Zaldiva-Chapa et al. showed that, in the long run, there were no differences between conducting surgical or non surgical treatment since, after a year, results obtained with bothtreatmenttypes were similar.
Respecto al tratamiento quirúrgico, Zaldivar-Chiapa y cols. demostraron que no hay diferencias a largo plazo entre este tipo de tratamiento y el no quirúrgico, ya que después de un año se obtienen resultados similares.