Medical Devices and Medical Equipment Design SureMAX Cervical Implant by Additive Implants Inc. SureMAX is the first Titanium spinal implant that has a stiffness that matches the individual's bone stiffness as not to damage it once implanted. Bone loves to grow into Titanium but legacy Titanium cages have been limited because they are too stiff and damage the bone once implanted. SureMAX has solved this problem through using 3D print technology with geometries that are not machinable. It also has a porous roughen surface to encourage bone to grow into it. The 'diving' boards on SureMAX adjust to the patient's bone stiffness to assure the best fit and performance.