摘要:

One‐side gingivitis was induced in 21 individuals by local abolition of tooth cleansing for 15–17 days. Adjoining sections of biopsies from the non‐cleansing side as well as from the control side with good tooth cleansing were stained with toluidine blue (pH 1.0), acridine orange (pH 0.5), astra blue (pH 0.2—0.3), alcian blue‐safranin and the EACNAS‐GBC technique in order to demonstrate mast cells specifically. The clinically normal gingiva was found to be rich in mast cells. In the inflamed tissue, the number was increased, especially in the pocket area of the connective tissue. The difference was due to an increase of both mature and, particularly, of immature mast cells. In those cases, where the inflammatory infiltrates were heavy, however, the number of mast cells was reduced in the area of cellular infiltration. The results indicate that products from the bacterial plaque at the gingival margin may directly or indirectly induce proliferation of mast cells in the adjacent connective tissue. Above a certain degree of stress, however the mast cells may respond by degranulation and release their active substances, which by contributing to the inflammatory reaction may enhance the local

ISSN:0022-3484    

DOI:10.1111/j.1600-0765.1969.tb01945.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

An histological investigation has been carried out on the periodontal tissues of young rats fed for eight weeks on diets deficient either in calcium (calcium content 0.026 per cent; calcium to phosphorus ratio 0.058), vitamin D, or calcium and vitamin D, in which protein was supplied either as blood albumen or egg albumen.When the diet contained blood albumen, the deficiency of calcium resulted in alveolar changes resembling osteoporosis and in a reduction in the number and diameter of the fibres of the periodontal ligament. When the diet contained blood albumen, the deficiency of calcium and vitamin D caused alveolar changes resembling osteoporosis and a reduction in the number and diameter of the fibres of the periodontal ligament. The deficiency of vitamin D had no obvious effect on the periodontal tissues of the rat. The substitution of egg albumen for the blood albumen in the diets intensified the osteoporotic changes caused by the deffciency of calcium. In rats deficient in calcium and vitamin D it superimposed an osteomalacic change, resulting in a condition of the alveolar process which resembled a combination of osteomalacia and osteoporosis. It also increased the incidence of areas of resorption of primary cementum in all dietary groups. The cementoid on the surface of secondary cementum behaved under these conditions of dietary stress in the same way as the osteoid. The manner in which the dietary deficiencies may produce these changes is discussed.

ISSN:0022-3484    

DOI:10.1111/j.1600-0765.1969.tb01946.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

Measurements of alveolar bone resorption were made on radiographs of 28 Anglo‐Saxon and 46 17th. century mandibles. The amount of resorption was found to be significantly greater in the mandibles of the 17th. century than in those of the Anglo‐Saxon period, this difference being most pronounced in the region of the 2nd. premolar tooth. Changes in diet, particularly in its physical consistency, are suggested as the main factors in this increase in alveolar bone l

ISSN:0022-3484    

DOI:10.1111/j.1600-0765.1969.tb01947.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

An objective method is described for estimating the periodontal state of human skulls. Two measurements were made for each tooth from the alveolar crest to the amelo‐cemental junction and, from the average of these for the whole mouth, an estimate was calculated called the Tooth Cervical Height‐Index. It was found possible to repeat measurements with a considerable degree of precision. When forty skulls with varying degrees of periodontal disease were examined a significant correlation was recorded between the T.C.H.‐index and the periodontal state as estimated using clinical criteria (after Rus

ISSN:0022-3484    

DOI:10.1111/j.1600-0765.1969.tb01948.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

ISSN:0022-3484    

DOI:10.1111/j.1600-0765.1969.tb01949.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY