Practica odontologica最新文献

Secretory IgA antibodies may modulate colonization of the epithelial and dental surfaces by different species of microorganisms. The application of enteric vaccines may probably permit controlling caries frequency infants and children. However, the complexity of bacterial communities involved in inflammatory periodontal diseases, currently prevent developing strategies aimed at preventing these processes through immunological mechanisms.

Evidently, polyamines have an active role in normal and pathological processes, with their highest levels occurring in tissues with increased metabolic activity. Furthermore, their presence in buccodental fluids has now been definitely established, and both physiological and biochemical processes are known to be partially regulated by these molecules.

Electromyographic records from the temporal and masseter muscles of 19 edentulous patients were made, before and 30 days after wearing complete dentures. The purpose of this study was to determine the electromyographic changes: The amplitude of electromyographic records from de temporal muscles decreased, while those from the masseter muscles increased. These results suggest that the use of complete denture provokes electromyographic changes by increasing the occlusal vertical dimension and, thus, periodical electromyographic records from temporal and masseter muscles could be useful for determining the time for complete denture change.

Nasopharyngeal Obstruction as a Cause of Malocclusion A review of the literature on nasopharyngeal obstruction as etiology of malocclusion. Initial sections discuss anatomy of the nasopharynx and physiology of nasal and oral respiration. The next parts review all possible causes of nasopharyngeal obstruction and its effect on the dentofacial skeleton. Special emphasis is made on the long face syndrome. Finally, the different methods for evaluating obstruction through X rays are described, as well as all possibilities for treatment, including the interrelation of several specialties and the role of the orthodontist.

A correlation between clinical and X-ray findings with histopathology in teeth diagnosed as necrotic 30 permanent human teeth with a deep carious lesion associated with a periapical radiolucency were studied. Results were based on the histopathologic findings, correlated with clinical and radiographic data, analyzed underlight microscope. The clinically diagnosed necrotic teeth with a periapical radiolucency were 19 (63.33%), showed remnants of vital pulp tissue under histologic observation, mainly in the medium and apical root thirds, in multi-rooted teeth. Presence of infiltrated bacteria was also observed at dentinal tubules coronally. 11 teeth (36.66%) remnants did not show any evidence of vital pulp tissue, only total necrosis was observed. This group showed the presence of bacteria infiltrated at the dentinal tubules coronally and into the root canals.

A prospective study of extra and intraoral biopsies diagnosed and processed at the School of Odontology of the Technological University of Mexico (UNITEC) in its various service units, within a two and a half year period covering from January 1986 to May 1988. Out of 12,456 patients, 73 biopsies and 7 exfoliative cytologies were performed, with 41 different lesions detected. The clinical features of the five conditions most frequently found in the study are emphasized and compared with findings reported in international literature regarding the same lesions.

Alveolar defects and bucconasal openings, often observed in patients with sequellae from multiple corrective procedures for cleft lip and palate, gain considerable importance when failing to provide adequate support for emerging lateral and canine teeth, thus producing occlusal instability in the transverse and antero-posterior plans. A study was undertaken with 30 patients with alveolopalatine clefts subjected to secondary closure with iliac bone grafting, through various surgical techniques. The techniques, ages of patients, adequate integration of graft to its new implant site and type of fissure or cleft involved more duly evaluated. Good results were attained through these techniques, and their usefulness, success and ideal age for their application are widely discussed, with a review of relevant literature.

In this communication, the second of three we report the periapical and pulpal response against electric stimulation and pulpal exposure, after 20 weeks. We analyzed the quantitative cellular findings encountered in the periapical areas are presented.