4D Photopolymer Actuation: Qualification Limits for Biomedical Translation

Two topical sources report soft or thermoresponsive DLP actuators [1,2], while a third studies printing and post-curing of a passive polymeric stent [3]. No retained source demonstrates a vat-printed 4D actuator operating in a biological medium with blocked force or work output and cycle life. This note therefore presents qualification limits, not clinical evidence. RP-02 defines the shared evidence-to-decision and qualification method and is not reproduced here. The corrected public 4Dresyn F-HV1 TDS v1.4 was verified byte-for-byte against the controlled local copy on 21 August 2026.