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Co-Cr-Mo modular devices are shown: (A) Bionik®, (B) GMRS®, and (C) Margron®. Macroscopic images are shown of (D) the Bionik® neck-stem trunion, (E) the GMRS® proximal neck-stem and distal trunion, and (F) the Margron® neck-stem trunion. Microscopic images (original magnification, ×10) are shown of (G) the Bionik® neck-stem trunion, (H) the GMRS® neck-stem trunion, and (I) the Margron® neck-stem trunion.
