Intervention: In group 1, 31 patients were treated with either a Neer or Aequalis shoulder prosthesis using nonabsorbable sutures and no bone graft for the reattachment of the tuberosities.

• 干预：第1组，31名病人接受Neer或Aequalis人工肩关节置换术治疗，使用非吸收性缝线和非植骨肱骨结节复位法。