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Biomedical subjects

J Lustmann

Publications and source records attributed to J Lustmann.

At least 55 records · Page 3Linked to original sources
PubMed1981

The hypoglossia--hypodactylia syndrome. Report of 2 cases.

Two additional cases of the hypoglossia-hypodactylia syndrome are reported. The major features of this syndrome are a reduction in tongue size, micrognathia, and limb anomalies. The presence of these anomalies is essential for the diagnosis of this birth defect. The cause of the syndrome is unknown, but a number of theories have been proposed. Treatment of these cases has been directed toward improving tongue, lip, and mandibular function.

Adolescent↗
PubMed1981

Oral cysticercosis. Review of the literature and report of 2 cases.

Oral cysticercosis is a rare condition in man. Our 2 cases bring the total number of published cases to 25. Although it is rare, the cysticercosis should be considered in the differential diagnosis of intra-oral nodules, especially in high incidence areas. Multiple foci are very common and every cases with oral cysticercosis should undergo thorough general examination. Surgical excision is the treatment of choice.

Adult↗
PubMed1981

Salivary calculi: ultrastructural morphology and bacterial etiology.

Ultrastructural morphology of 16 salivary calculi was studied by means of transmission and scanning electron microscopy. The external surface was mostly globular or coarse, and on high magnifications and features could be divided into four main groups: a) amorphic calcified deposits covering extensive areas, b) other areas covered with crystals in a variety of arrangements, c) heavy accumulations of calcified rod-like and filamentouslike microorganisms, and d) platelet crystals in juxtaposition to calcified microorganisms in several areas. In most calculi the split area was found to be laminated. It is suggested that microorganisms have an important role in the formation and growth of salivary calculi.

Bacteria↗
PubMed1979

In vitro evaluation of enamel and cementum abrasion after toothbrushing.

Abrasion in human teeth brushed with toothbrush and dentifrice was evaluated quantitatively by SEM. Specimens which included surface enamel and cementum were cut from unerupted wisdom teeth. Controlled brushing was carried out by a brushing machine, with dentifrice or saline, for periods of five and ten minutes. Scratches were counted using SE micrographs. No scratches were observed on the enamel surfaces, due probably to its hardness. The cementum surfaces revealed scratches, the number increasing with the duration of burshing. Brushing with saline was much less abrasive than with dentifrice. It was concluded that damage to the cementum is caused primarily by the dentifrice, brushing per se being a minor factor.

Adult↗
PubMed1978

Central giant cell granuloma and periapical fibrous dysplasia occurring in the same jaw.

A 19-year-old woman presented with two tumorlike conditions in the mandible. Seven vital mandibular teeth were associated with periapical lesions. One periapical lesion was enucleated and histopathologic examination confirmed the diagnosis of periapical fibrous dysplasia. The second lesion was a large multilocular radiolucency which extended from the mandibular left premolars to the ascending ramus. It was diagnosed as a central giant cell granuloma despite having many features in common with those of an ossifying fibroma. The lesion was removed and healing was uneventful.

Adult↗
PubMed1978

Dentinoenamel junction area in primary teeth affected by Morquio's syndrome.

Separation of dentin from enamel in the dentinoenamel junction area was achieved in primary teeth affected by Morquio's syndrome. Enamel and dentin junctional surfaces were examined by means of scanning electron microscope. These two tissues were found to be separated by a layer of amorphous material. Recurrent treatment of the amorphous layer with NaOCl caused its gradual removal, exposing the rod tips on the enamel side and tubules on the dentin side. It is reasonable to suppose from this finding that the amorphous layer is rich in organic matrix. It is suggested that this amorphorus layer is analogous to the enamel-dentin membrane, that in this syndrome is only partially calcified.

Acid Etching, Dental↗
PubMed1978

The mural ameloblastoma: a review of the literature.

Mural ameloblastomas are estimated to constitute 5% of all ameloblastomas. Although resembling the total ameloblastoma population in terms of predilections for sex and site, the average age of the patients with mural ameloblastoma, in comparison with the total group, was 21.8 vs 38.9 years. Eighty-five percent of the mural ameloblastomas were associated with follicular cysts, all of which were observed before the age of 30. The frequency of recurrence after simple enucleation of the cyst containing this lesion is considerably lower than that for ameloblastomas in general that are treated in a similar manner. Therefore, further and more extensive surgery for mural ameloblastoma is justified only in the event of recurrence.

Adolescent↗
PubMed1976

Scanning electron microscopy of dental calculus.

The morphologic structure of anorganic dental calculus was studied by means of the scanning electron microscope. From surface observations, calculus is apparently composed of two components with distinguishable patters of calcification. One component is formed by the precipitation of minute calcific crystals on microorganisms and intermicrobial substances (plaque matrix). Such calcified masses, often spherical in shape, have a sponge-like appearance with empty spaces representing the former sites of entombed and degenerated organisms. Thus, intracellular calcification is not evident at this stage of calculus development. The other component, although having at least one common calcification front with the former, does not appear to be directly associated with microbial calcification. It exhibits a configuration of generally larger crystal growths of varying shapes and sizes. These two calcification patterns are comparable, both in distribution and size, to what has been observed by means of the transmission electron microscope, and what Schroeder has designated as "types A & B centers of mineralization," respectively. The calcific precipitation in type A centers have been identified by X-ray diffraction as hydroxyapatite. It is, therefore, speculated that the crystal patters in type B centers might represent other known forms of calcium phosphates present in calculus, such as octacalcium phosphate, whitlockite and brushite.

Calcium Phosphates↗
PubMed1976

Structural changes in odontodysplasia.

Report is made of a histologic and scanning electron microscopic (SEM) study of teeth affected by odontodysplasia. The enamel was found to be thinner than normal, and the entire surface showed numerous depressions. The prismatic orientation, diameter, and density were found to be normal. Although the mantle dentin remained normal, the rest of this tissue showed a tendency to globular formation. The orientation, density, size, and shape of the dentinal tubules appeared to be normal. The cementum, in general, was normal, but in some instances appeared to be scalloped or globular. The pulp consisted of normal tissue but was found to be larger than normal. The presence of denticles was an outstanding feature.

Dental Enamel↗
PubMed1976

Central hemangioma of the maxilla.

A case of central maxillary hemangioma is reported in which the only clinical symptom was spontaneous, recurrent, gingival papillary bleeding between the maxillary left premolars. The radiographic findings were inconclusive. It is strongly recommended that in cases where this diagnosis is suspected, surgical intervention be carried out under optimal conditions in an operating theater under hypotensive general anesthesia and with an ample supply of whole blood available.

Adolescent↗
PubMed1975

Odontodysplasia. Report of two cases and review of the literature.

Odontodysplasia is a rare developmental anomaly affecting the tooth structures in both deciduous and permanent dentitions. The enamel is thin and uneven in thickness, and the detinal tissue surrounds very large pulp chambers. Denticles are present in the pulp organ. The maxilla is involved twice as frequently as the mandible. Most of the affected teeth are in the anterior segments; however, all other teeth can be affected. The cause is unknown. Because of the tendency of the affected teeth to develop abscesses, the most common treatment is extraction. Two additional cases are reported, and the literature is reviewed.

Abscess↗
PubMed1975

Dentigerous cysts and radiolucent lesions of the jaw associated with Hunter's syndrome.

Two cases of Hunter's syndrome in brothers are presented. One case was associated with dentigerous cysts and the other was associated with collagenous connective lesions. Condylar deformities also were present in both cases. Radiographic differential diagnosis between the two types of lesions is discussed and methods of treatment are proposed.

Adolescent↗