What is the dental lamina?
Medical Definition of dental lamina : a linear zone of epithelial cells of the covering of each embryonic jaw that grows down into the developing gums and gives rise to the enamel organs of the teeth. — called also dental ridge.
What does loss of lamina dura mean?
Absence of the lamina dura was defined as no detection of a white line below the crown (Figures 2 and 3). The degree of bone resorption at the mesial surface of the canine and the first molar was assessed for aging or periodontal disease.
Is lamina dura the same as bundle bone?
The alveolar process includes a region of compact bone that is adjacent to the periodontal ligament (PDL). This is called the lamina dura when it is viewed on radiographs. The alveolar bone proper is also called the bundle bone because of the Sharpey fibers.
What is the lamina dura?
Lamina dura (LD) is a radiographic landmark viewed largely on periapical radiographs (PR). The terminology LD (or alveolus) is applied to the thin layer of dense cortical bone, which lines the roots of sound teeth. Presence of LD is an indication of the health of the teeth.
What does dental lamina gives rise to?
The dental lamina continues to grow backwards, giving rise to further enamel organs for the second deciduous molar (10-week embryo), and the permanent molars (first permanent molar at 16-week embryo; second and third permanent molars after birth).
Is lamina dura Cribriform plate?
The lamina dura is produced by the periodontal ligament; it forms the hard lining of the tooth socket, and is a cribriform plate of bundle bone in which fibers of the periodontal ligament are em- bedded.
How would you describe lamina dura?
Lamina dura is compact bone that lies adjacent to the periodontal ligament, in the tooth socket. The lamina dura surrounds the tooth socket and provides the attachment surface with which the Sharpey’s fibers of the periodontal ligament perforate.
Is lamina dura cribriform plate?
Why is lamina dura radiopaque?
The lamina dura surrounds the tooth socket and provides the attachment surface with which the Sharpey’s fibers of the periodontal ligament perforate. On an x-ray a lamina dura will appear as a radiopaque line surrounding the tooth root. An intact lamina dura is seen as a sign of healthy periodontium.
What does lamina dura stand for in medical terms?
lamina du·ra | \\-ˈd(y)u̇r-ə \\. : the thin hard layer of bone that lines the socket of a tooth and that appears as a dense white line in radiography. — called also cribriform plate.
Which is the best description of a lamina?
1. a thin, flat plate or stratum of a composite structure; called also layer. 2. vertebral lamina. basal lamina ( lamina basa´lis) the layer of the basement membrane lying next to the basal surface of the adjoining cell layer composed of an electron-dense lamina densa and an electron-lucent lamina lucida.
Is there a relationship between periodontitis and radiographic crestal lamina dura?
The relationship between radiographic crestal lamina dura and periodontitis disease-activity was studied longitudinally in 51 treated adult patients on a systematic 3-month maintenance program.
Why are lamina dura Shadows different in different teeth?
Wide variations in the thickness of the lamina dura are seen not only around different teeth in the same mouth but in a single tooth. This variation in width and density of the lamina dura shadow are the result of differences in the shape and contour of the roots or root.