摘要:

Abstract.Rabbit anti‐hamster brain sera prepared from the brains of Syrian and Chinese hamsters were evaluated for their potential to identify thymus‐derived lymphocytes present in these animals. The unabsorbed antisera were cytotoxicin vitrofor both homologous and heterologous thymocytes and splenocytes. Following absorption with hamster liver and erythrocytes, the antisera remained toxic for thymocytes, but were less toxic for splenocytes. Comparative testing of both the rabbit anti‐Syrian and anti‐Chinese brain sera with rabbit anti‐C3H mouse brain serum indicated that considerable cross‐reactivity exists between the different anti‐brain sera. Thein vivoadministration of any of the antisera to C3H mice resulted in a lowered titer to the thymus‐dependent sheep erythrocyte antigen response as measured by the hemolysis‐in‐gel technique.In vitrotreatment with the anti‐brain sera had no effect on plaque‐forming cell

ISSN:0904-2512    

DOI:10.1111/j.1600-0714.1975.tb01734.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY

摘要:

Abstract.Rats were passively immunized by an intraperitoneal injection of homologous anti‐BSA serum and their salivary glands were challenged 20 min or 24 hours later with BSA by the intraductal route. Immune complex sialoadenitis developed only when challenge was early. It is concluded that immunoglobulins are transferred from the circulation into the salivary glands and are relatively rapidly cleared by a mechanism yet unknown, possibly by salivary flo

ISSN:0904-2512    

DOI:10.1111/j.1600-0714.1975.tb01735.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY

摘要:

Abstract.A correlative histocytological study for keratinization was done in 446 cases of oral leukoplakia. Cytologically, keratinization could be correctly identified in 91 % of leukoplakias exhibiting orthokeratosis, 73 % of leukoplakias exhibiting parakeratosis, and 78 % of cases showing both types of keratinization. Cytologically, orthokeratosis was present in 83 % of individuals with homogeneous leukoplakia and in 69 % with ulcerated leukoplakia, while parakeratosis was present in 7 % of homogeneous leukoplakias and in 19 % of ulcerated leukoplakias. A higher frequency of dysplasia was observed in smears and their corresponding histological sections for those cases which had revealed only parakeratosis in the cytological examination and for both orthokeratosis and parakeratosis as compared to those showing only orthokeratosis.It is suggested that the cytological method is a reliable method for studying oral keratinization and is of value to the clinician in identifying the type of leukoplakias which may need to be biopsied for further surveillance.

ISSN:0904-2512    

DOI:10.1111/j.1600-0714.1975.tb01736.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY

摘要:

Abstract.Eight cases from a series of 75 odontomas were found to contain ghost cell epithelium. Clinical, radiologic and histologic findings in these cases did not differ significantly from those of odontomas in general. The results obtained with several staining methods, including rhodamin B under fluorescent light, suggest that the ghost cells represent different stages in the process of ortho‐, para‐ and aberrant keratin formation. Ghost cells should be viewed as the product of metaplastic transformation of the odontogenic epithelium with no significance for the prognosis and treatment of odonto

ISSN:0904-2512    

DOI:10.1111/j.1600-0714.1975.tb01737.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY

摘要:

Abstract.The pathogenesis of the three common forms of odontogenic cyst is discussed. It is concluded that the dental cyst arises from proliferation of the epithelial rests of Malassez in a focus of inflammation stimulated by pulpal necrosis of the associated tooth. It enlarges by unicentric expansion from the hydrostatic pressure of its contents.The dentigerous cyst arises from pooling of inflammatory exudate, which is derived from the obstructed follicular veins of an unerupted tooth and accumulates between the reduced enamel epithelium and the crown of the tooth. It enlarges by unicentric expansion from the hydrostatic pressure of its contents.The odontogenic keratocyst arises by proliferation of the residues of the dental lamina, possibly as a hamartomatous abnormality. It enlarges by both multicentric expansion due to the proliferation of localized groups of epithelial cells in the lining and by unicentric expansion from the hydrostatic pressure of its contents.

ISSN:0904-2512    

DOI:10.1111/j.1600-0714.1975.tb01738.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY

ISSN:0904-2512    

DOI:10.1111/j.1600-0714.1975.tb01739.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY