When is lamina dura lost?
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.
What causes loss of lamina dura?
The lamina dura is affected not only by odontogenic infections but also systemic diseases such as hyperparathyroidism,1,3 renal osteodystrophy,1,4 hypophosphatasia,1 and hypophosphatemia,1 thus, the lamina dura could be valuable for diagnosis.
What does the lamina dura in the radiograph represent?
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 causes thickening of lamina dura?
14, 15 Destruction of periodontal fibers occurs in the injury stage of trauma from occlusion and a widening of periodontal ligament occurs in the final stage, which also leads to increased tooth mobility. Increasing the width of the periodontal space, often accompanied with a thickening of the lamina dura. …
Why is lamina dura more radiopaque?
The appearance of the lamina dura on radiographs may vary. When the x-ray beam is directed through a relatively long expanse of the structure, the lamina dura appears radiopaque and well defined. When the beam is directed more obliquely, the lamina dura appears more diffuse and may not be discernible.
Does periodontal ligament grow back?
The periodontal ligament does not regenerate easily in any areas where it was lost and is prone to periodontal inflammation. Should a patient’s advanced gum disease have damaged the jawbone, placing a bone graft may be unsuccessful if the periodontal ligament is not also simultaneously restored.
What is the function of 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.
What is the lamina dura made of?
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.
Why is alveolar bone called as 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. The alveolar bone proper is also called the bundle bone because of the Sharpey fibers. A portion of the fibers of the PDL are inserted here.
Which cells lay down the alveolar bone?
Two major types of cells participate in the process—osteoblasts and osteoclasts. Osteoblasts in the alveolar bone originate directly from the dental mesenchyme (intramembranous ossification).
What is lamina dura (LD)?
Go to: Introduction 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.
Is crestal lamina dura present at 1809 interproximal sites?
The presence or absence of crestal lamina dura at 1809 interproximal sites was scored from periapical and bitewing radiographs taken at baseline of a 36-month maintenance care period.
Is radiographic crestal lamina dura associated with periodontitis disease-activity?
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.
What does LD mean on a periapical radiograph?
Introduction 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.