The Metaphyseal Centering Technique (Reverse Shoulder Replacement Arthroplasty)

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The Metaphyseal Centering Technique (Reverse Shoulder Replacement Arthroplasty)

By Scott Humphrey 9 Videos

372 views

June 28, 2022

The Metaphyseal Centering Technique (MCT) is a prosthesis-specific method is presented for orienting a reverse ...
read more ↘ shoulder humeral component (AltiVate Reverse, Enovis, Austin, TX). With the MCT, priority is given to the positioning of the shell portion of the prosthesis over that of the stemmed portion during bone preparation. To ensure that a centralized shell position is achieved within the proximal humerus bone in patients with extreme posterior and medial offset measurement values, the stem portion of the humeral prosthesis is sometimes purposely undersized and positioned eccentrically within the humeral diaphysis. Bone autograft is used in such cases to improve the fit and fixation of the stem within the humeral canal. The metaphyseal-centering technique facilitates: (1) consistent positioning of the shell portion of the humeral prosthesis relative to the center of rotation of the humeral head, and (2) conversion from a standard to a reverse prosthesis, or vice versa, during revision surgery without the need for stem removal or alteration of the humerus bone.
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