caa a22 4500 477095534 CHVBK 20180405111526.0 cr unu---uuuuu 170330e19960501xx s 000 0 eng 10.1007/BF00185880 doi (NATIONALLICENCE)springer-10.1007/BF00185880 Cellular cementogenesis in rat molars: the role of cementoblasts in the deposition of intrinsic matrix fibers of cementum proper [Elektronische Daten] [Tsuneyuki Yamamoto, Takanori Domon, Shigeru Takahashi, Minoru Wakita] The formation of intrinsic fibers was examined in the advanced stage of rat cellular cementogenesis by light and electron microscopy. Using scanning electron microscopy, cementoblasts showed wing-like processes, partly encircling principal fibers. At the cementum-facing side of the cells these processes showed segmentation into finger-like processes, arranged in parallel with the cementum surface. Transmission electron microscopy showed many cytoplasmic fragments around intrinsic fibers at the cementum surface. These fragments contained microtubules and collagenous secretory granules that were arranged in parallel with the cementum surface and the intrinsic fibers. The wing-like processes contained microtubules and secretory granules that were arranged perpendicularly to the cementum surface and in parallel with the principal fibers. These observations suggest that: (1) the cytoplasmic fragments are cross-sectioned finger-like processes; (2) cementoblasts secrete intrinsic fibers from the finger-like processes and additional principal fibers from the wing-like processes; (3) cementoblasts constantly shorten their wing-like processes by forming finger-like processes. This development starts at the side facing the cementum and proceeds towards the periodontal ligament. With the segmentation, the cementoblasts change the arrangement of secretory granules to secrete intrinsic fibers around preformed principal fibers. Springer-Verlag, 1996 Cementoblast nationallicence Extrinsic fiber nationallicence Intrinsic fiber nationallicence Periodontal ligament nationallicence Rat molar nationallicence Yamamoto Tsuneyuki Department of Oral Anatomy II, School of Dentistry, Hokkaido University, Kita 13, Nishi 7, Kita-ku, 060, Sapporo, Japan aut Domon Takanori Department of Oral Anatomy II, School of Dentistry, Hokkaido University, Kita 13, Nishi 7, Kita-ku, 060, Sapporo, Japan aut Takahashi Shigeru Department of Oral Anatomy II, School of Dentistry, Hokkaido University, Kita 13, Nishi 7, Kita-ku, 060, Sapporo, Japan aut Wakita Minoru Department of Oral Anatomy II, School of Dentistry, Hokkaido University, Kita 13, Nishi 7, Kita-ku, 060, Sapporo, Japan aut Anatomy and Embryology Springer-Verlag 193/5(1996-05-01), 495-500 0340-2061 193:5<495 1996 193 429 https://doi.org/10.1007/BF00185880 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00185880 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yamamoto Tsuneyuki Department of Oral Anatomy II, School of Dentistry, Hokkaido University, Kita 13, Nishi 7, Kita-ku, 060, Sapporo, Japan aut NATIONALLICENCE 700 1- Domon Takanori Department of Oral Anatomy II, School of Dentistry, Hokkaido University, Kita 13, Nishi 7, Kita-ku, 060, Sapporo, Japan aut NATIONALLICENCE 700 1- Takahashi Shigeru Department of Oral Anatomy II, School of Dentistry, Hokkaido University, Kita 13, Nishi 7, Kita-ku, 060, Sapporo, Japan aut NATIONALLICENCE 700 1- Wakita Minoru Department of Oral Anatomy II, School of Dentistry, Hokkaido University, Kita 13, Nishi 7, Kita-ku, 060, Sapporo, Japan aut NATIONALLICENCE 773 0- Anatomy and Embryology Springer-Verlag 193/5(1996-05-01), 495-500 0340-2061 193:5<495 1996 193 429 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer