Reverse shoulder arthroplasty is an effective method for treating end-stage degenerative shoulder diseases and severe shoulder trauma.Early researchers found that complications such as acromial fracture,inferior glenohumeral impingement,and external rotation limitation may occur during the use of reverse shoulder prosthesis.Additionally,during shoulder joint move-ments,the shear forces between the bone-implant(glenoid-baseplate)interface increase,leading to a higher risk of prosthesis loos-ening and dislocation.In order to reduce the incidence of complications after reverse shoulder arthroplasty,the modified reverse shoulder prosthesis was developed,and a variety of prostheses were derived from it.The main direction of improvement was to shift the rotation center of the prosthesis system.The center of rotation for external displacement can be set on the glenoid side of the scapula,the humeral side,or both sides simultaneously modified.Modified prostheses can be classified according to the site of external translation and the size of the humeral offset.The stability and movement ability of the reverse shoulder prosthesis depend on the deltoid muscle.Even if the rotator cuff is injured,it does not affect the shoulder joint movement,so the patient's postopera-tive satisfaction is high.Through the non-anatomical design of a fixed rotation center,a semi-restrictive stable structure is formed,and the implant geometry can form a more stable joint between the humeral head and the glenoid,reducing the incidence of gle-noid prosthesis loosening and implant failure.Reverse shoulder arthroplasty is not suitable for all patients.For patients without sig-nificant rotator cuff dysfunction,forward shoulder arthroplasty is still the preferred surgical procedure to restore the natural anato-my and shoulder kinematics.Surgeons should conduct a comprehensive analysis of the patient's functional status,needs,and indi-vidual anatomy to determine the optimal surgical approach.
维普
万方数据