It is as well longitudinal because the study encompasses patients subject of surgical intervention during the period from 1991 to 2001. 1 The independent variable is the degree of bone integration developed in patients subject of a graft.
1 El 80% de las reconstrucciones de FNA con injerto secundario de cresta iliaca realizadas por el Servicio de CMF en el HIM, desarrollaron algún grado de integración ósea.