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Sola Rajan*, Poornima R. Jnaneshwar and K. Ravi


Objective: To elucidate the difference in orthodontic tooth movement among women during menstruation and ovulation phase. Materials and Methods: Twenty-four women aged between 18-25 years were divided into Menstruation group and Ovulation group. All subjects were treated with fixed orthodontic appliance. An orthodontic force of 150 grams was given at the time of menstruation in Menstruation group and ovulation in the Ovulation group for en-masse retraction using module and ligature (Frictional mechanics). Orthodontic tooth movement and levels of estrogen and progesterone were measured during menstruation and ovulation. The blood test was done to estimate the hormone levels and the orthodontic tooth movement was measured using digital Vernier caliper. Results: Statistical results showed significant difference in the orthodontic tooth movement during menstruation and ovulation phase (p =0.01). When hormone levels decreased i.e. during menstruation, tooth movement due to orthodontic force was accelerated when compared to the ovulation group where the hormone levels were increased. Limitations: The sample size of 24 may not be sufficient to represent the entire population. Therefore further studies are required with a greater sample size to extrapolate the findings to the whole population. Blood samples were collected from all the 24 female participants which was an invasive procedure. Conclusion: Orthodontic tooth movement was accelerated during menstruation phase (decreased hormone levels) when compared to the ovulation group (increased hormone levels). Clinicians could seek advantage of this concept while treating female patients to reduce the treatment duration as well as achieve better patient acceptance

Keywords: Estrogen, progesterone, orthodontic tooth movement, menstruation, ovulation.

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