Figure 10

TEM observations of the structural formation of JE cells attachment to the cementum surface. A. At 3 d, there was a small number of cells on cementum surface, cells were spherical, did not stretch (TEM × 13500); B. At 5 d, cells on cementum surface increased in number, and a portion of cells stretched (TEM × 9700); C. At 7 d, cells fully stretched to be flat-shaped, and attached to the cementum surface, but did not form clear basement membrane-like and hemidesmosome-like structures (TEM × 24500); D. At 9 d, JE cells appeared to have a small number of electron-dense deposits like hemidesmosome at the local cell membrane attached to cementum surface (arrows, TEM × 33000); E. At 11—14 d, there was a significantly increase in cell number on cementum surface, and multi-layer cells appeared (TEM × 7400). F. a large number of electron-dense deposits (arrows) appeared at JE cell membrane—cementum surface junction, forming the basement membrane-like and hemidesmosome-like structures (TEM × 46000).