TY - JOUR
T1 - Biomechanics and strain mapping in bone as related to immediately-loaded dental implants
AU - Du, Jing
AU - Lee, Ji Hyun
AU - Jang, Andrew T.
AU - Gu, Allen
AU - Hossaini-Zadeh, Mehran
AU - Prevost, Richard
AU - Curtis, Donald A.
AU - Ho, Sunita P.
N1 - Funding Information:
This research is supported by NIH (Grants NIDCRR01DE022032 and NCRRS10RR026645 ). The authors are grateful to Mr. Edward Garcia at UCSF School of Dentistry, Joel Mancuso and Chris Rieken at Carl Zeiss Microscopy and Brian Miller at Bruker AXS Inc. for their technical assistance. The authors would also like to thank Straumann AG for providing the dental implants in this study.
Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/9/18
Y1 - 2015/9/18
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jbiomech.2015.05.014
DO - 10.1016/j.jbiomech.2015.05.014
M3 - Article
C2 - 26162549
AN - SCOPUS:84942821275
SN - 0021-9290
VL - 48
SP - 3486
EP - 3494
JO - Journal of Biomechanics
JF - Journal of Biomechanics
IS - 12
M1 - 7265
ER -