What is lamina dura radiograph?
What is lamina dura radiograph?
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.
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 radiopaque or radiolucent?
Radio-graphically, the lamina dura seen as a thin radiopaque line bound the normal tooth socket. The side adjacent to the roots is the periodontal membrane which is seen as a thin radiolucent shadow on the radiograph. The op- posite side and below the lamina dura is the cancellous bone [1,2].
What does loss of lamina dura indicate?
Absence of all or nearly all, lamina dura shadows is usually evidence of general decalcification of the skeleton. With few exceptions, lack of continuity of the Lamina dura indicates abnormality or the infection of the bone. Every small discontinuity has significance.
What type of bone is lamina dura?
Alveolar bone can be divided into two main parts: a thin layer of compact (radiodense) bone (the ‘cortex’ of alveolus) that lines the alveolus proper, in which Sharpey’s fibers insert, that is radiographically termed the lamina dura (lamina dura denta).
Why is alveolar bone called lamina dura?
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. It is the lamina dura which is attached to the cementum from the roots by the periodontal ligament. It is uniformly lighter.
Why is lamina dura thickening?
… tissue dynamic in occlusal trauma allows one to observe radiographically the thickening of the lamina dura (Figs 2 to 5), by increasing cortical bone deposition in the alveolar bone, and enhancing the resilience of this structure and stretching the collagen fibers.
Which term is also used to refer to the lamina dura?
Medical Definition of lamina dura : 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.
Is the lamina dura the alveolar bone?