Abstract: An interbody spacer for use in spinal procedures. The interbody spacer has one or more surfaces with a unique surface pattern. The interbody spacer is preferably designed for use as an intervertebral spacer in spinal fusion surgery, where portions of an affected disc are removed from between two adjacent vertebrae and replaced with an interbody spacer that provides segmental stability, may correct a deformity, and allows for bone to grow between the two vertebrae to bridge the gap created by disk removal. The interbody spacer has one or more unique surfaces designed to aid in bone growth and attachment. The unique surface comprises one or more surface projections, referred to generally as surface projection pattern or matrix, which can be arranged to form unique patterns and structures.

Abstract: This surgical instrumentation assembly is for positioning a shoulder prosthesis, the shoulder prosthesis comprising a patient-specific shoulder implant adapted to fit onto a glenoid cavity of the scapula of a patient. The assembly comprises a patient-specific impacting device having an underside surface congruent with the glenoid cavity of the scapula of the patient, said underside surface being provided with protrusions adapted to perforate the cortical bone of the scapula upon impact of the impacting device against the scapula by a one-sided translation movement.