Glenoid Base Plate
Glenoid Base Plate - Related Videos
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13:29
Jet Impinging on an Inclined Plate
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2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI The goal of this experiment is to demonstrate how a fluid flow exerts forces on structures by conversion of dynamic pressure into static pressure. To this end, we will make a plane jet impinge on a flat plate and will measure the resulting pressure distribution along the plate. The resultant force will be estimated by integrating the product between the...
FAQs
The central peg or post establishes fixation through the prepared glenoid region, while peripheral screws add additional attachment around the plate. Together, these features help transfer joint forces into the scapula and resist component migration. Their combined function is important because inadequate force distribution or fixation could contribute to loosening and compromise the reconstructed shoulder’s stability.
Design and placement determine how the implant sits against the prepared glenoid surface and how forces travel into the scapula. Appropriate alignment supports stable glenosphere attachment and helps limit loosening or migration. Because positioning also influences shoulder mechanics, it can affect postoperative range of motion and the durability of the reconstruction.
The scapula provides the supporting bone for the reconstructed glenoid side of the joint. A properly fixed plate channels joint forces through its central and peripheral fixation features into that bone rather than allowing excessive component movement. This relationship matters clinically because stable force transfer supports implant retention, shoulder function, and longer-term surgical results.
The glenoid surface is first prepared to receive the implant. The base plate is then positioned on that surface and secured to the scapula using its central peg or post together with peripheral screws. After fixation, the glenosphere is anchored to the plate, creating the glenoid-side foundation used in reverse total shoulder arthroplasty.
This implant is used primarily when conditions have impaired normal shoulder mechanics and require reverse total shoulder arthroplasty. Important clinical settings include rotator cuff tear arthropathy, complex fractures, arthritis, and other disorders affecting shoulder function. In these situations, the plate provides the fixation foundation needed for glenosphere-based joint reconstruction.
Fixation and alignment are closely related to implant stability, range of motion, and long-term surgical outcomes. Secure attachment helps limit loosening and component migration, while accurate positioning supports the intended mechanics of the reconstructed shoulder. Consequently, assessment of the plate’s stability and alignment is central to understanding how well the reconstruction may function over time.