Objective: To investigate the effects of electrochemically dealloying of Ti6Al4V abutments on human gingival fibroblasts (HGFs) and to provide experimental evidence for surface modification of implant abutments. Methods: The samples were divided into an NC group (negative control, no other treatment on a smooth surface), an NM-1 group (nanomesh-1, electrochemical dealloying treatment in 1 mol/L NaOH 1 h on 2 V voltage), and an NM-2 group (nanomesh-2, electrochemical dealloying treatment in 5 mol/L NaOH 1 h on 2 V voltage). The surface morphologies of the samples and the adhesion of HGFs on the sample surfaces were observed with scanning electron microscopy (SEM). The surface hydrophilicities of the samples were measured with a contact angle measuring instrument. The proliferation of HGFs on the different samples were evaluated with CCK-8, and the expression of adhesion-related genes, including collagen Ⅰ (COL1A1), collagen Ⅲ (COL3A1), fibronectin 1 (FN1), focal adhesion kinase (FAK), vinculin (VCL), integrin α2 (ITGA2), and integrin β1 (ITGB1), on the different samples was measured with qRT-PCR. The expression of vinculin on the surfaces of HGFs was observed via confocal laser scanning microscopy (CLSM) after immunofluorescent staining. Collagen fiber secretion and syntheses of HGFs from different samples were evaluated via Sirius red staining. Results: SEM revealed the formation of ordered and uniform three-dimensional mesh structures on the surfaces of the NM-1 and NM-2 groups, with grid diameters of approximately 30 nm for the NM-1 group and approximately 150 nm for the NM-2 group. Compared with that of the NC group, the water contact angles of the NM-1 group and NM-2 groups were significantly lower (P<0.000 1). Cell proliferation in the NM-1 group was significantly greater than that in the NC group (P<0.01). Moreover, there was no significant difference in the water contact angles or cell proliferation between the NM-1 group and the NM-2 group. SEM revealed that HGFs were adhered well to the surfaces of all samples, while the HGFs in the NM-1 and NM-2 groups showed more extended areas, longer morphologies, and more developed pseudopodia than did those in the NC group after 24 h. qRT-PCR revealed that the expression levels of the adhesion-related genes COL1A1, COL3A1, FN1, FAK and VCL in the NM-1 group were significantly greater than those in the NC and NM-2 groups (P<0.01). The expression of vinculin protein in the NM-1 group was the highest, and the number of focal adhesions was greatest in the NM-1 group (P<0.01). The results of Sirius red staining showed that the NM-1 group had the highest secretion and syntheses of collagen fibers (P<0.000 1). Conclusion The three-dimensional nanomechanical structure of Ti6Al4V modified by electrochemical dealloying promoted the adhesion, proliferation, collagen fiber secretion and syntheses of HGFs, and electrochemical dealloying of Ti6Al4V with a grid diameter of approximately 30 nm obviously promoted HGF formation.

Objective To investigate the effects of electrochemically dealloying of Ti6Al4V abutments on human gingival fibroblasts(HGFs)and to provide experimental evidence for surface modification of implant abutments.Methods The samples were divided into an NC group(negative control,no other treatment on a smooth surface),an NM-1 group(nanomesh-1,electrochemical dealloying treatment in 1 mol/L NaOH 1 h on 2 V voltage),and an NM-2 group(nanomesh-2,electrochemical dealloying treatment in 5 mol/L NaOH 1 h on 2 V voltage).The surface morpholo-gies of the samples and the adhesion of HGFs on the sample surfaces were observed with scanning electron microscopy(SEM).The surface hydrophilicities of the samples were measured with a contact angle measuring instrument.The prolif-eration of HGFs on the different samples were evaluated with CCK-8,and the expression of adhesion-related genes,in-cluding collagen Ⅰ(COL1A1),collagen Ⅲ(COL3A1),fibronectin 1(FN1),focal adhesion kinase(FAK),vinculin(VCL),integrin α2(ITGA2),and integrin β1(ITGB1),on the different samples was measured with qRT-PCR.The ex-pression of vinculin on the surfaces of HGFs was observed via confocal laser scanning microscopy(CLSM)after immuno-fluorescent staining.Collagen fiber secretion and syntheses of HGFs from different samples were evaluated via Sirius red staining.Results SEM revealed the formation of ordered and uniform three-dimensional mesh structures on the surfaces of the NM-1 and NM-2 groups,with grid diameters of approximately 30 nm for the NM-1 group and approxi-mately 150 nm for the NM-2 group.Compared with that of the NC group,the water contact angles of the NM-1 group and NM-2 groups were significantly lower(P＜0.000 1).Cell proliferation in the NM-1 group was significantly greater than that in the NC group(P＜0.01).Moreover,there was no significant difference in the water contact angles or cell prolifer-ation between the NM-1 group and the NM-2 group.SEM revealed that HGFs were adhered well to the surfaces of all samples,while the HGFs in the NM-1 and NM-2 groups showed more extended areas,longer morphologies,and more de-veloped pseudopodia than did those in the NC group after 24 h.qRT-PCR revealed that the expression levels of the ad-hesion-related genes COL1A1,COL3A1,FN1,FAK and VCL in the NM-1 group were significantly greater than those in the NC and NM-2 groups(P＜0.01).The expression of vinculin protein in the NM-1 group was the highest,and the num-ber of focal adhesions was greatest in the NM-1 group(P＜0.01).The results of Sirius red staining showed that the NM-1 group had the highest secretion and syntheses of collagen fibers(P＜0.000 1).Conclusion The three-dimensional nanomechanical structure of Ti6Al4V modified by electrochemical dealloying promoted the adhesion,proliferation,colla-gen fiber secretion and syntheses of HGFs,and electrochemical dealloying of Ti6Al4V with a grid diameter of approxi-mately 30 nm obviously promoted HGF formation.

Objective To investigate the effects of electrochemically dealloying of Ti6Al4V abutments on human gingival fibroblasts(HGFs)and to provide experimental evidence for surface modification of implant abutments.Methods The samples were divided into an NC group(negative control,no other treatment on a smooth surface),an NM-1 group(nanomesh-1,electrochemical dealloying treatment in 1 mol/L NaOH 1 h on 2 V voltage),and an NM-2 group(nanomesh-2,electrochemical dealloying treatment in 5 mol/L NaOH 1 h on 2 V voltage).The surface morpholo-gies of the samples and the adhesion of HGFs on the sample surfaces were observed with scanning electron microscopy(SEM).The surface hydrophilicities of the samples were measured with a contact angle measuring instrument.The prolif-eration of HGFs on the different samples were evaluated with CCK-8,and the expression of adhesion-related genes,in-cluding collagen Ⅰ(COL1A1),collagen Ⅲ(COL3A1),fibronectin 1(FN1),focal adhesion kinase(FAK),vinculin(VCL),integrin α2(ITGA2),and integrin β1(ITGB1),on the different samples was measured with qRT-PCR.The ex-pression of vinculin on the surfaces of HGFs was observed via confocal laser scanning microscopy(CLSM)after immuno-fluorescent staining.Collagen fiber secretion and syntheses of HGFs from different samples were evaluated via Sirius red staining.Results SEM revealed the formation of ordered and uniform three-dimensional mesh structures on the surfaces of the NM-1 and NM-2 groups,with grid diameters of approximately 30 nm for the NM-1 group and approxi-mately 150 nm for the NM-2 group.Compared with that of the NC group,the water contact angles of the NM-1 group and NM-2 groups were significantly lower(P＜0.000 1).Cell proliferation in the NM-1 group was significantly greater than that in the NC group(P＜0.01).Moreover,there was no significant difference in the water contact angles or cell prolifer-ation between the NM-1 group and the NM-2 group.SEM revealed that HGFs were adhered well to the surfaces of all samples,while the HGFs in the NM-1 and NM-2 groups showed more extended areas,longer morphologies,and more de-veloped pseudopodia than did those in the NC group after 24 h.qRT-PCR revealed that the expression levels of the ad-hesion-related genes COL1A1,COL3A1,FN1,FAK and VCL in the NM-1 group were significantly greater than those in the NC and NM-2 groups(P＜0.01).The expression of vinculin protein in the NM-1 group was the highest,and the num-ber of focal adhesions was greatest in the NM-1 group(P＜0.01).The results of Sirius red staining showed that the NM-1 group had the highest secretion and syntheses of collagen fibers(P＜0.000 1).Conclusion The three-dimensional nanomechanical structure of Ti6Al4V modified by electrochemical dealloying promoted the adhesion,proliferation,colla-gen fiber secretion and syntheses of HGFs,and electrochemical dealloying of Ti6Al4V with a grid diameter of approxi-mately 30 nm obviously promoted HGF formation.

Objective To investigate the effects of electrochemically dealloying of Ti6Al4V abutments on human gingival fibroblasts(HGFs)and to provide experimental evidence for surface modification of implant abutments.Methods The samples were divided into an NC group(negative control,no other treatment on a smooth surface),an NM-1 group(nanomesh-1,electrochemical dealloying treatment in 1 mol/L NaOH 1 h on 2 V voltage),and an NM-2 group(nanomesh-2,electrochemical dealloying treatment in 5 mol/L NaOH 1 h on 2 V voltage).The surface morpholo-gies of the samples and the adhesion of HGFs on the sample surfaces were observed with scanning electron microscopy(SEM).The surface hydrophilicities of the samples were measured with a contact angle measuring instrument.The prolif-eration of HGFs on the different samples were evaluated with CCK-8,and the expression of adhesion-related genes,in-cluding collagen Ⅰ(COL1A1),collagen Ⅲ(COL3A1),fibronectin 1(FN1),focal adhesion kinase(FAK),vinculin(VCL),integrin α2(ITGA2),and integrin β1(ITGB1),on the different samples was measured with qRT-PCR.The ex-pression of vinculin on the surfaces of HGFs was observed via confocal laser scanning microscopy(CLSM)after immuno-fluorescent staining.Collagen fiber secretion and syntheses of HGFs from different samples were evaluated via Sirius red staining.Results SEM revealed the formation of ordered and uniform three-dimensional mesh structures on the surfaces of the NM-1 and NM-2 groups,with grid diameters of approximately 30 nm for the NM-1 group and approxi-mately 150 nm for the NM-2 group.Compared with that of the NC group,the water contact angles of the NM-1 group and NM-2 groups were significantly lower(P＜0.000 1).Cell proliferation in the NM-1 group was significantly greater than that in the NC group(P＜0.01).Moreover,there was no significant difference in the water contact angles or cell prolifer-ation between the NM-1 group and the NM-2 group.SEM revealed that HGFs were adhered well to the surfaces of all samples,while the HGFs in the NM-1 and NM-2 groups showed more extended areas,longer morphologies,and more de-veloped pseudopodia than did those in the NC group after 24 h.qRT-PCR revealed that the expression levels of the ad-hesion-related genes COL1A1,COL3A1,FN1,FAK and VCL in the NM-1 group were significantly greater than those in the NC and NM-2 groups(P＜0.01).The expression of vinculin protein in the NM-1 group was the highest,and the num-ber of focal adhesions was greatest in the NM-1 group(P＜0.01).The results of Sirius red staining showed that the NM-1 group had the highest secretion and syntheses of collagen fibers(P＜0.000 1).Conclusion The three-dimensional nanomechanical structure of Ti6Al4V modified by electrochemical dealloying promoted the adhesion,proliferation,colla-gen fiber secretion and syntheses of HGFs,and electrochemical dealloying of Ti6Al4V with a grid diameter of approxi-mately 30 nm obviously promoted HGF formation.

Objective To investigate the effects of electrochemically dealloying of Ti6Al4V abutments on human gingival fibroblasts(HGFs)and to provide experimental evidence for surface modification of implant abutments.Methods The samples were divided into an NC group(negative control,no other treatment on a smooth surface),an NM-1 group(nanomesh-1,electrochemical dealloying treatment in 1 mol/L NaOH 1 h on 2 V voltage),and an NM-2 group(nanomesh-2,electrochemical dealloying treatment in 5 mol/L NaOH 1 h on 2 V voltage).The surface morpholo-gies of the samples and the adhesion of HGFs on the sample surfaces were observed with scanning electron microscopy(SEM).The surface hydrophilicities of the samples were measured with a contact angle measuring instrument.The prolif-eration of HGFs on the different samples were evaluated with CCK-8,and the expression of adhesion-related genes,in-cluding collagen Ⅰ(COL1A1),collagen Ⅲ(COL3A1),fibronectin 1(FN1),focal adhesion kinase(FAK),vinculin(VCL),integrin α2(ITGA2),and integrin β1(ITGB1),on the different samples was measured with qRT-PCR.The ex-pression of vinculin on the surfaces of HGFs was observed via confocal laser scanning microscopy(CLSM)after immuno-fluorescent staining.Collagen fiber secretion and syntheses of HGFs from different samples were evaluated via Sirius red staining.Results SEM revealed the formation of ordered and uniform three-dimensional mesh structures on the surfaces of the NM-1 and NM-2 groups,with grid diameters of approximately 30 nm for the NM-1 group and approxi-mately 150 nm for the NM-2 group.Compared with that of the NC group,the water contact angles of the NM-1 group and NM-2 groups were significantly lower(P＜0.000 1).Cell proliferation in the NM-1 group was significantly greater than that in the NC group(P＜0.01).Moreover,there was no significant difference in the water contact angles or cell prolifer-ation between the NM-1 group and the NM-2 group.SEM revealed that HGFs were adhered well to the surfaces of all samples,while the HGFs in the NM-1 and NM-2 groups showed more extended areas,longer morphologies,and more de-veloped pseudopodia than did those in the NC group after 24 h.qRT-PCR revealed that the expression levels of the ad-hesion-related genes COL1A1,COL3A1,FN1,FAK and VCL in the NM-1 group were significantly greater than those in the NC and NM-2 groups(P＜0.01).The expression of vinculin protein in the NM-1 group was the highest,and the num-ber of focal adhesions was greatest in the NM-1 group(P＜0.01).The results of Sirius red staining showed that the NM-1 group had the highest secretion and syntheses of collagen fibers(P＜0.000 1).Conclusion The three-dimensional nanomechanical structure of Ti6Al4V modified by electrochemical dealloying promoted the adhesion,proliferation,colla-gen fiber secretion and syntheses of HGFs,and electrochemical dealloying of Ti6Al4V with a grid diameter of approxi-mately 30 nm obviously promoted HGF formation.

Objective To investigate the effects of electrochemically dealloying of Ti6Al4V abutments on human gingival fibroblasts(HGFs)and to provide experimental evidence for surface modification of implant abutments.Methods The samples were divided into an NC group(negative control,no other treatment on a smooth surface),an NM-1 group(nanomesh-1,electrochemical dealloying treatment in 1 mol/L NaOH 1 h on 2 V voltage),and an NM-2 group(nanomesh-2,electrochemical dealloying treatment in 5 mol/L NaOH 1 h on 2 V voltage).The surface morpholo-gies of the samples and the adhesion of HGFs on the sample surfaces were observed with scanning electron microscopy(SEM).The surface hydrophilicities of the samples were measured with a contact angle measuring instrument.The prolif-eration of HGFs on the different samples were evaluated with CCK-8,and the expression of adhesion-related genes,in-cluding collagen Ⅰ(COL1A1),collagen Ⅲ(COL3A1),fibronectin 1(FN1),focal adhesion kinase(FAK),vinculin(VCL),integrin α2(ITGA2),and integrin β1(ITGB1),on the different samples was measured with qRT-PCR.The ex-pression of vinculin on the surfaces of HGFs was observed via confocal laser scanning microscopy(CLSM)after immuno-fluorescent staining.Collagen fiber secretion and syntheses of HGFs from different samples were evaluated via Sirius red staining.Results SEM revealed the formation of ordered and uniform three-dimensional mesh structures on the surfaces of the NM-1 and NM-2 groups,with grid diameters of approximately 30 nm for the NM-1 group and approxi-mately 150 nm for the NM-2 group.Compared with that of the NC group,the water contact angles of the NM-1 group and NM-2 groups were significantly lower(P＜0.000 1).Cell proliferation in the NM-1 group was significantly greater than that in the NC group(P＜0.01).Moreover,there was no significant difference in the water contact angles or cell prolifer-ation between the NM-1 group and the NM-2 group.SEM revealed that HGFs were adhered well to the surfaces of all samples,while the HGFs in the NM-1 and NM-2 groups showed more extended areas,longer morphologies,and more de-veloped pseudopodia than did those in the NC group after 24 h.qRT-PCR revealed that the expression levels of the ad-hesion-related genes COL1A1,COL3A1,FN1,FAK and VCL in the NM-1 group were significantly greater than those in the NC and NM-2 groups(P＜0.01).The expression of vinculin protein in the NM-1 group was the highest,and the num-ber of focal adhesions was greatest in the NM-1 group(P＜0.01).The results of Sirius red staining showed that the NM-1 group had the highest secretion and syntheses of collagen fibers(P＜0.000 1).Conclusion The three-dimensional nanomechanical structure of Ti6Al4V modified by electrochemical dealloying promoted the adhesion,proliferation,colla-gen fiber secretion and syntheses of HGFs,and electrochemical dealloying of Ti6Al4V with a grid diameter of approxi-mately 30 nm obviously promoted HGF formation.

Objective To investigate the effects of electrochemically dealloying of Ti6Al4V abutments on human gingival fibroblasts(HGFs)and to provide experimental evidence for surface modification of implant abutments.Methods The samples were divided into an NC group(negative control,no other treatment on a smooth surface),an NM-1 group(nanomesh-1,electrochemical dealloying treatment in 1 mol/L NaOH 1 h on 2 V voltage),and an NM-2 group(nanomesh-2,electrochemical dealloying treatment in 5 mol/L NaOH 1 h on 2 V voltage).The surface morpholo-gies of the samples and the adhesion of HGFs on the sample surfaces were observed with scanning electron microscopy(SEM).The surface hydrophilicities of the samples were measured with a contact angle measuring instrument.The prolif-eration of HGFs on the different samples were evaluated with CCK-8,and the expression of adhesion-related genes,in-cluding collagen Ⅰ(COL1A1),collagen Ⅲ(COL3A1),fibronectin 1(FN1),focal adhesion kinase(FAK),vinculin(VCL),integrin α2(ITGA2),and integrin β1(ITGB1),on the different samples was measured with qRT-PCR.The ex-pression of vinculin on the surfaces of HGFs was observed via confocal laser scanning microscopy(CLSM)after immuno-fluorescent staining.Collagen fiber secretion and syntheses of HGFs from different samples were evaluated via Sirius red staining.Results SEM revealed the formation of ordered and uniform three-dimensional mesh structures on the surfaces of the NM-1 and NM-2 groups,with grid diameters of approximately 30 nm for the NM-1 group and approxi-mately 150 nm for the NM-2 group.Compared with that of the NC group,the water contact angles of the NM-1 group and NM-2 groups were significantly lower(P＜0.000 1).Cell proliferation in the NM-1 group was significantly greater than that in the NC group(P＜0.01).Moreover,there was no significant difference in the water contact angles or cell prolifer-ation between the NM-1 group and the NM-2 group.SEM revealed that HGFs were adhered well to the surfaces of all samples,while the HGFs in the NM-1 and NM-2 groups showed more extended areas,longer morphologies,and more de-veloped pseudopodia than did those in the NC group after 24 h.qRT-PCR revealed that the expression levels of the ad-hesion-related genes COL1A1,COL3A1,FN1,FAK and VCL in the NM-1 group were significantly greater than those in the NC and NM-2 groups(P＜0.01).The expression of vinculin protein in the NM-1 group was the highest,and the num-ber of focal adhesions was greatest in the NM-1 group(P＜0.01).The results of Sirius red staining showed that the NM-1 group had the highest secretion and syntheses of collagen fibers(P＜0.000 1).Conclusion The three-dimensional nanomechanical structure of Ti6Al4V modified by electrochemical dealloying promoted the adhesion,proliferation,colla-gen fiber secretion and syntheses of HGFs,and electrochemical dealloying of Ti6Al4V with a grid diameter of approxi-mately 30 nm obviously promoted HGF formation.

Objective To investigate the effects of electrochemically dealloying of Ti6Al4V abutments on human gingival fibroblasts(HGFs)and to provide experimental evidence for surface modification of implant abutments.Methods The samples were divided into an NC group(negative control,no other treatment on a smooth surface),an NM-1 group(nanomesh-1,electrochemical dealloying treatment in 1 mol/L NaOH 1 h on 2 V voltage),and an NM-2 group(nanomesh-2,electrochemical dealloying treatment in 5 mol/L NaOH 1 h on 2 V voltage).The surface morpholo-gies of the samples and the adhesion of HGFs on the sample surfaces were observed with scanning electron microscopy(SEM).The surface hydrophilicities of the samples were measured with a contact angle measuring instrument.The prolif-eration of HGFs on the different samples were evaluated with CCK-8,and the expression of adhesion-related genes,in-cluding collagen Ⅰ(COL1A1),collagen Ⅲ(COL3A1),fibronectin 1(FN1),focal adhesion kinase(FAK),vinculin(VCL),integrin α2(ITGA2),and integrin β1(ITGB1),on the different samples was measured with qRT-PCR.The ex-pression of vinculin on the surfaces of HGFs was observed via confocal laser scanning microscopy(CLSM)after immuno-fluorescent staining.Collagen fiber secretion and syntheses of HGFs from different samples were evaluated via Sirius red staining.Results SEM revealed the formation of ordered and uniform three-dimensional mesh structures on the surfaces of the NM-1 and NM-2 groups,with grid diameters of approximately 30 nm for the NM-1 group and approxi-mately 150 nm for the NM-2 group.Compared with that of the NC group,the water contact angles of the NM-1 group and NM-2 groups were significantly lower(P＜0.000 1).Cell proliferation in the NM-1 group was significantly greater than that in the NC group(P＜0.01).Moreover,there was no significant difference in the water contact angles or cell prolifer-ation between the NM-1 group and the NM-2 group.SEM revealed that HGFs were adhered well to the surfaces of all samples,while the HGFs in the NM-1 and NM-2 groups showed more extended areas,longer morphologies,and more de-veloped pseudopodia than did those in the NC group after 24 h.qRT-PCR revealed that the expression levels of the ad-hesion-related genes COL1A1,COL3A1,FN1,FAK and VCL in the NM-1 group were significantly greater than those in the NC and NM-2 groups(P＜0.01).The expression of vinculin protein in the NM-1 group was the highest,and the num-ber of focal adhesions was greatest in the NM-1 group(P＜0.01).The results of Sirius red staining showed that the NM-1 group had the highest secretion and syntheses of collagen fibers(P＜0.000 1).Conclusion The three-dimensional nanomechanical structure of Ti6Al4V modified by electrochemical dealloying promoted the adhesion,proliferation,colla-gen fiber secretion and syntheses of HGFs,and electrochemical dealloying of Ti6Al4V with a grid diameter of approxi-mately 30 nm obviously promoted HGF formation.

Objective To investigate the effects of electrochemically dealloying of Ti6Al4V abutments on human gingival fibroblasts(HGFs)and to provide experimental evidence for surface modification of implant abutments.Methods The samples were divided into an NC group(negative control,no other treatment on a smooth surface),an NM-1 group(nanomesh-1,electrochemical dealloying treatment in 1 mol/L NaOH 1 h on 2 V voltage),and an NM-2 group(nanomesh-2,electrochemical dealloying treatment in 5 mol/L NaOH 1 h on 2 V voltage).The surface morpholo-gies of the samples and the adhesion of HGFs on the sample surfaces were observed with scanning electron microscopy(SEM).The surface hydrophilicities of the samples were measured with a contact angle measuring instrument.The prolif-eration of HGFs on the different samples were evaluated with CCK-8,and the expression of adhesion-related genes,in-cluding collagen Ⅰ(COL1A1),collagen Ⅲ(COL3A1),fibronectin 1(FN1),focal adhesion kinase(FAK),vinculin(VCL),integrin α2(ITGA2),and integrin β1(ITGB1),on the different samples was measured with qRT-PCR.The ex-pression of vinculin on the surfaces of HGFs was observed via confocal laser scanning microscopy(CLSM)after immuno-fluorescent staining.Collagen fiber secretion and syntheses of HGFs from different samples were evaluated via Sirius red staining.Results SEM revealed the formation of ordered and uniform three-dimensional mesh structures on the surfaces of the NM-1 and NM-2 groups,with grid diameters of approximately 30 nm for the NM-1 group and approxi-mately 150 nm for the NM-2 group.Compared with that of the NC group,the water contact angles of the NM-1 group and NM-2 groups were significantly lower(P＜0.000 1).Cell proliferation in the NM-1 group was significantly greater than that in the NC group(P＜0.01).Moreover,there was no significant difference in the water contact angles or cell prolifer-ation between the NM-1 group and the NM-2 group.SEM revealed that HGFs were adhered well to the surfaces of all samples,while the HGFs in the NM-1 and NM-2 groups showed more extended areas,longer morphologies,and more de-veloped pseudopodia than did those in the NC group after 24 h.qRT-PCR revealed that the expression levels of the ad-hesion-related genes COL1A1,COL3A1,FN1,FAK and VCL in the NM-1 group were significantly greater than those in the NC and NM-2 groups(P＜0.01).The expression of vinculin protein in the NM-1 group was the highest,and the num-ber of focal adhesions was greatest in the NM-1 group(P＜0.01).The results of Sirius red staining showed that the NM-1 group had the highest secretion and syntheses of collagen fibers(P＜0.000 1).Conclusion The three-dimensional nanomechanical structure of Ti6Al4V modified by electrochemical dealloying promoted the adhesion,proliferation,colla-gen fiber secretion and syntheses of HGFs,and electrochemical dealloying of Ti6Al4V with a grid diameter of approxi-mately 30 nm obviously promoted HGF formation.

Objective To compare the efficacy of endoscopic bougie/balloon dilation(EBD),endoscopic radial incision(ERI),and ERI combined with esophageal stent placement(ESP)for the treatment of benign esophageal stenosis,and evaluate the feasibility and safety of ERI combined with ESP for the treatment of benign esophageal stenosis.Methods 48 Patients with benign esophageal stenosis from January 2019 to January 2023 were recruited,and divided into EBD group(n=24),ERI group(n=17)and ERI+ESP group(n=7).The differences in operating success,restenosis and complications among the three groups were compared.Results The number of previous endoscopic treatment in ERI+ESP group was more than that in EBD group and ERI group,and the differences were statistically significant(P＜0.05).Technical success was achieved in 23 cases and clinical remission in 23 cases in EBD group,technical success in 16 cases and clinical remission in 15 cases in ERI group,technical success in 7 cases and clinical remission in 7 cases in ERI+ESP group.There was no significant difference in technical success rate and clinical remission rate among the three groups(P＞0.05).After 3 months of follow-up,there were 15,9 and 1 cases of esophageal restenosis in the EBD group,ERI group and ERI+ESP group,respectively.There was no significant difference in the rate of esophageal restenosis among the 3 groups(P＞0.05).After 6 months of follow-up,there were 20 cases of esophageal restenosis in the EBD group,13 cases in the ERI group and 1 case in the ERI+ESP group.The rate of esophageal restenosis in the ERI+ESP group was significantly lower than that in the EBD group and the ERI group(P＜0.05).However,there was no statistically significant difference in the esophageal restenosis rate between the EBD group and the ERI group(P＞0.05).The time to the first postoperative restenosis was 74.00(48.75,159.00)days in the EBD group,84.00(54.50,195.00)days in the ERI group,and 250.00(206.00,289.00)days in the ERI+ESP group.The time to the first postoperative restenosis was longer in the ERI+ESP group than that in the EBD and ERI groups.The differences were statistically significant(P＜0.05),but there was no significant difference in restenosis time between EBD group and ERI group(P＞0.05).There were 5,5 and 3 cases of complications in the EBD group,ERI group and ERI+ESP group,respectively,and there was no significant difference in the incidence of complications among the three groups(P＞0.05).Conclusion ERI+ESP is comparable to EBD and ERI in terms of technical success and short-term clinical remission rate for the treatment of benign esophageal stenosis,and is superior to EBD and ERI in terms of long-term restenosis rate and restenosis time,with no influence on the occurrence of complications.