The 32-year-old female driver, who lost her left eye in the incident, suffered serious skull, brain and face injuries earlier this year during a day of straightline testing for Marussia at a UK airfield.
She is quoted by the Spanish sports daily Marca as revealing she has "five plates" in her head as a result of the impact with the truck loading ramp, "and they are still not all positioned quite right".
And a second forthcoming operation, she explained, is to remedy a problem with the "limited" movement of her mouth, caused by muscle atrophy.
The Spaniard said surgeons intend to fix the problems "in one or two operations, if possible".
De Villota insisted: "I have never lost my good mood as I think that everything is for the better."