Which statement about vaultlock and standard glenoid components is true?

• A. The radius of curvature differs between vaultlock and standard glenoid components
• B. The radius of curvature is the same
• C. Vaultlock uses no central peg
• D. Vaultlock trial components are identical to standard

Answer: (A)

The key idea is how glenoid geometry affects articulation. The radius of curvature (how curved the glenoid surface is) determines how the humeral head sits and moves against the glenoid component. VaultLock is a distinct glenoid design with its own locking interface and seating geometry, and this design requires a different curvature from standard glenoids to preserve smooth articulation and distribute loads properly. Because the VaultLock and standard glenoids are not identical in how they curve, their radii of curvature are not the same. That’s why the statement about their different radii is true.