Periodontal membrane

A study of the degradation of a biodegradable composite periodontal membrane was the subject of investigations using both Raman and mid-IR... 

The primary symptoms of acute exposure to high concentrations of chloroprene by inhalation in the chloroprene-rubber industry include nervous system depression, injury to the lungs, liver and kidney, irritation of the skin and mucous membrane, and respiratory difficulties (Nystrom, 1948). Arevshatyan (1972) also reported pathomorpholo-gical changes in the peridontium (periodontitis, gingivitis, erosion of teeth and caries)... 

Veronese, F. M., Marsillo, F., et al. Polyphosphazene membranes and microspheres in periodontal diseases and implant surgery. Biomaterials 20(l) 91-98, 1999. 

Toothache is due to inflammation of the pulp or periodontal membrane of a tooth. Both structures are well supplied with nerves, which send impulses to the cerebral cortex where pain is perceived. 

Fig. 3.5 The periodontium. The periodontium consists of the gingiva and underlying periodontal membrane. Both are is composed of large bundles of collagen mixed with large and small oxytalan fibers that allow the periodontium to respond to violent movements of the tooth within the jaws during mastication...

Proteo-glycosaminoglycans determine the structure of cartilage, the permeability of basement membranes to small molecules, the stability of collagen fibrils, and the response of tendons, cartilage and periodontal ligaments to injury. 

By contrast, in necrosis, severe physical, chemical, or bacterial damage causes a cell membrane to burst, releasing apoptotic mediators (Sect. 13.4.3) and proinflammatory cytokines into the stroma (Sect. 13.2.2). The cytosolic enzymes continue to make lactic acid in the absence of mitochondrial function, making the necrotic environment strongly acidic and activating lysosomal enzymes (Sect. 13.2.1) to digest the released cytosolic contents. Necrosis is discussed in relation to aggressive periodontitis (Chap. 14). 

The use of antibacterial prophylaxis remains controversial owing to a lack of consistent efficacy, potential for development of resistant bacteria, high cost, and lack of impact on patient survival. Therefore, antibacterial prophylaxis is not recommended routinely for all neutropenic patients. Prophylaxis (with trimethoprim-sulfamethoxazole or quinolone-penicillin) generally is indicated for patients expected to be profoundly neutropenic for more than 1 week, such as HSCT patients. Additional risk factors that may provide justification for prophylaxis include mucous membrane or skin lesions, presence of indwelling catheters, need for instrumentation, severe periodontal disease, or other risk factors. Neutrophil recovery eliminates the need for continued prophylaxis, and recovery may be facilitated by use of... 

Taddei, P., Monti, P. and Simoni, R. (2002) tibrational and thermal study on the in vitro and in vivo degradation of a poly(lactic acid)-based bioabsorbable periodontal membrane. Journal of Materials Science Materials in Medicine, 13,469-475. 

Uses Material for drug delivery systems, medical and pkg. applies., sutures, bone pins, periodontal membranes Manuf./Dlstrlb. DuPont http //www.dupont.com Trade Name Synonyms LGA-5005 [Wako Chem. USA] LGA-5010 [Wako Chem. USA] LGA-5015 [Wako Chem. USA] LGA-5020 [Wako Chem. USA] LGA-7505 [Wako Chem. USA]... 

Yukna, R. A., Evans, G. H., Aichelmann-Reidy, M. B., and Mayer, E. T. (2001), Clinical comparison of bioactive glass bone replacement graft material and expanded polytetrafluoroethylene barrier membrane in treating human mandibular molar class n ftncations, J. Periodontal. 72(2) 125-133. 

Microporous membranes have been used for periodontal tissue regeneration. T q)ically, the periodontal flap is cut, and the membrane is surgically inserted to cover the surface of the tooth root and to physically occlude epithelial cells from apically migrating along the root surface. 

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