Bone model 0106-00

mandiblemandibularjaw

The lower jaw of an eleven year old depicts deciduous teeth being replaced by permanent teeth. Unbreakable plastic, the model has been scaled to 3-1/2 times life size to enhance difficult to observe details. The outer portion of the jaw bone has been cut away exposing the roots of the teeth, their nerves and blood vessels. Four teeth can be extracted from the jaw: an incisor, a premolar, molar, and a developing canine. One molar has caries. Another is sectioned longitudinally revealing its enamel, dentine, cementum, and pulp. Thirty-one hand numbered structures are identified in the accompanying key. The Teeth (Teeth shown would be for a 10-12 yr. old. Development and eruption ages vary greatly between individuals.) (Left side of mandible shown on model) Condylar process Mandibular notch Masseteric tuberosity Angle of the mandible Coronoid process Alveolar process The oblique line Mental foramen Head of mandible Arteries, Veins, and Nerves Inferior alveolar nerve Inferior alveolar vein Inferior alveolar artery Mental nerve Mental artery Tooth Structure (See bisected tooth #29, the first molar) 15. Enamel 16. Dentine 17. Cementum 18. Pulp, containing blood & nerve supply (See removable tooth #26, the first premolar) 19. Root area 20. Neck area 21. Crown area (Includes chewing surfaces) 22. Central incisor, permanent (Erupts about age 6) 23. Lateral incisor, permanent (Erupts about age 8) 24. Canine, deciduous 25. Canine, permanent (Unerupted. Will erupt about age 11) 26. First premolar, permanent (Replaced the first primary “baby” molar about age 9) 27. Second primary “baby” molar, deciduous