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J Bone Joint Surg Br. 2010 Oct;92(10):1410-5. doi: 10.1302/0301-620X.92B10.23578.

Mid-term results of a metal-backed glenoid component in total shoulder replacement.

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  • 1Shoulder and Elbow Unit, IRCSS Istituto Clinico Humanitas, 56 Via Manzoni 20089, Rozzano, MI, Italy.


Total shoulder replacement is a successful procedure for degenerative or some inflammatory diseases of the shoulder. However, fixation of the glenoid seems to be the main weakness with a high rate of loosening. The results using all-polyethylene components have been better than those using metal-backed components. We describe our experience with 35 consecutive total shoulder replacements using a new metal-backed glenoid component with a mean follow-up of 75.4 months (48 to 154). Our implant differs from others because of its mechanism of fixation. It has a convex metal-backed bone interface and the main stabilising factor is a large hollow central peg. The patients were evaluated with standard radiographs and with the Constant Score, the Simple Shoulder Test and a visual analogue scale. All the scores improved and there was no loosening, no polyethylene-glenoid disassembly and no other implant-related complications. We conclude that a metal-backed glenoid component is a good option in total shoulder replacement with no worse results than of those using a cemented all-polyethylene prosthesis.

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