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Biomedical subjects

J J Pindborg

Publications and source records attributed to J J Pindborg.

At least 163 records · Page 9Linked to original sources
PubMed1976

Size of nucleus and nucleolus in quantitative electron microscopy on orthokeratinized leukoplakias.

Eleven leukoplakias of the homogeneous orthokeratotic type and control areas in the same patient were studied by means of standardized electron microscopic preparations of biopsy material and by methods of stereology applied to electron micrographs. In leukoplakias, nuclei and nucleoli were consistently enlarged at three epithelial levels, nucleoli in the basal cells averaging twice the control size. Comparison with specimens of mucosa of the hard palate showed that the enlargement of nuclei and nucleoli in orthokeratinized leukoplakias was in excess of the normal size differential between inherently orthokeratinized and nonkeratinized regions of the human oral mucosa. This suggests an abnormal stimulation of protein-synthetic activity even in this prognositcally "benign" type of leukoplakia.

Adult↗
PubMed1975

Incidence of oral cancer among 30,000 villagers in india in a 7-year follow-up study of oral precancerous lesions.

In three districts of India where an oral precancer registry comprising 30,000 individuals was established in 1967, regular follow-up surveys have been conducted. This paper discusses the results of a 7-year follow-up study. In Bhavnagar district only one case or oral cancer was reported in this study. In the districts of Ernakulam and Srikakulam, age-adjusted annual incidence rates for oral cancer were found to be 33 and 22 per 100,000 respectively. The significance of tobacco habits and oral submucous fibrosis as etiologic factors is discussed.

Adult↗
PubMed1975

Dental mutilations among villagers in Central Java and Bali.

In Central Java and on the island of Bali 779 and 437 villagers respectively were examined for dental mutilations. In Java 81.1% of the males and 99.2% of the females showed dental mutilations in the form of grinding the incisal and vestibular surfaces of the maxillary incisors and canines. In Bali, the figure for males was 91.3% and for females 96.6%. In Java as well as on the island of Bali most of the mutilations had been subjected to artificial staining. The authors have found a relief in the temple of Borobudur, built about 800 A.D., possibly depicting the performance of a dental mutiliation.

Adolescent↗
PubMed1975

Ghost cell epithelium in odontomas.

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 odontomas.

Adolescent↗
PubMed1975

Microscopic features of the lateral periodontal cyst.

The lateral periodontal cyst is of developmental odontogenic origin and must be differentiated from the gingival cyst of adults, a primordial cyst in a lateral periodontal position, and a cyst of inflammatory origin. This paper is based on a histologic study of five cases. Four were in the mandibular premolar region and one in the lateral incisor-canine region of the maxilla. The cysts are lined by a thin non-keratinized epithelium which resembles the reduced enamel epithelium. Many of them arecharacterized by the presence of localized plaque-like thickenings of their epithelial linings, consisting of fusiform or large swollen, edematous cells. These epithelial thickenings appear to result from a localized proiferation of basal cells. The lateral periodontal cyst may arise initially as a dentigerous cyst which develops by expansion of the follicle along the lateral surface of the crown and comes to lie on the lateral aspect of the root if tooth eruption is normal. Alternatively, it may arise from the cell rests of Malassez.

Epithelial Cells↗
PubMed1973

Smoking habits and histological characteristics of oral leukoplakias in Denmark and Hungary.

The smoking habits of 345 Danish and 184 Hungarian leukoplakia patients were analysed against the histopathology of the leukoplakias, i.e. type of keratinization, epithelial thickness, epithelial dysplasia and inflammation. In spite of the reasonable size of the numbers forming the basis for the analysis, no statistically significant differences were found between smokers and non-smokers. However, it was found that the frequency of epithelial dysplasia is not higher among smokers than among non-smokers.

Atrophy↗