Search PubMed⌕ Search

Biomedical subjects

H Tal

Publications and source records attributed to H Tal.

At least 91 records · Page 5Linked to original sources
PubMed1984

Tooth loss and tooth retention in a multitribal group of Bantu-speaking South African blacks: a study on 500 dry mandibles.

Tooth loss and tooth retention in adult South African Bantu-speaking Negroes were studied from data derived from 500 dry mandibles. The tribe, sex, and stated age of the specimens were available. Mandibles were equally distributed over the third to seventh decade of life. The presence of dental units was recorded and analysed within and between decade age groups. The mandibles carried a total of 5,459 dental units. Between the third and fourth decades of life and between the sixth and seventh decades, the reduction of the frequency of dental units was mild and statistically not significant. It was, however, severe and significant between the fourth and fifth, and the fifth and sixth decades. In the third-decade group, most teeth were found in the anterior region with a tendency to diminish in number posteriorly. After the third decade there was a definite persistence of first premolars and canines with significant tendency toward loss of teeth anterior and posterior to them. Only the incisors and third molars showed significant reduction in number from the third to the fourth decade. The reduction of all teeth was statistically significant later, until the sixth decade of life. Although there was loss of teeth from the sixth to the seventh decade, it was not significant for any of the homologous dental units. There is a possibility that some dietary differences existed between the older subjects (50-70 years old) and the younger ones (20-49 years old) which may have had some influence on the results.

Adult↗
PubMed1984

Multiple mucous retention cysts of the oral mucosa.

While mucoceles of the oral mucosa are relatively common, multiple mucous retention cysts have not previously been reported. In this article two such cases, in which numerous minor salivary gland ducts had dilated to the point of cyst formation, are described. The number of individual cysts exceeded 100 in each case. Since it is clear that these cysts formed as a result of dilatation of salivary ducts, it would seem that either the ducts were blocked by altered secretion or there was an acquired or congenital weakness in their structure.

Aged↗
PubMed1984

Relationship between the interproximal distance of roots and the prevalence of intrabony pockets.

The interproximal distance between adjacent root surfaces and the presence of intrabony pockets (IBP) facing these surfaces, was measured and recorded during 114 gingival flap procedures in 81 patients. Measurements were carried out in 344 interproximal areas and 117 IBP were detected at these sites. The correlation between the interproximal distance and the presence of IBP was positive and statistically significant (r = 0.81; P less than 0.001). The frequency of IBP increased with increasing interdental distance (slope (s) = 5.723). When interdental distances between 2.1 and 4.5 mm were analyzed, the correlation and slope were high (r = 0.96; P less than 0.01; s = 19.87). No significant correlation (r = 0.36; P greater than 0.4) existed when interproximal distances greater than 4.6 mm were analyzed separately. Intrabony pockets were frequently associated with interproximal distances greater than 2.6 mm (20-57.1%). They were less common (5-20%) when the interproximal distances were less than 2.6 mm. Two IBP in the same interdental areas were present only when these areas were greater than 3.1 mm. Based upon the present data, it seems that the frequency of IBP increased as the distance between adjacent teeth increased. However, when this distance was 4.6 mm or more, no further increase in the percentage frequency of IBP was noted.

Adult↗
PubMed1984

The prevalence and distribution of intrabony defects in dry mandibles.

One hundred mandibles of South African Negroes were examined for the presence of intrabony defects, and the distance between the cemento-enamel junction and alveolar bone crest was measured along the buccal and lingual surface of roots associated with interdental craters. Two-hundred thirty-one intrabony defects were detected (4.1% of the possible occurrences). There were 51 craters, 19 of which were associated with the distal surfaces of the second molars. Most craters (84.3%) had higher lingual than buccal walls. Seventy-one defects (35.8%) were one-walled pockets, 98 defects (49.6%) were two-walled pockets and 30 (15%) were three-walled pockets. Twenty-eight one-walled pockets (39.4%) formed hemisepta against interproximal root surfaces. Mesial surfaces of canines were the most commonly involved with hemisepta. There was an increase in the frequency of intrabony pockets from the anterior to the posterior zones of the mandibles. Interproximal root surfaces were by far more commonly associated with defects than buccal or lingual surfaces.

Adult↗
PubMed1983

Alveolar dehiscences and fenestrae in dried South African Negro mandibles.

The buccal and lingual roots of 1077 teeth from 100 mandibles of South African Negroes were examined for the presence of dehiscences and fenestrae. All specimens were obtained from cadavers of known sex, tribe, and stated age; 10.5% of teeth were affected. Canines and first premolars were the most common teeth associated with dehiscences and fenestrae. Dehiscences occurred more commonly than fenestrae (1:0.49). The defects were found exclusively in the buccal plate of the alveolar process.

Adult↗
PubMed1982

Clinical and histological changes following cryotherapy in a case of widespread oral leukoplakia.

The effects of cryotherapy on widespread leukoplakia of the buccal and vestibular mucosa were observed clinically and studied histologically. The treated areas were clinically normal 2 months after treatment, and discomfort and inconvenience of treatment were minimal. The epithelium, which was initially orthokeratinized, with mild dysplasia, and which was almost entirely lacking in glycogen, reverted to the parakeratinized or non-keratinized form, with normal distribution of glycogen in the stratum spinosum.

Cryosurgery↗
PubMed1982

Relationship between the depths of furcal defects and alveolar bone loss.

The depths of furcal defects (excluding through-and-through) and the distances between the cementoenamel junctions and alveolar bone crests were measured on 245 lingual surfaces and 235 buccal surfaces of 246 first and second molars, in 100 dry mandibles of South African Negroes. Analysis of the measurements shows that: (1) There is a high correlation between depths of furcal defects and the distances between cementoenamel junctions and alveolar bone crests in surfaces of all molars. (2) For the same degree of vertical bone loss, buccal furcal defects are deeper than lingual ones and buccal furcal defects on first molar teeth are deeper than those on second molar teeth (P less than 0.05). (3) There is no significant difference (P greater than 0.5) between the measurements on the right and left mandibular teeth.

Adult↗
PubMed1982

Furcal defects in dry mandibles. Part I: A biometric study.

Two hundred and eighty-eight first and second molar teeth in 100 dry mandibles from South African Negro skulls were examined for the presence of furcal defects. The depths of the furcal defects were measured. Analysis of the measurements showed that: (1) first molars are more severely affected than second molars; (2) the buccal sides of furcae are more severely affected than the lingual; (3) mean furcal depth increases markedly from the 3rd decade of life to the 4th in all surfaces examined. Because the analysis is complicated by through-and-through defects, no unequivocal trend can be shown; and (4) there is no difference between the furcal depths on the left and right sides.

Adult↗
PubMed1982

Furcal defects in dry mandibles. Part II: Severity of furcal defects.

Two hundred and eighty two first and second molar teeth from 100 dry mandibles of South African Negro skulls were scored by four degrees of severity of furcal involvement. The severity was judged by whether the furca was involved from one or both sides, by the depth of the defect on each side and by the sum of the depths of the defects on both lingual and buccal sides. Analysis of the frequencies of the scores show that: (1) First molars are more severely affected than second molars; (2) There is a general trend of scores 1 and 2 (normal and mild involvement) to be predominant in the 3rd decade of life, while by the 5th, 6th and 7th decades scores 3 and 4 (moderate and severe involvement) predominate; (3) The difference between the frequencies of all the scores for the right and left sides was not significant.

Adult↗