Biomechanics and strain mapping in bone as related to immediately-loaded dental implants

Jing Du, Ji Hyun Lee, Andrew T. Jang, Allen Gu, Mehran Hossaini-Zadeh, Richard Prevost, Donald A. Curtis, Sunita P. Ho

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Abstract

The effects of alveolar bone socket geometry and bone-implant contact on implant biomechanics, and resulting strain distributions in bone were investigated. Following extraction of lateral incisors on a cadaver mandible, implants were placed immediately and bone-implant contact area, stability implant biomechanics and bone strain were measured. In situ biomechanical testing coupled with micro X-ray microscopy (μ-XRM) illustrated less stiff bone-implant complexes (701-822. N/mm) compared with bone-periodontal ligament (PDL)-tooth complexes (791-913. N/mm). X-ray tomograms illustrated that the cause of reduced stiffness was due to limited bone-implant contact. Heterogeneous elemental composition of bone was identified by using energy dispersive X-ray spectroscopy (EDS). The novel aspect of this study was the application of a new experimental mechanics method, that is, digital volume correlation, which allowed mapping of strains in volumes of alveolar bone in contact with a loaded implant. The identified surface and subsurface strain concentrations were a manifestation of load transferred to bone through bone-implant contact based on bone-implant geometry, quality of bone, implant placement, and implant design. 3D strain mapping indicated that strain concentrations are not exclusive to the bone-implant contact regions, but also extend into bone not directly in contact with the implant. The implications of the observed strain concentrations are discussed in the context of mechanobiology. Although a plausible explanation of surgical complications for immediate implant treatment is provided, extrapolation of results is only warranted by future systematic studies on more cadaver specimens and/or in vivo models.

Original languageEnglish (US)
Article number7265
Pages (from-to)3486-3494
Number of pages9
JournalJournal of Biomechanics
Volume48
Issue number12
DOIs
StatePublished - Sep 18 2015

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All Science Journal Classification (ASJC) codes

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation

Cite this

Du, J., Lee, J. H., Jang, A. T., Gu, A., Hossaini-Zadeh, M., Prevost, R., Curtis, D. A., & Ho, S. P. (2015). Biomechanics and strain mapping in bone as related to immediately-loaded dental implants. Journal of Biomechanics, 48(12), 3486-3494. [7265]. https://doi.org/10.1016/j.jbiomech.2015.05.014