What is dehiscence in dentistry?
Dehiscence and Fenestration (Fig. 18-8) A dehiscence is loss of alveolar bone on the facial (rarely lingual) aspect of a tooth that leaves a characteristic oval, root-exposed defect from the cementoenamel junction apically. The defect may be one or two millimeters long or extend the full length of the root.
What causes fenestration and dehiscence?
The causes for Fenestration and Dehiscence is not known and the etiology is usually mentioned as unknown. Both Fenestration and Dehiscence cannot be identified clinically or radiographically and are only seen during surgery or by probing in case of dehiscence.
What does fenestration mean in dentistry?
Fenestration is an isolated area in which the tooth root is denuded of bone and the root surface is covered only by periosteum and overlying gingiva. Mucosal fenestration is a clinical entity in which the overlying gingiva or mucosa is also denuded thus the root is exposed to the oral cavity.
What is the alveolar process?
The alveolar process is the horizontal portion of the maxilla that holds the tooth roots. b. Alveoli for the tooth roots are present all along the alveolar process, except where these have been resorbed following the loss of teeth.
What is the alveolar crest?
The alveolar crest is the most cervical rim found in the alveolar bone proper. When it is healthy, the alveolar crest is slightly apical to the cementoenamel junction (CEJ) by about 1.5-2 mm. The alveolar crests of the adjacent teeth are also uniform in height along the jaw when they are healthy.
What causes dehiscence dental?
A predisposing factor for the cause of dehiscence is an unfavorable frenum pull, prominent root contours, malpositioning of teeth, labial protrusion of root, thin bony plates and long standing trauma. Methods to reconstruct the destroyed alveolar bone include osteoconduction, osteoinduction and GBR.
Where is the gingiva?
oral cavity
The gingiva (gums) are found in the oral cavity of humans surrounding part of their teeth. They are comprised of mucosal tissue which covers the alveolar processes of the mandible and maxilla and finish at each tooth’s neck.
What is the difference between alveoli and alveolus?
They get together and form a large surface area around 70m2 in both lungs necessary for efficient gas exchange. The structure and arrangement is described above. What is the difference between Alveoli and Alveolus? The only difference between alveoli and alveolus is that alveolus is the singular word of alveoli.
What forms alveolar bone?
The alveolar bone It is the part of the maxillary bones (upper jaw and mandible) that forms and supports the dental alveoli. Forming part of the insertion periodontium, together with the cementum and the periodontal ligament.
What is lamellar bone?
(lə-mĕl′ər) n. A bone in which the tubular lamellae are formed, which are characterized by parallel spirally arranged collagen fibers.
What is the bone between teeth called?
The portion of alveolar bone between two adjacent teeth is known as the interdental septum (or interdental bone). The connected, supporting area of the jaw (delineated by the apexes of the roots of the teeth) is known as the basal bone.