Acute scaffold disruption and late discontinuities

The current BRSs are composed of either a polymer or bioresorbable metal alloy. The key mechanical traits for candidate material in coronary indications include high elastic moduli to impart radial stiffness, large break strains to impart the ability to withstand deformations from the crimped to expanded states, and low yield strains to reduce the amount of recoil and overinflation necessary to achieve a target deployment. Primarily due to the mechanical properties of the selected materials, however, the functionality of the bioresorbable scaffold is somewhat limited (Table 8.5.1).

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