Biomechanical characterization of the periodontal ligament: Orthodontic tooth movement

Richard Uhlir, Virginia Mayo, Pei Hua Lin, Si Chen, Yan Ting Lee, Garland Hershey, Feng Chang Lin, Ching Chang Ko

Research output: Research - peer-reviewArticle

Abstract

Objective: To quantify the biomechanical properties of the bovine periodontal ligament (PDL) in postmortem sections and to apply these properties to study orthodontic tooth intrusion using finite element analysis (FEA). We hypothesized that PDL's property inherited heterogeneous (anatomical dependency) and nonlinear stress-strain behavior that could aid FEA to delineate force vectors with various rectangular archwires. Materials and Methods: A dynamic mechanical analyzer was used to quantify the stress-strain behavior of bovine PDL. Uniaxial tension tests using three force levels (0.5, 1, and 3 N) and samples from two anatomical locations (circumferential and longitudinal) were performed to calculate modulus. The Mooney-Rivlin hyperelastic (MRH) model was applied to the experimental data and used in an FEA of orthodontic intrusion rebounded via a 0.45-mm step bend with three archwire configurations of two materials (stainless steel and TMA). Results: Force levels and anatomical location were statistically significant in their effects on modulus (P < .05). The apical part had a greater stiffness than did the middle part. The MRH model was found to approximate the experimental data well (r = 0.99), and it demonstrated a reasonable stress-strain outcome within the PDL and bone for FEA intrusion simulation. The force acting on the tooth increased five times from the 0.016 x 0.022-inch TMA to the 0.019 x 0.025-inch stainless steel. Conclusions: The PDL is a nonhomogeneous tissue in which the modulus changed in relation to location. PDL nonlinear constitutive model estimated quantitative force vectors for the first time to compare intrusive tooth movement in 3-D space in response to various rectangular archwires.

LanguageEnglish (US)
Pages183-192
Number of pages10
JournalAngle Orthodontist
Volume87
Issue number2
DOIs
StatePublished - Mar 1 2017

Fingerprint

Tooth Movement Techniques
Periodontal Ligament
Finite Element Analysis
Stainless Steel
Orthodontics
Nonlinear Dynamics
Tooth
Bone and Bones

Keywords

  • Bovine
  • Elastic rebound
  • FEA
  • Hyperelastic
  • Nonlinear
  • PDL
  • Tooth movement

ASJC Scopus subject areas

  • Orthodontics

Cite this

Uhlir, R., Mayo, V., Lin, P. H., Chen, S., Lee, Y. T., Hershey, G., ... Ko, C. C. (2017). Biomechanical characterization of the periodontal ligament: Orthodontic tooth movement. Angle Orthodontist, 87(2), 183-192. DOI: 10.2319/092615-651.1

Biomechanical characterization of the periodontal ligament : Orthodontic tooth movement. / Uhlir, Richard; Mayo, Virginia; Lin, Pei Hua; Chen, Si; Lee, Yan Ting; Hershey, Garland; Lin, Feng Chang; Ko, Ching Chang.

In: Angle Orthodontist, Vol. 87, No. 2, 01.03.2017, p. 183-192.

Research output: Research - peer-reviewArticle

Uhlir, R, Mayo, V, Lin, PH, Chen, S, Lee, YT, Hershey, G, Lin, FC & Ko, CC 2017, 'Biomechanical characterization of the periodontal ligament: Orthodontic tooth movement' Angle Orthodontist, vol 87, no. 2, pp. 183-192. DOI: 10.2319/092615-651.1
Uhlir R, Mayo V, Lin PH, Chen S, Lee YT, Hershey G et al. Biomechanical characterization of the periodontal ligament: Orthodontic tooth movement. Angle Orthodontist. 2017 Mar 1;87(2):183-192. Available from, DOI: 10.2319/092615-651.1
Uhlir, Richard ; Mayo, Virginia ; Lin, Pei Hua ; Chen, Si ; Lee, Yan Ting ; Hershey, Garland ; Lin, Feng Chang ; Ko, Ching Chang. / Biomechanical characterization of the periodontal ligament : Orthodontic tooth movement. In: Angle Orthodontist. 2017 ; Vol. 87, No. 2. pp. 183-192
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