In　this　study,　we　fabricated　poly(3-hydroxybutyrate-3-hydroxyvalerate)　(PHBV)　coatings　doped　with　Gd3+　(1,　5,　and　10　x　10(-4)　mol/L)　on　Ti6Al4V　alloy　for　the　first　time　to　promote　soft　tissue　sealing　around　dental　implants.　The　corrosion　resistance　of　Gd3+-modified　PHBV-coated　Ti6Al4V　was　studied　by　electrochemical　and　immersion　tests,　respectively,　whereas　CCK-8　and　RT-PCR　evaluated　the　biocompatibility　to　human　gingival　fibroblasts　(HGFs)　and　human　umbilical　vein　endothelial　cells　(HUVECs).　It　was　found　that　the　Gd3+-modified　PHBV　coating　could　enhance　the　corrosion　resistance　of　Ti6Al4V.　In　vitro　cell　tests　showed　that　PHBV　coatings　with　and　without　Gd3+　addition　could　promote　adhesion　and　proliferation　of　HGFs　and　HUVECs,　showing　a　Gd3+　content-dependent　manner.　Moreover,　it　was　found　that　the　PDA-PHBV@1Gd　showed　the　best　proliferation　to　HGFs　by　up-regulating　gene　expressions　of　VINCULIN,　ITGB1,　and　ITGA3,　whereas　the　best　response　to　HUVECs　with　the　highest　gene　expression　of　eNOS　and　HIF-1　alpha　genes　was　found　in　the　PDA-PHBV@5Gd-coated　group.