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Scanning electron microscopic observations of cell populations and bacterial contamination of membranes used for guided periodontal tissue regeneration in humans

, : Scanning electron microscopic observations of cell populations and bacterial contamination of membranes used for guided periodontal tissue regeneration in humans. Journal of Periodontology 61(8): 515-520

Fourteen intrabony periodontal defects and six furcation defects (Class II) were treated by a flap procedure which included the use of a polytetrafluoroethylene membrane to allow guided tissue regeneration. After 4 to 6 weeks of healing, the membranes were retrieved and examined by scanning electron microscopy for the presence of adherent cells and other tissue elements. The cervical open pore-structured collar of the membrane, which in most cases had become partially exposed to the oral cavity, had a deposit of bacterial plaque. Bacterial Bacterial colonies and a scatter of single cells in some instances extended into the mid-third of the membrane. Fibroblast-like cells and, in some specimens, blood vessels and fibrous structures were seen in the mid-third and deep parts of the membrane. Generally, however, the occlusive portion of the membrane was characterized by a sparseness of adherent tissue elements. There did not seem to be a systematic difference in the nature and distribution of the adherent structures on the inner and outer surfaces of the membrane. The findings suggest that, in addition to preventing flap tissues from contacting the root surface, an important function of the membrane is to protect the integrity of the underlying blood clot by diverting mechanical stress acting on the flap during early stages of healing.


PMID: 2391630

DOI: 10.1902/jop.1990.61.8.515

Other references

Atzori, L.; Congiu, L., 1996: Effect of verapamil on allyl alcohol hepatotoxicity. The effects of verapamil, a calcium channel blocker, on allyl alcohol (AA) hepatotoxicity were studied in vivo. AA administration induced an increase of serum alanine aminotransferase (ALT) concentration and liver necrosis by means of glutathione...

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Rosales, M.T.L.; Escalona, R.L.; Alarcon, R.M., 1985: Organochlorine hydrocarbon residues in sediments of two different lagoons of northwest Mexico. Bulletin of Environmental Contamination and Toxicology 35: 2-30

Dryer, J., 1996: U.S. dairy marketers listening to consumers. A brief account is presented of growth in the USA liquid milk, yoghurt, frozen dessert and cheese markets in 1995, as influenced by consumer preferences.

Miles L.A.; Rothschild Z.; Griffin J.H., 1981: Dextran sulfate stimulated fibrinolytic activity in whole human plasma dependence on the contact activation system and on a uro kinase related antigen. Thrombosis & Haemostasis 46(1): 211

Hudson, A.P.; Woodward, F.E.; Robinson, L., 1996: Controlled release fertilizers and methods of production. Official Gazette of the United States Patent & Trademark Office Patents 1188(4): 2775, July 23

Heimbucher, J.; Tigges, H.; Fuchs, K.H.; Benecke-Timp, A.; Thiede, A., 1999: Patient selection for laparoscopic gastric banding operation. This study presents methods and results of a systematic selection of patients for laparoscopic gastric banding. A seven-step selection process considering anamnestic data, comprehensive counseling of patients and relatives, standardized psychologi...

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