Summary
Tuberosity osteosynthesis in shoulder arthroplasty remains a challenging problem: there is a high rate of nonunion or malunion and the number of failures is underdiagnosed. Proper synthesis of the tuberosities is closely linked to good positioning of the prosthesis with regard to length and retroversion. Nonunion of the tuberosities may be due to early or secondary bone migration because of malpositioning of the prosthesis and/or poor technique with tuberosity osteosynthesis. Migration of the tuberosities occurs either because there is excessive horizontal tension, if the prosthesis has been positioned in too much retroversion; excessive vertical tension, if the prosthesis has been cemented too high or by excessive oblique tension, if the stem has been cemented in valgus which shifts the upper part laterally, prevents intertuberosity contact, and causes over-tensioning.
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Le Huec, J.C., Boileau, P., Sinnerton, R., Hovorka, I. (1999). Tuberosity Osteosynthesis in Shoulder Arthroplasty. In: Walch, G., Boileau, P. (eds) Shoulder Arthroplasty. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-58365-0_35
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DOI: https://doi.org/10.1007/978-3-642-58365-0_35
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