The aim of the surgical technique is the stable fixation of aglenoid baseplate and reconstruction of bone loss with correction of version, inclination, and medialization of the joint line. Significant glenoid bone loss due to glenoid loosening or wear in revision shoulder arthroplasty. Active infection, inoperability due to poor health condition. Reconstruction of advanced glenoid bone stock in case of glenoid loosening of total shoulder arthroplasty can be performed either with autografts and allografts or metallic augmentation together with reverse baseplates in aone- or two-stage procedure. The preferred fixation mode was atransfixation technique using autograft and baseplates with extra-long coated or threaded post with 2-4locking screws. Baseplates with an extended post and locking screws adjustable in various inclination are required to achieve fixation along the "3-column concept" which is used by the authors based on a recently introduced classification algorithm, which is based on the remaining bone stock available for fixation of the post in native bone stock. The standard protocol with an abduction brace for 6weeks and passive exercises is modified, depending on the extent of reconstruction on the humeral and glenoid side, and the type of implant. In all, 145 cases of revision total shoulder arthroplasty suffering from moderate or advanced bone loss were retrospectively evaluated and 95followed up for a mean of 2.7years (range 1-7years). We classified the remaining bone stock as grade 4 or 5 in 61patients and grade 2 and 3 in 84patients. Our preferred surgical technique was cementless fixation of structural bone grafts using areverse baseplate in transfixation technique. In all, 56cases required substantial iliac crest bone grafts, of which 36patients were operated on in a2-stage procedure. In 20patients the bone defect in the iliac crest was secured by alocking plate in order to avoid afatigue fracture of the anterior iliac spine. Only in 5cases with intact rotator cuff was an anatomical "platform" component used; the remaining cases were converted to reverse shoulder arthroplasty. Asuccess rate of more than 90% for both one- and two-stage reconstructions, which is mainly related to the high rate of incorporation of autografts taken from the iliac crest, is comparable to the majority of data published in the literature.