public function run()
 {
     DB::table('odontologos')->delete();
     Odontologo::create(array('id' => 1, 'nombres' => 'Martin', 'apellido' => 'Palermo', 'matricula' => 'MN 123456', 'created_at' => new DateTime(), 'updated_at' => new DateTime()));
     Odontologo::create(array('id' => 2, 'nombres' => 'Guillermo', 'apellido' => 'Barros Schelotto', 'matricula' => 'MN 654321', 'created_at' => new DateTime(), 'updated_at' => new DateTime()));
     for ($i = 3; $i < 1000; $i++) {
         $mn = 999000 + $i;
         Odontologo::create(array('id' => $i, 'nombres' => 'Nombre-' . $i, 'apellido' => 'Apellido-' . $i, 'matricula' => 'MN ' . $mn, 'created_at' => new DateTime(), 'updated_at' => new DateTime()));
     }
 }