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The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
WikiVisually
The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
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Crown-to-root ratio
Videos
Crown-to-root-ratio is the ratio of the length of the part of a tooth that appears above the alveolar bone versus what lies below it. It is an important consideration in the diagnosis, treatment plann
This X-ray film reveals a poor crown-to-root ratio for tooth #21 (right), the lower left first premolar. The tooth exhibits 50% bone loss, adding roughly 5-7 mm to the clinical crown of what is actually anatomical root. The fulcrum, existing somewhere immediately apical to the height of the bone, does not allow for any adjacent bone to avoid compression or tension, resulting in virtually complete widening of the PDL and a grim prognosis, due to
This X-ray film reveals a poor crown-to-root ratio for tooth #21 (right), the lower left first premolar. The tooth exhibits 50% bone loss, adding roug
This X-ray film displays horizontal bone loss of the mandible, in the lower right quadrant. Although the two premolars and the molar exhibit moderate
This X-ray film displays horizontal bone loss of the mandible, in the lower right quadrant. Although the two premolars and the molar exhibit moderate to severe bone loss, there was no tooth mobility at the time this film was taken.
Models of human teeth as they exist within the alveolar bone. The roots, as they can be seen through the transparent "bone", exist naturally in greate
Models of human teeth as they exist within the alveolar bone. The roots, as they can be seen through the transparent "bone", exist naturally in greater inciso-apical lengths than the crowns.
Alveolar process
Videos
The alveolar process is the portion of bone containing the tooth sockets on the jaw bones. The alveolar process is covered by gums within the mouth, terminating roughly along the line of the mandibula
Crown-to-root ratio
…Crown-to-root-ratio is the ratio of the length of the part of a tooth that appears above the alveolar bone versus what lies below it. It is an important consideration in the diagnosis, treatment planning and restoration of teeth, one that hopefully guides…
Alveolar region of the maxilla (white) and mandible (orange) cut away to the right
Alveolar region of the maxilla (white) and mandible (orange) cut away to the right
German illustration (c. 1910) depicting interior of jawbones, with nerves, veins, and arteries leading to teeth—and thus the alveolar area
German illustration (c. 1910) depicting interior of jawbones, with nerves, veins, and arteries leading to teeth—and thus the alveolar area
X-ray showing alveolar defect causing cleft lip and cleft palate
X-ray showing alveolar defect causing cleft lip and cleft palate