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Cementoblasts form the cementum of a tooth. Osteoblasts give rise to the alveolar bone around the roots of teeth. Fibroblasts develop the periodontal ligaments which connect teeth to the alveolar bone through cementum. [4] Tooth development is commonly divided into the following stages: the bud stage, the cap, the bell, and finally maturation.
Coelacanth caught in 1974 Bony fish split their jaws into several bones and evolve lungs, fin bones, two pairs of rib bones, and opercular bones, and diverge into the actinopterygii (with ray fins) and the sarcopterygii (with fleshy, lower fins); [17] the latter transitioned from marine to freshwater habitats. Jawed fish also possess dorsal and ...
This is a list of films produced by and released under the Walt Disney Pictures banner (known as that since 1983, with Never Cry Wolf as its first release) and films released before that under the former name of the parent company, Walt Disney Productions (1929–1983).
As the incisors grind against each other, the softer dentine on the rear of the teeth wears away, leaving the sharp enamel edge shaped like the blade of a chisel. [4] Most species have up to 22 teeth with no canines or anterior premolars. A gap, or diastema, occurs between the incisors and the cheek teeth in most species. This allows rodents to ...
of or relating to bone marrow or the spinal cord: Greek μυελός (muelós), marrow, bone-marrow myelin sheath, myeloblast: myl(o)-of or relating to molar teeth or the lower jaw Greek μῠ́λη (múlē, mill, grind, molars mylohyoid nerve: myri-ten thousand Greek μῡρῐ́ος (mūríos), innumerable, countless, infinite myriad: myring ...
Dental plaque is a biofilm that attaches to tooth surfaces, restorations and prosthetic appliances (including dentures and bridges) if left undisturbed.Understanding the formation, composition and characteristics of plaque helps in its control. [5]