ABSTRACT
Angina bullosa haemorrhagica is a benign phenomenon that is characterized by the sudden appearance of a blood blister on the oral mucosa in the absence of an identifiable cause or systemic disorder; local trauma has been suggested to be the most likely contributory factor. No treatment is required. Angina bullosa haemorrhagica affects mainly middle-aged and elderly people. There is no strong predilection for either men or women. In this article nine patients with such blisters are described. Blood blisters apparently are more common than has been suggested in the literature.
Subject(s)
Blister , Mouth Mucosa , Oral Hemorrhage , Adult , Aged , Aged, 80 and over , Blister/etiology , Blister/pathology , Female , Humans , Male , Middle Aged , Mouth Diseases/etiology , Mouth Diseases/pathology , Mouth Mucosa/injuries , Mouth Mucosa/pathology , Oral Hemorrhage/etiology , Oral Hemorrhage/pathology , Recurrence , Wounds and Injuries/complicationsABSTRACT
The working mechanism and the correct use of ultrasonic devices is discussed. Comparative efficiency of ultrasonic and hand instrumentation is evaluated for the removal of subgingival plaque and calculus, for the effect on root surfaces and for the ability in removing endotoxins. Possible side effects of the ultrasonic vibrations on the tooth structures and periodontal tissues, the incidence of bacteremias and the spreading of oral infections via aerosols are stated. Particular attention is given to the clinical results of both instrumentation technics and the necessity of root planing. One can conclude, that ultrasonics present an alternative and/or a supply for hand instruments, provided that a selective and careful use is taken into account.
Subject(s)
Dental Scaling/instrumentation , Periodontics/instrumentation , Ultrasonic Therapy/instrumentation , Dental Calculus/therapy , Dental Plaque/therapy , Dental Scaling/adverse effects , Dental Scaling/methods , Humans , Periodontal Pocket/therapy , Periodontics/methods , Root Planing/instrumentation , Ultrasonic Therapy/adverse effects , Ultrasonic Therapy/methodsABSTRACT
Recently, we have shown that, in rodent incisors, the crown- and root-analogue dentin (enamel- and cementum-related dentin) show differences in mineralization rates (Beertsen and Niehof, 1986) and composition of the organic matrices (Steinfort et al., 1989). It was the aim of the present study to determine whether these differences were accompanied by differences in the inorganic components. Rat incisors were analyzed by means of hardness measurements, microradiography, and the determination of Ca, Mg, and PO4 content. The outer circumpulpal dentin layer of the enamel-related dentin (ERD) was considerably harder and denser than the comparable layer of the cementum-related dentin (CRD). Concomitantly, a higher Ca and PO4 content was found for the ERD than for the CRD, while the reverse occurred with respect to Mg. From the apical end of the incisor toward the incisal edge, the Ca/PO4 ratio tended to decrease for both ERD and CRD, while the Mg/PO4 ratio increased. All differences appeared to be statistically significant. It is concluded that differences in the non-collagenous organic matrix were accompanied by differences in the inorganic components. More specifically, a relatively high content of highly phosphorylated phosphoproteins (ERD) was associated with a higher Ca and a lower Mg content.