Abstract: A surgery simulation system includes an anatomical model with one or more apertures, at least one surgical tool having a part which is movable though the one or more apertures, a first virtual reality system having a computer system and a set of tracking sensors, and a second virtual reality system that includes the computer system and one or more proximity sensors which are located at the one or more apertures. The computer system is configured to generate a first virtual reality model and a second virtual reality model. A method for simulating a surgery is also disclosed.

Abstract: An extended deltoid tensioning humeral head which includes a humeral prosthetic and a deltoid tensioning device to replace a shoulder joint for a patient that may be suffering from shoulder arthritis or poor rotator cuff functionality. The humeral prosthetic consists of a humeral head and a humeral stem to replace the humerus of the patient. The deltoid tensioning device provides a means to tension the muscle fibers of the deltoid providing increased abduction motion of the arm. The extended deltoid tensioning humeral head provides an anatomical alternative for the replacement of a shoulder joint opposed to the reverse total shoulder arthroplasty.