private void btnToothWidth_Click(object sender, EventArgs e)
        {
            FrmToothWidthCoefficient frm = new FrmToothWidthCoefficient();

            frm.Show();
        }
 private void btnToothWidth_Click(object sender, EventArgs e)
 {
     FrmToothWidthCoefficient frm = new FrmToothWidthCoefficient();
     frm.Show();
 }