What part of alveolar bone is lamina dura?

On the mandible, it is a ridge located on the superior surface. It comprises of the thickest part of the maxillae. 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.

What is lamina dura of teeth?

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?

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.

What are the three layers of alveolar bone?

Alveolar bone consists of four layers. In addition to the three layers found in all bones, namely periosteum, dense compact bone and cancellous bone, there is a fourth layer called the cribriform plate, which lines the alveolar sockets.

What bacteria is commonly associated with aggressive periodontitis?

Aggressive periodontitis in young people, once known as juvenile periodontitis, affects less than 1% of the population. This disease process is now associated with a specific pathogen, Aggregatibacter actinomycetemcomitans (formerly Actinobacillus).

What causes lamina dura loss?

It is usually considered that the loss of the lamina dura is pathognomonic of hyperparathyroidism although some degree of loss may be apparent in osteomalacia and in Paget’s disease.

In which condition lamina dura is congenitally absent?

The absence or diminution of lamina dura is diagnostic of many local & systemic conditions like hyperparathyroidism, renal osteodystrophy, etc.

When is lamina dura lost?

What causes thickening of lamina dura?

Bone changes may take the appearance of thickening of the lamina dura, widening of the periodontal ligament, focal sclerosis, cortical erosion and radiolucent areas (Table. 1), but these are nonspecific and can occur because of ‘everyday’ dental disease and even normal anatomical variation in bone pattern.

What does lamina dura stand for in dental terms?

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.

Which is more opaque the alveolar bone or the lamina dura?

In the mandible, incisive bone, and rostral maxilla, the lamina dura is more opaque than the surrounding trabecular bone often term the alveolar bone. The caudal maxillary cheek teeth have reserve crown and roots that reside within the rostral and caudal maxillary sinuses.

What kind of bone is outside the lamina dura?

Computed Tomography. Outside the lamina dura is the alveolar bone, which is then surrounded by the trabecular bone of incisive bone, mandible, and maxilla. The bone will respond to both pathologic and physiologic processes with sclerosis and periosteal proliferation.

Which is a symptom of advancing lamina dura?

The first demonstrable sign of advancing infection is loss of the sharp angle at the junction of the alveolar crest and lamina dura as a result of resorption of the crest. The alveolar crest becomes less distinct, or less sharp, because it has become eroded.