BHID is the first cranial fixation system based on shape memory materials, designed to be lodged in the burr hole. BHID consists of an upper and a lower platform, bound by a nitinol spring, located in the epicranial and epidural spaces respectively.

Nitinol is a nickel-titanium alloy with the following main features:

BHID makes use of nitinol's shape memory in order to perfectly refix to the skull the bone flap resulting from a craneotomy. After the application of warm physiological serum (or after allowing a reasonable time for the patient's body temperature to affect the implant), the stretched device returns to its original shape. As it is designed to always go back to the minimum height state, it puts pressure on both the bone flap and the cranium and, as a result, the flap is immobilized.

Adobe Flash Player not installed or older than 9.0.115!