Echocardiographic assessment of cardiac function in the rabbit: a preliminary study.

A technique for obtaining M-mode echocardiograms in sedated adult rabbits of both sexes, New Zealand and California breeds, is described. Despite the fact that with rabbits there are certain technical difficulties in obtaining the M-mode echocardiograms, our preliminary results indicate that the following measurements could be the most useful and accurate: 1) left ventricular systolic time intervals; 2) right ventricular systolic time intervals; 3) right ventricular end-diastolic dimension; 4) left atrial internal dimension; 5) left ventricular end-diastolic and end-systolic dimensions; 6) systolic slope of the interventricular septum; 7) mid-diastolic partial closure of the mitral valve (EF slope); and 8) systolic slope of the posterior aortic wall.

Osteoporotic bone marrow defect: radiographic features and pathogenic factors.

The literature on osteoporotic bone marrow defect (OBMD) is reviewed, and an analysis of 20 additional cases is presented. The findings in this study are consistent with previous reports that the radiographic appearance may be indistinguishable from that of pathologic conditions; in some cases, the condition may be confused with aggressive tumors. It may also be significant that, in 16 of our 20 cases, the defects were found in regions where there had been previous extractions.

Complications of endodontic therapy in florid osseous dysplasia.

A case in which endodontic therapy triggered an exaggerated inflammatory reaction in a patient with preexisting florid osseous dysplasia is presented. We suggest prophylactic antibiotic treatment before endodontic therapy in patients with this condition.

The Keyes technique and self-inflicted injuries. Three case reports.

Three cases of self-inflicted gingival injuries resulting from the improper use of the Keyes technique are presented. The profession must assume responsibility for studies to determine the safety of the methods of application of the hydrogen peroxide, salt and baking soda mixtures and disseminate this information for the public interest.

Colonization of nonmelanocytic cutaneous lesions by dendritic melanocytic cells: a simulant of acral-lentiginous (palmar-plantar-subungual-mucosal) melanoma.

Four cases of colonization of nonmelanocytic lesions by dendritic melanocytic cells are reported, one in a verruca vulgaris of the lip, one in a squamous cell carcinoma in situ of mucous membrane overlying a tonsil, one in a lesion of lichen simplex chronicus with a nevocellular nevus of the external ear, and one in a dermatofibrosarcoma protuberans (Bednar tumor). This is an important biological process of melanocytes that must not be confused with the acral-lentiginous (palmar-plantar-subungual-mucosal (P-S-M) melanoma. It is probably much more common than the paucity of published reports would indicate.

[Post-phlebitis cutaneous calcinosis. Histochemical study].

A case of cutaneous localized calcinosis of the left upper limb is reported and classified as dystrophic calcinosis because the antecedent of superficial phlebitis. This kind of manifestation is rare in relationship with the frequence of superficial inflammatory processus of veins.

Intraoral melanoacanthoma.

A 39-year-old black woman noted a pigmented lesion on her right buccal mucosa of which she had been previously unaware. Physical examination revealed a 2.0 X 1.

Oral warty dyskeratoma.

Warty dyskeratoma of the oral mucosa is a rare cause of solitary mouth lesions. Of the thirteen reported patients, only three have been described in the dermatologic literature. We now present an additional patient, and review both the medical and the dental literature on warty dyskeratoma.

Necrotizing sialometaplasia: frequency of histologic misdiagnosis.

Necrotizing sialometaplasia is said to mimic carcinoma, both clinically and histologically. A review of approximately 10,000 oral biopsy specimens revealed only three cases of necrotizing sialometaplasia, all of which had been misdiagnosed as other benign entities. While this suggests that necrotizing sialometaplasia represents only 0.

Ethnic and cultural determinants of the perceptions of female dental students.

A survey of women dental students enrolled in all American and Canadian dental schools during the 1977-78 academic year was conducted to determine their backgrounds, current status, motivation regarding dentistry as a career, perception of the dental school environment, preferences in dental education, and future plans. The data were analyzed on the basis of ethnic or racial derivation to delineate differences in the perceptions of female dental students of various ethnic groups. Recognizing the nature of such differences may prove beneficial to dental educators, who must determine the specific problems faced by female students of various ethnic groups.

Ascorbic acid and pyridoxine in experimental anaphylaxis.

Two vitamins, ascorbic acid (AA) and pyridoxine have been suggested by others as useful drugs for the treatment of bronchial asthma, although the views concerning AA or controversial. We have tested both vitamins in some models of histamine release and experimental anaphylaxis. AA does not inhibit mast cell degranulation induced by phospholipase A and histamine release from isolated rat mast cells induced by compound 48/80 or antigen (egg albumin).

Oral discoid lupus erythematosus. A case report and review of the literature.

Literature on systemic and chronic discoid lupus erythematosus has been reviewed. The clinical and histopathologic changes in the oral cavity produced by these disorders are emphasized. A case of chronic lupus erythematosus with oral lesions is reported.