Part I: History of Reverse Shoulder Arthroplasty -- Origins of Reverse Shoulder Arthroplasty and Common Misconceptions -- Part II: Biomechanics and Basic Science of Selected Leading Research Centers -- Shoulder Biomechanics: Charité University of Medicine, Berlin, Germany -- Biomechanics of the Reverse Shoulder Arthroplasty -- Reverse Shoulder Biomechanics: The Research Performed at the Foundation for Orthopaedic Research and Education (FORE) -- Design Optimization and Prosthesis Classification: Bordeaux-Merignac Sport Clinic, Bordeaux-Merignac, France -- Motion and Muscular Function after Reverse Shoulder Arthroplasty -- Biomechanics of the Normal and Reverse Shoulder -- Biomechanics of the Reverse Total Shoulder Replacement: The Hospital for Special Surgery Perspective -- Analysis of Reverse Total Shoulder Arthroplasty Biomechanics Using a Dynamic Shoulder Simulator -- Biomechanics of Reverse Shoulder Arthroplasty: Contribution of Computer Modelling -- Kinematic Analyses of Patients with Reverse Shoulder Arthroplasty -- Implant Retrieval: Drexel University, Philadelphia, Pennsylvania, USA -- Part III: Clinical Uses -- Reverse Shoulder Arthroplasty for Massive Rotator Cuff Tears Without Glenohumeral Arthritis -- Massive Rotator Cuff Arthropathy with Glenohumeral Arthritis -- Intact Rotator Cuff -- Reverse Shoulder Arthroplasty in the Setting of Proximal Humeral Fracture -- Reverse Shoulder Arthroplasty in the Setting of Scapula Fractures -- RSA with Glenoid Bone Loss -- Reverse Shoulder Arthroplasty in Patients with Preoperative Deltoid Impairment -- Reverse Total Shoulder Arthroplasty in the Setting of Infection -- Reverse Shoulder Arthroplasty in the Setting of Proximal Humeral Bone Loss -- Conversion of Failed Hemiarthroplasty to Reverse Total Shoulder Arthroplasty: Indications, Techniques, and Outcomes -- Reverse Prosthesis and the Failed Total Shoulder Arthroplasty -- Revision Reverse Total Shoulder Arthroplasty -- Proximal Humerus Tumors -- Massive Irreparable Rotator Cuff Tears: How to Rebalance the Cuff-Deficient Shoulder? -- Influence of Arm Lengthening in Reverse Shoulder Arthroplasty -- How to Handle the Humeral Side -- Rehabilitation and Activity Expectations following RSA -- Complications Associated with RSA -- Part IV: Current Industry Devices and Surgical Techniques -- Arthrex Univers Revers™ Shoulder Prosthesis -- Aston Medical Duocentric® Reversed Prosthesis: Proposition of New Glenoid Component Design to Prevent Scapular Neck Notching -- The Biomet Comprehensive© Reverse Total Shoulder System: Design Considerations and Surgical Techniques -- Depuy Synthes: Joint Reconstruction: DELTA XTEND Reverse Shoulder Prosthesis -- DJO Surgical Reverse™ Shoulder Prosthesis (RSP™) -- Design Features and Surgical Technique of The Scultra II Reverse Prosthesis -- Evolutis UNIC Reverse Shoulder Prosthesis -- Exactech Equinoxe RTSA Platform Shoulder System Design Rationale -- FH Orthopedics Arrow Universal Shoulder Prosthesis -- Verso® Stemless Bone Preserving Reverse Geometry Total Shoulder Replacement: (Innovative Design Orthopaedics Ltd.) -- The Integra® Titan™ Reverse Shoulder System -- The SMR ® Shoulder System of Lima Corporate -- Mathys Affinis® Inverse -- The Bayley/Walker Prosthesis: Stanmore Implants Worldwide -- Tornier Aequalis AscendTM Flex Convertible Shoulder System -- Zimmer Reverse Total Shoulder Arthroplasty -- Part V: Economic Value -- Value and Reverse Total Shoulder Arthroplasty: The Foundation for Orthopaedic Research and Education Perspective -- Value and Reverse Total Shoulder Arthroplasty: The Boston Shoulder Institute Perspective.