title: In situ tissue engineering of periodontal tissues by seeding with periodontal ligament-derived cells.
abstract: The feasibility of an in situ tissue-engineering method employing cell-based therapy with autologous periodontal ligament-derived cells was investigated. Periodontal ligament cells were obtained from six beagle dogs. Periodontal fenestration defects (6 x 4 mm) were created bilaterally at a location 6 mm apical to the marginal alveolar crest in the maxillary canines. Alkaline phosphatase-positive periodontal ligament cells (3 x 10(5) cells) were seeded onto a collagen sponge scaffold just before implantation. One defect was filled with the cell-scaffold construct, and another was left empty as the control. All animals were killed 4 weeks after surgery, and specimens were evaluated histomorphometrically. All the histomorphometrical data were analyzed by three-way analysis of variance with the Bonferroni multiple comparisons test. Regeneration of apical tissue was faster than that of coronal and isolated tissues on the control side (apical > coronal > isolated; p < 0.0001). On the other hand, on the cell-seeded side, regeneration of the cementum was observed uniformly on the root surface. Our data suggest that the seeded cells induced cementum regeneration on the root surface, indicating the potential of in situ tissue engineering using autologous cells for the regeneration of periodontal tissues.
authors.affiliation: Section of Molecular Craniofacial Embryology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan. nakahara@fronteir.kyoto-u.ac.jp
authors.forename: Taka
authors.initials: T
authors.lastname: Nakahara
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Nakamura
authors.forename: Eizaburo
authors.initials: E
authors.lastname: Kobayashi
authors.forename: Koh-Ichi
authors.initials: K
authors.lastname: Kuremoto
authors.forename: Tomonori
authors.initials: T
authors.lastname: Matsuno
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Tabata
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Eto
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Shimizu
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D000704:Analysis of Variance; D000818:Animals; D001861:Bone Regeneration / Q000502:physiology; D003094:Collagen; D004285:Dogs; D005260:Female; D005994:Glycerophosphates / Q000378:metabolism; D010513:Periodontal Ligament; D023822:Tissue Engineering
chemical_list: D005994:Glycerophosphates; D003094:Collagen; D000469:Alkaline Phosphatase; C031463:beta-glycerophosphoric acid