M. Ulmansky

Benign cementoblastoma: A review and five new cases

This article includes five new cases of benign cementoblastoma. The study includes a review on 66 previously published cases that we consider to be bonafide cases. It is considered that benign cementoblastoma continues to be an infrequent entity that particularly affects young patients under the age of 30. The sex distribution shows a slight tendency for being more common in females. The most frequently effected area is the mandibular molar-premolar region. Pain, expansion and, radiographic radiopacity surrounded by a peripheral radiolucent halo are the most striking features. Treatment and prognosis are also discussed. Histopathologic conditions and factors to be considered with respect to differential diagnosis conclude the report.

Correlation between age and thickness of cementum in impacted teeth

Abstract Sixty impacted, nonfunctioning permanent canines and premolars from patients 9 to 70 years old were used in a study of the characteristics and thickness of the cementum. A correlation coefficient test showed direct interdependence between the increase in thickness of the cementum and the age of the impacted tooth.

DOUBLE DENS IN DENTE IN A SINGLE TOOTH. REPORT OF A CASE AND RADIOLOGIC STUDY OF THE INCIDENCE OF SMALL DENS IN DENTE.

Abstract A double dens indente affecting a permanent central incisor of a 9-year-old boy has been reported. A study of 500 full-mouth roentgenograms was carried out, and the incidence of true and incipient dens in dente, deep lingual pits, and normal teeth in a nonselected population is presented. Both the “true” and the “incipient” forms of the lesion are discussed with regard to their genesis and clinical features.

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.

Dental pulp pathosis. Clinicopathologic correlations based on 109 cases.

Abstract A study has been carried out in order to examine the correlation between the clinical diagnosis of the affected dental pulp and its corresponding histologic appearance. One hundred nine affected pulps from permanent teeth were extirpated after their clinical state was assessed. They were evaluated histologically, and the results were compared. Absolute correlation was found in 49.5 per cent of the cases, while 46.7 per cent showed only a partial correlation.

Reaction of normal and inflamed dental pulp to Calxyl and zinc oxide and eugenol in rats

Abstract The effect of Calxyl and zinc oxide and eugenol upon normal and inflamed rat molar pulp after pulpotomy was investigated. It was found that a dressing of zinc oxide and eugenol does not stimulate the formation of a dentine bridge, while Calxyl does. Necrosis was the final outcome of experimentally induced acute pulpitis, and neither zinc oxide and eugenol nor Calxyl had any beneficial effect.

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.

Reaction of the rat molar pulp to direct capping with the separate components of Hydrex

Abstract Teeth treated with Hydrex, a hard-setting calcium hydroxide pulp-capping material, have shown pernicious features on the pulp. Hydrex is presented as two pastes which are mixed before use. Since one of them is based on calcium hydroxide, which promotes secondary dentin formation, it was thought that the resin-based paste is probably responsible for the deleterious effects. The present study performed on rat molars has shown that, whereas most of the pulps of teeth treated with the Hydrex base were healthy, all of those capped with the Hydrex catalyst presented pathologic changes, most of the pulps being necrotic.

Hydrex and its effect on the pulp. Preliminary findings on the rat molar.

Abstract The present study was performed on exposed pulps of rat molars capped with Hydrex. It is shown that Hydrex causes inflammation and necrosis of the pulp. Further clinicohistopathologic studies on the use of Hydrex should be encouraged, if it is assumed that human pulp may perhaps behave differently than rat molar pulp.

Experimental allergic sialoadenitis. II. Induction of acute sialoadenitis in rats by locally administered basement membrane antibodies.

Abstract Nephrotoxic serum or antiserum to glomerular basement membranes was instilled via the excretory duct into the parotid gland of rats. Acute necrotizing sialoadenitis, accompanied by vasculitis, developed within 1 day after instillation. The inflammatory process is probably caused by an immune reaction between antigens of parenchymatous and/or vascular basement membranes of the gland and the introduced antibodies.