Glenoid Component Loosening in Anatomic Total Shoulder Arthroplasty: Association between Radiological Predictors and Clinical Parameters—An Observational Study

Figures

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  Figure 1. Anteroposterior measurements are illustrated on radiographs. The black line connects the superior and inferior rim of the glenoid (G) and is taken as the base for the joint gap width (black line to the right), which is the parallel line crossing the most medial part of the humeral head (HH) prosthesis. Positive values were given when the humeral head appeared more laterally relative to the drawn line, and negative values were given when more medially, respectively. The lateral humeral offset (LHO) is the distance (mm) measured from the drawn baseline to the parallel crossing the most lateral point of the greater tubercle. Acromiohumeral distance (AHD) is from the caudal point of the acromion perpendicular to the apex of the humeral head [28,29]. JG and LHO indicate a mediolateral shift of the humeral head, whereas the AHD represents cranialization.

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  Figure 2. Study flow-chart.

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  Figure 3. (A) Constant score (CS) and (B) Subjective shoulder value (SSV) over time. A large and clinically relevant decline is seen at 5 years follow-up for both outcomes. Abbreviations: BL, baseline; mo, months; y, year; CS, constant score; SSV, subjective shoulder value.

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  Figure 4. Progression of medialization and cranialization over time. Anteroposterior radiographs with the patient positioned in internal rotation. Images depict time points immediately after surgery (baseline, BL) and follow-ups after six months (6 mo) and one, two, and five years later (from top left to bottom right).