2019 Volume 17 Issue 3-4 Pages 62-68
Background Wnt signaling is valuable protein network involved in bone metabolism;however, its relationship in bone resorption and formation during orthodontic treatment is currently unknown.
Purpose This study examined Wnt5a expression on the compression side in an in vivo experimental rat tooth movement model. The study then investigated the relation of compression force(CF)to Wnt5a expression from human periodontal ligament(PDL)cells.
Material and Methods In vivo, to movement the maxillary first molar, we added 10 g of orthodontic force to twenty male rats for seven days. We assessed the production of tartrate-resistant acid phosphatase (TRAP) and Wnt5a protein in rats alveolar bone through an immunohistochemical analysis. In vitro, we examined the effect of compression force(CF)on Wnt5a expression using the human PDL(hPDL)cells.
Results We observed resorption lacunae with the multinuclear cells in rat alveolar bone during tooth movement in the 10g group. We observed Wnt5a immunoreactivity on day seven with orthodontic force in the PDL tissue. Wnt5a expression increased for timedependent maner after addition of CF in hPDL cells.
Conclusion Given these findings, the Wnt signaling response to optimum orthodontic force appears to stimulate resorption of alveolar bone in the orthodontic tooth movement.
