Acta odontologica venezolana最新文献

The purpose of this study was to prepare a protein solution to simulate natural saliva using mucin extracted from bovine submaxillary gland. The extraction process was done in keeping with Drans & Leung's (1980) modified technique. Once the bovine submaxillary gland was extracted (approximately 500 g), it is cut and stored in distilled water for 12 hrs at 4 degrees C in order to eliminate any tissue or blood remaining in the section. The tissue is then homogenized and suspended in a phosphate buffer solution with a pH of 7 for 48 hours. The solution is then centrifuged and the supernatant is treated to extract the protein present in the solution. The remaining solution is dialyzed with distilled water, changed three times and then lyophilized. The lyophilized product is diluted in distilled water (1 g/1) taking aliquots to determine the pureness of the proteins. The solution obtained has a viscosity and protein composition which is very similar and offers great advantages for use in patients who suffer from severe xerostomy.

A review of the literature is done concerning Pyogenic Granuloma. From two hundred and thirty eight cases of our files. Twenty four cases are separated which are considered histopathologically different and to which the term Lobular Capillary Hemangioma is more applicable. Epidemiologic studies are analyzed and conclusions are established. Pyogenic Granuloma is more a reactive type of lesion of inflammatory nature, while Lobular Capillary Hemangioma separated as an entity is considered a lesion of benign neoplastic nature and vascular origin.

In general differences in plaque composition between anterior and posterior teeth have been reported. Dental plaque from the upper lower anterior teeth shows differences in bacterial composition and pH. Results showed that plaque from lower anterior teeth contained less alkali soluble polysaccharide per unit weight than did plaque from upper anterior teeth. However no differences in the concentration of water soluble and insoluble polysaccharide were observed. Plaque from posterior teeth did not show differences.

A review of the literature is done concerning labial melanotic macule. Several aspects are studied such as definition, clinical significance and histopathology. A new case is added, located in the lower lip. Several observations are done and conclusions are drawn. Emphasis is given to the need of determining the etiology of the lesion.

The communication between the dentist and the patient, or what we have called dentist-patient relationship constitute itself a clue to solve primary problems derived of the professional practice. In this relationship with patients, the dentist may face what we have called difficult patient. This difficult patient have several behavioral characteristics which can alter the dentist emotional equilibrium, the capacity of making proper diagnosis and finally a successful treatment may not be obtain as an end result. The difficult patient behavior may be explained by a variety of factors such as: the type of pathology, the office environment, the community and/or institution to which the patient belongs, the dentist emotional circumstance and at last the patient life style. In this research work, we interview 50 professionals from the metropolitan area with an average of 18 years in practiCe, each dentist explained situations in which the patient behavior could be typified as difficult. A number of 202 difficult patient cases were obtained and they were classified into 14 categories. 5 categories presented a higher frequency: a) Schedule and/or appointment timing. b) Patients not following instructions and/or altering treatment. c) Anxious patients. d) Patients unhappy with their treatment. e) Authoritarian patients or patients without good manners. This 5 categories were present in the 60% of the situations and can be taken as a model with specific behavioral characteristics as to identify the difficult patient. This is valuable in order to manage this type of patients and be successful.