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A syndesmosis (“fastened with a band”) is a type of fibrous joint in which two parallel bones are united to each other by fibrous connective tissue. The gap between the bones may be narrow, with the bones joined by ligaments , or the gap may be wide and filled in by a broad sheet of connective tissue called an interosseous membrane . [ 1 ]
Using the periodontal six/four point chart, if more than 30% of sites are involved then a diagnosis of generalised disease is given. If less than 30% of sites are involved, then the type of periodontitis is localized. To complete the diagnosis, the extent of the disease must be assessed.
Rather than a single disease entity, periodontal disease is a combination of multiple disease processes that share a common clinical manifestation. The cause includes both local and systemic factors. The disease consists of a chronic inflammation associated with loss of alveolar bone. Advanced disease features include pus and exudates.
The PDL also undergoes drastic changes with chronic periodontal disease that involves the deeper structures of the periodontium with periodontitis. The fibers of the PDL become disorganized, and their attachments to either the alveolar bone proper or cementum through Sharpey fibers are lost because of the resorption of these two hard dental tissue.
Some languages contrast laminal denti-alveolar and apical alveolar nasals. For example, in the Malayalam pronunciation of Nārāyanan, the first n is dental, the second is retroflex, and the third alveolar. A postalveolar nasal occurs in a number of Australian Aboriginal languages, including Djeebbana and Jingulu. [1]
The articulating surfaces of synarthroses have little or no mobility, and are strongly united to each other. For example, most of the joints of the skull are held together by fibrous connective tissue and do not allow for movement between the adjacent bones. This lack of mobility is important, because the skull bones serve to protect the brain. [3]
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In linguistics, a denti-alveolar consonant or dento-alveolar consonant is a consonant that is articulated with a flat tongue against the alveolar ridge and the upper teeth, such as /t/ and /d/ in languages such as French, Italian and Spanish. That is, a denti-alveolar consonant is (pre)alveolar and laminal rather than purely dental.