The biomechanical function of periodontal ligament fibres in orthodontic tooth movement

Steven McCormack, Ulrich Witzel, Peter J Watson, Michael J Fagan, Flora Gröning (Corresponding Author)

Research output: Contribution to journalArticle

27 Citations (Scopus)
4 Downloads (Pure)

Abstract

Orthodontic tooth movement occurs as a result of resorption and formation of the alveolar bone due to an applied load, but the stimulus responsible for triggering orthodontic tooth movement remains the subject of debate. It has been suggested that the periodontal ligament (PDL) plays a key role. However, the mechanical function of the PDL in orthodontic tooth movement is not well understood as most mechanical models of the PDL to date have ignored the fibrous structure of the PDL. In this study we use finite element (FE) analysis to investigate the strains in the alveolar bone due to occlusal and orthodontic loads when PDL is modelled as a fibrous structure as compared to modelling PDL as a layer of solid material. The results show that the tension-only nature of the fibres essentially suspends the tooth in the tooth socket and their inclusion in FE models makes a significant difference to both the magnitude and distribution of strains produced in the surrounding bone. The results indicate that the PDL fibres have a very important role in load transfer between the teeth and alveolar bone and should be considered in FE studies investigating the biomechanics of orthodontic tooth movement.
Original languageEnglish
Article numbere102387
Number of pages13
JournalPloS ONE
Volume9
Issue number7
DOIs
Publication statusPublished - 18 Jul 2014

Fingerprint

Tooth Movement Techniques
Periodontal Ligament
Ligaments
ligaments
Bone
teeth
Fiber
Fibers
bones
Finite Element
Biomechanics
Bone and Bones
Tooth
Finite Element Model
Tooth Socket
Alveolar Bone Loss
Inclusion
Finite Element Analysis
finite element analysis
resorption

ASJC Scopus subject areas

  • Orthodontics
  • Biomedical Engineering
  • Modelling and Simulation

Cite this

The biomechanical function of periodontal ligament fibres in orthodontic tooth movement. / McCormack, Steven; Witzel, Ulrich; Watson, Peter J; Fagan, Michael J; Gröning, Flora (Corresponding Author).

In: PloS ONE, Vol. 9, No. 7, e102387, 18.07.2014.

Research output: Contribution to journalArticle

McCormack, Steven ; Witzel, Ulrich ; Watson, Peter J ; Fagan, Michael J ; Gröning, Flora. / The biomechanical function of periodontal ligament fibres in orthodontic tooth movement. In: PloS ONE. 2014 ; Vol. 9, No. 7.
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