Biomedical subjects
Publications and source records attributed to A Samant.
A clinical report of bilateral swelling caused by an over-extended mandibular denture impinging over Wharton's duct has been described. The swelling disappeared after the obstruction of the duct was relieved.
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This article reports a case of oral herpetic lesions that recurred several times over 1 1/2 years in an edentulous 65-year-old woman. The patient was under treatment for complete dentures at the New Jersey Dental School. A differential diagnosis of mucosal ulcerative lesions is described, along with the laboratory methodology for confirmation of herpes simplex virus type 1 (HSV-1) infection.
As an alternative to complete dentures, overdentures are well established as a sound therapeutic modality for patients with terminal dentition. By utilizing natural tooth roots and their periodontal structures to aid in support, overdentures maintain proprioceptive mediation and a mechanism for masticatory force vectors that favor bone retention over bond resorption. The degree of stability enhancement and denture retention from retained roots varies with the design and environment of the prosthesis. This article reviews various aspects of removable partial over-denture use.
Magnets were used only occasionally for dental purposes several decades ago. Since the advent of rare earth magnet alloys, however, intraoral magnets are shaping the course of aesthetics and retention for both complete and removable partial overdentures. Their benefits include simplicity, low cost, self-adjustment, inherent stress breaking, automatic reseating after denture displacement, comparative freedom of lateral denture movement, a low potential for trauma to the retained roots, and elimination of the need for adjustment in service. The clinical procedures involved in their application do not require any special skills, and the options offered by the various manufacturers give the dentist a wide variety of choices in selecting an appropriate treatment plan. Clinical experience has shown that magnetic retention offers an economical alternative for teeth that would otherwise require expensive or extensive restorative treatment, and can be used as an effective and often superior replacement for failed bridgework. Finally, it is clear that overdenture treatment per se is a valuable option for the dentist, and the use of magnets expands this option to the retention of tooth roots that might otherwise be scheduled for extraction. The natural tooth root, even if periodontally involved, can serve as a useful aid in denture support and retention, and should be regarded as at least as good as, and in most cases superior to, an implant. It is also much less expensive.
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Continuous electrocardiographic monitoring of 225 patients with acute myocardial infarction was performed during the initial 48 hours after admission. Two hundred twelve episodes of ventricular tachycardia occurred in 49 subjects, and 8 patients had primary ventricular fibrillation. Most cases of ventricular tachycardia were associated with late coupling of premature ventricular complexes. Of the 212 instances of ventricular tachycardia, 42 (20 percent) were initiated by a premature complex on the T wave (R on T) (R-R'/Q-T less than 1), and 93 (44 percent) had initiating premature complexes that occurred directly after onset of the sinus P wave (R on P). Of eight episodes of ventricular fibrillation, seven were initiated by a premature ventricular complex and in four of these there was associated R on T phenomenon. The influence of atrial contraction and myocardial stretch on reentry or ectopy is proposed as a possible explanation for the relatively high incidence rate of ventricular tachycardia observed after the onset of the sinus P wave.
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Forty pregnant women in each of three trimesters of pregnancy and forty nonpregnant women of comparable age, socioeconomic status and dietary habit have been examined to evaluate the gingival condition and the calculus and debris deposits. The study has shown that: There is a significant increase in the severity of gingivitis during pregnancy; The gingival changes progressively increase during the course of pregnancy; The gingival changes are more marked than the periodontal changes seen during pregnancy (increase in periodontal disease was seen in only a limited number of cases); There was an appreciable increase in the calculus and debris deposits in the pregnant as compared to the nonpregnant women; Increase in the calculus and debris deposits was apparent in all the trimesters of pregnancy; Gingival changes showed a greater correlation with the calculus and the debris index in the pregnant than in the nonpregnant women; The role of the irritant oral deposits either as a precipitating or perpetuating factor in the genesis of gingivitis during pregnancy can not be excluded.
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