1. An orthopedic device for a shoulder joint comprising: a patient-specific alignment guide including: a cap having a three-dimensional engagement surface customized in a pre-operative plan by computer imaging to be complementary and closely mate and conform to a humeral head of a proximal humerus of a specific patient; an elongated tubular element extending from the cap and defining a longitudinal guiding bore for guiding an alignment pin at a patient-specific position and an orientation determined in the pre-operative plan; and an orientation feature on the cap, the orientation feature designed to orient the cap relative to the humeral head when the orientation feature is aligned with a landmark of the proximal humerus.