Figure 2

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Humeral zones for standard-length and short humeral stems according to the Gruen classification [40] adapted to the shoulder are used to locate sites of osteolysis, radiolucent lines, and stress shielding. (A) Anteroposterior view and (B) Axillary view of standard-length stem (>100 mm). (C) Anteroposterior view and (D) Axillary view of short stem (<100 mm).
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