a How many patients have developed bone integration with secondary nasoalveolar grafts of the iliac crest in surgical interventions performed at the Mexico's Children's Hospital's maxillofacial service during 1991 to 2001?
a ¿Cuántos pacientes han desarrollado integración ósea a partir de INA secundarios de cresta iliaca, intervenidos por el Servicio de CMF del HIM de 1991 a 2001?