Bone fixation is a surgical procedure that stabilizes and fix bone grafts and bone filling materials for the regeneration of bone. Bone fixation screws are especially used for internal bone fixation.
Bone densitometer is an advanced form of X-ray technology that is used for the measurement of bone loss. Bone loss is measured by using established bone mineral density measuring standards.
The need of the bone cement and cast is due to the requirement of materials that effectively absorb body forces acting on the human hips. 
Blood collection, processing, management devices and consumables are medical devices used to collect whole blood from donors, and separate it into blood components such as RBC, WBC, platelets, and plasma. 
Surgical lamp also called as operating light or surgical light head is a medical device used to deliver visible illumination of the surgical field.