General characteristics of the MPHT system The proximal humeral nail (MPHT: multilocking proximal humeral treatment nail) is mainly for the humeral’s head fracture and fracture of the stem directly below the head. The fracture segments could be fix into four planes at one time, with this method the most common tuberculum maius, tuberculum minus and the cartilaginous head can be fixable. Solid and cannulated versions are also available. The distal locking is enable by targeting arm. Anatomical fitting The nail was designed according to the real bone anatomy in the three-dimensional features. Proximal end is available with two types of diameters. The shaft, which is fitted to the section of the diaphysis, is growing thin. In order to the easy insert, the nails are bent, but they can be used for the left of the right hand side. The head of the screws ensures a good pressure balance, preventing the further cracks in the head.