ArticleClinics in shoulder and elbow2025
Do radiolucent lines in uncemented glenoid implants appear and disappear with x-ray beam tilting? A cadaveric radiographic study.
Article in Clinics in shoulder and elbow, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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5 authors.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundThis cadaveric study investigated whether radiolucent lines (RLLs) in x-rays of uncemented polyethylene (PE) glenoid implants with a thin titanium layer at the back can appear or disappear due to tilting of the x-ray projection.
methodsEight RM Pressfit Vitamys glenoids (Mathys) were implanted in cadaveric scapulae. A computed tomography (CT) scan confirmed where the PE implant was flush with bone and where a gap was present. In addition to the 0° projection as a starting point, the glenoid was tilted in 10° and 20° retro- and anteversion and superior and inferior tilt directions. The glenoid was subdivided into five zones. Each zone was quantified with no RLLs or RLLs.
resultsIn all zones, tilting from 0° to 10° inferior tilt (P=0.028), 10° retroversion (P<0.001), and 20° anteversion (P<0.001) caused RLLs to appear or disappear. Tilting from 0° to 20° inferior tilt (P=0.087), 10° (P=0.218) and 20° superior tilt (P=0.484), and 10° anteversion (P=0.126) did not cause any RLLs to appear or disappear. The RLLs always disappeared at 20° retroversion.
conclusionsTrue anteroposterior images should be obtained during x-ray assessment following uncemented glenoid component implantation. A CT scan is advised to confirm or exclude the presence of RLLs. Level of evidence: Laboratory cadaveric study.
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