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In this study, we attempted to construct a carbon nanotube\/chitosan\/sodium alginate (CNT\/CS\/AL) ternary composite hydrogel and then prepare porous scaffold by 3D printing technology. Subsequently, characterizing the materials and testing the mechanical properties of the scaffold. Additionally, its effect on the proliferation of human periodontal ligament cells (hPDLCs) and its antibacterial effect on <jats:italic>Porphyromonas gingivalis<\/jats:italic> were detected. We found that CNT\/CS\/AL porous composite scaffolds with uniform pores could be successfully prepared. Moreover, with increasing CNT concentration, the degradation rate and the swelling degree of scaffold showed a downward trend. The compressive strength test indicated the elastic modulus of composite scaffolds ranged from 18 to 80\u2009kPa, and 1% CNT\/CS\/AL group had the highest quantitative value. Subsequently, cell experiments showed that the CNT\/CS\/AL scaffold had good biocompatibility and could promote the proliferation of hPDLCs. Among 0.1%\u20131% CNT\/CS\/AL groups, the biocompatibility of 0.5% CNT\/CS\/AL scaffold performed best. Meanwhile, in vitro antibacterial experiments showed that the CNT\/CS\/AL scaffold had a certain bacteriostatic effect on <jats:italic>P. gingivalis<\/jats:italic>. When the concentration of CNT was more than 0.5%, the antimicrobial activity of composite scaffold was significantly promoted, and about 30% bacteria were inactivated. In conclusion, this 3D\u2010printed CNT\/CS\/AL composite scaffold, with good material properties, biocompatibility and bacteriostatic activity, may be used for periodontal tissue regeneration, providing a new avenue for the treatment of periodontal disease.<\/jats:p>","DOI":"10.1002\/jbm.b.35133","type":"journal-article","created":{"date-parts":[[2022,7,16]],"date-time":"2022-07-16T12:05:00Z","timestamp":1657973100000},"page":"73-84","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":41,"title":["The improvement of periodontal tissue regeneration using a <scp>3D<\/scp>\u2010printed carbon nanotube\/chitosan\/sodium alginate composite scaffold"],"prefix":"10.1002","volume":"111","author":[{"given":"Lai","family":"Suo","sequence":"first","affiliation":[{"name":"Department of International VIP Dental Clinic, Tianjin Stomatological Hospital, School of Medicine Nankai University  Tianjin 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