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.
What is the significance of lamina dura?
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 causes widening of lamina dura?
For instance, orthodontic movement of teeth results in PDL widening, but the lamina dura remains intact. In contrast, malignant or locally aggressive lesions can quickly grow downwards into the ligament space, resulting in an irregular widening and destruction of the lamina dura.
What is the lamina dura of a tooth?
The lamina dura is the hard bony lining of the alveolus (Fig. 1), or socket, of a tooth, and to- gether with the periodontal ligament and the cementum which coats the tooth root it forms the attachment apparatus of the tooth.
What is alveolar bone proper?
The alveolar bone, also called the alveolar process, is the part of the jaw that holds the teeth. However, the alveolar bone proper is the area of bone that comes directly into contact with the root of a tooth, or the lining of the socket. The alveolar bone proper is hard, compact bone and not soft, spongy bone.
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 PDL widening?
PDL widening, thickening of the lamina dura, increased number and size of trabeculae and bone loss are radiographic features. Continuous force causes tooth movement that is marked initially by PDL narrowing. In the secondary period of tooth movement, the PDL is considerably widened.
How do you treat widened PDL?
Treatment options include: i) sectioning and removal of the distal cantilever, ii) dental implants, or iii) reevaluate over time with the patient informed to reduce function in this area. Occlusal Trauma. Note widening of the periodontal ligament space – PDL space- in the xray.
What causes widened periodontal ligament?
PDL widening occurs in trauma from occlusion, but in association with angular bone defects and mobility of teeth. However, in scleroderma, involved teeth are often not mobile and their gingival attachments are usually intact.
Is the lamina dura the alveolar 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.
Is periodontal ligament radiolucent?
Periodontal ligaments are structures holding teeth in their sockets. They are seen as a thin radiolucent space between the surface of the tooth root and the lamina dura, the lining of the tooth socket.
What do you need to know about lamina dura?
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.
How long does a crestal lamina dura last?
In contrast, no sites exhibiting an intact baseline crestal lamina dura demonstrated periodontitis recurrence up to 24 months from baseline (100% positive predictive values).
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.
How is lamina dura demarcated in CBCT image?
The lamina dura can be demarcated around a recent extraction socket. Coronal image showing socket with 12 and sagittal image showing socket with 38. Lamina dura is demarcated around the alveolar socket. CBCT is considered better than IOPA/ Periapical radiographs and Panoramic radiographs for detection of lamina dura and PDL space.