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Journal of Dental Research
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CRITICAL REVIEWS IN ORAL BIOLOGY & MEDICINE

On a Path to Unfolding the Biological Mechanisms of Orthodontic Tooth Movement

V. Krishnan1,* and Z. Davidovitch2

1 Department of Orthodontics, Rajas Dental College, Tirunelveli District, Tamilnadu, India; and
2 Department of Orthodontics, Case Western Reserve University, Cleveland, OH, USA

Correspondence: * Gourivilasam, Kudappanakunnu PO, Trivandrum, Kerala State—695043, India, vikrishnan{at}yahoo.com

Orthodontic forces deform the extracellular matrix and activate cells of the paradental tissues, facilitating tooth movement. Discoveries in mechanobiology have illuminated sequential cellular and molecular events, such as signal generation and transduction, cytoskeletal re-organization, gene expression, differentiation, proliferation, synthesis and secretion of specific products, and apoptosis. Orthodontists work in a unique biological environment, wherein applied forces engender remodeling of both mineralized and non-mineralized paradental tissues, including the associated blood vessels and neural elements. This review aims at identifying events that affect the sequence, timing, and significance of factors that determine the nature of the biological response of each paradental tissue to orthodontic force. The results of this literature review emphasize the fact that mechanoresponses and inflammation are both essential for achieving tooth movement clinically. If both are working in concert, orthodontists might be able to accelerate or decelerate tooth movement by adding adjuvant methods, whether physical, chemical, or surgical.

Key Words: tooth movement • cellular mechanotransduction • extracellular matrix • cytoskeleton • nucleic acids • osteocytes • fibroblasts • angiogenesis • mechanoreceptors

Journal of Dental Research, Vol. 88, No. 7, 597-608 (2009)
DOI: 10.1177/0022034509338914
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