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Reverse Shoulder Replacement:

- Discussion:
- designed to transfer the center of rotation of the humerus medially and to lengthen the humerus (efficient deltoid lever arm)
- The anterior deltoid's importance in reverse shoulder arthroplasty: a cadaveric biomechanical study.
- Axial Rotation Moment Arms of the Shoulder Musculature After Reverse Total Shoulder Arthroplasty
- Medialized Versus Lateralized Center of Rotation in Reverse Shoulder Arthroplasty

- Glenoid Component:
- screw insertion and direction:
- note that scapular spine fractures can occurr from screw insertion;
- references:
- Glenoid screw position in the Encore Reverse Shoulder Prosthesis: an anatomic dissection study of screw relationship to surrounding structures.
- Scapular fractures after reverse shoulder arthroplasty: evaluation of risk factors and the reliability of a proposed classification.
       - medial / lateral offset:
- deltoid - preop quality:
                      - Preoperative deltoid assessment by contrast-enhanced ultrasound (CEUS) as predictor for shoulder function after reverse shoulder arthroplasty: a prospective pilot study.
- The effect of deltoid lengthening on functional outcome for reverse shoulder arthroplasty.

- Lateralized Reverse Shoulder Arthroplasty Maintains Rotational Function of the Remaining Rotator Cuff.
- A reverse shoulder arthroplasty with increased offset for the treatment of cuff-deficient shoulders with glenohumeral arthritis.
- Avulsive Axillary Artery Injury in Reverse Total Shoulder Arthroplasty
- Reverse shoulder arthroplasty. Part 1: Systematic review of clinical and functional outcomes.
- Do less medialized reverse shoulder prostheses increase motion and reduce notching?
- Restoration of External Rotation Following Reverse Shoulder Arthroplasty without Latissimus Dorsi Transfer.
               - Lateralized Center of Rotation and Lower Neck-Shaft Angle Are Associated With Lower Rates of Scapular Notching and Heterotopic Ossification and Improved Pain for Reverse Shoulder Arthroplasty at 1 Year.
- Does arm lengthening affect the functional outcome in onlay reverse shoulder arthroplasty?

- inferior tilt: 

               - Inferior tilt of the glenoid component does not decrease scapular notching in reverse shoulder arthroplasty: results of a prospective randomized study.
        - inferior shift offest:  
- The effect of glenosphere diameter and eccentricity on deltoid power in reverse shoulder arthroplasty.
- Bony increased-offset reversed shoulder arthroplasty: minimizing scapular impingement while maximizing glenoid fixation.
- Inferior glenosphere placement reduces scapular notching in reverse total shoulder arthroplasty.

- Humeral Component:
       - design:
- Can functional difference be detected in reverse arthroplasty with 135℉ vs 155℉ prosthesis for the treatment of rotator cuff arthropathy: a prospective randomized study.

        - humeral retroversion:  (see humeral prep for TSA)
- Effect of deltoid tension and humeral version in reverse total shoulder arthroplasty: a biomechanical study.
- Effect of humeral component version on impingement in reverse total shoulder arthroplasty
- The effect of component positioning on intrinsic stability of the reverse shoulder arthroplasty .
- Lesser tuberosity is more reliable than bicipital groove when determining orientation of humeral head in primary shoulder arthroplasty.
- Cadaveric study of anatomical relationship between greater tuberosity and prosthetic fin in humeral head replacement.
- Bicipital groove orientation: considerations for the retroversion of a prosthesis in fractures of the proximal humerus.
- Comparison of humeral head retroversion with humeral axis/biceps groove relationship: study in live and cadavers.
                 - The use of the bicipital groove for alignment of the humeral stem in shoulder arthroplasty
- Combined effect of change in humeral neck-shaft angle and retroversion on shoulder range of motion in reverse total shoulder arthroplasty - A simulation study.
                 - Effects of humeral component retroversion on functional outcomes in reverse total shoulder arthroplasty for cuff tear arthropathy.
- The effect of humeral version on teres minor muscle moment arm, length, and impingement in reverse shoulder arthroplasty during activities of daily living.
- Effects of humeral tray component positioning for onlay reverse shoulder arthroplasty design: a biomechanical analysis.
- Influence of glenoid component design and humeral component retroversion on internal and external rotation in reverse shoulder arthroplasty: a cadaver study.
                 - Evaluation of the role of glenosphere design and humeral component retroversion in avoiding scapular notching during reverse shoulder arthroplasty.
- Effect of Humeral Component Version on Outcomes in Reverse Shoulder Arthroplasty.

- Other:
- subscapularis repair:
- Complication rates, dislocation, pain, and postoperative range of motion after reverse shoulder arthroplasty in patients with and without repair of the subscapularis.
- Subscapularis insufficiency and the risk of shoulder dislocation after reverse shoulder arthroplasty..
- Reverse shoulder arthroplasty without subscapularis repair for the treatment of proximal humeral fractures in the elderly.
- Subscapularis Repair Is Unnecessary After Lateralized Reverse Shoulder Arthroplasty

        - fracture considersations:
- considerations include use of the 42 mm prosthesis, tuberosity repair, and optimizing soft tissue tension;
- in the study by Rais et al, the authors noted scapular notching in 50 % of patients.
- cemented vs press fit:
- Cemented or cementless humeral fixation in reverse total shoulder arthroplasty? a systematic review.
- Reverse shoulder arthroplasty for proximal humerus fracture using a dedicated stem: radiological outcomes at a minimum 2 years of follow-up-case series.
- Cemented or cementless humeral fixation in reverse total shoulder arthroplasty?
                - instability:
- Revision surgery of reverse shoulder arthroplasty.
- Reverse shoulder arthroplasty for the treatment of nonunions of the surgical neck of the proximal part of the humerus (type-3 fracture sequelae).
- tuberosities:
- Reverse shoulder arthroplasty for acute proximal humerus fractures: a systematic review.
- Indications, technique, and pitfalls of reverse total shoulder arthroplasty for proximal humerus fractures
- Is failure of tuberosity suture repair in hemi-arthroplasty for fracture mechanical?
- misc:
- Bicipital groove orientation: considerations for the retroversion of a prosthesis in fractures of the proximal humerus.
- Reverse Shoulder Arthroplasty for Malunions of the Proximal Part of the Humerus (Type-4 Fracture Sequelae)

- Post Operative Care:
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- Complications:
- Complications with reverse total shoulder arthroplasty and recent evolutions
- Management of complications after reverse shoulder arthroplasty

       - Fractures:
- Periprosthetic humeral fractures during shoulder arthroplasty.
- What Are Risk Factors for Intraoperative Humerus Fractures During Revision Reverse Shoulder Arthroplasty and Do They Influence Outcomes?
- Successful treatment of fractures of the base of the acromion after reverse shoulder arthroplasty: Case report and review of the literature.
- Classification of postoperative acromial fractures following reverse shoulder arthroplasty.
- [Treatment of acromion base fractures with double plates internal fixation].
- Scapular fractures after reverse shoulder arthroplasty: evaluation of risk factors and the reliability of a proposed classification.
- Acromial fracture after reverse shoulder arthroplasty.

- Neurovascular Complications:
- Prevalence of neurologic lesions after total shoulder arthroplasty.
- Avulsive Axillary Artery Injury in Reverse Total Shoulder Arthroplasty

- Instability:
- Reverse shoulder arthroplasty for the treatment of nonunions of the surgical neck of the proximal part of the humerus (type-3 fracture sequelae).
- Instability after reverse total shoulder replacement.
- Postoperative acromion base fracture resulting in subsequent instability of reverse shoulder replacement
- Dislocation following reverse total shoulder arthroplasty.

- Biomet Shoulder