. Few data available in the literature contradict each other. Some mechanical properties of the periodontal ligament were determined by nanoindentation and compared to the existing literature.
Highlights
Dental displacement is primarily a phenomenon linked to the periodontal ligament (PDL)
Orthodontists would like to know the effect of the forces they apply on the PDL to try to apply ideal forces and optimize their treatments [2,3]
Since it is difficult or impossible to quantify these phenomena in vivo, numerical models based on the finite element analysis offer important data to help practitioners [4]
Summary
Dental displacement is primarily a phenomenon linked to the periodontal ligament (PDL) This connective tissue vascularized and innervated, on an average thickness of 200 microns, surrounds the teeth and connects them to the surrounding bone, (Figure 1) [1]. The literature reports a wide range from 0.07MPa to 1750MPa [5] This disparity can be explained by the complexity of the PDL, its small size, its nonlinear behavior and the heterogeneity of the methods used [6]. Conventional tests such as uniaxial traction or compression are unable to capture these microscopic heterogeneities.
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