Odontologia chilena最新文献

The comparison of caries prevalence and of strategies applied for health promotion and caries prevention among industrialized countries, shows that systemic fluoride is the most effective method to reduce this disease. The analysis of the improvement in oral health services delivery, done through the study of the New Zealand Oral Health Care System during the period 1921-1982, confirms that this strategy, by itself, cannot produce a significative improvement in the oral health status. The review of the strategies applied to reduce periodontal disease, leads to the conclusion that the control of this disease will only be possible through health education programs with a public health approach. The study of the factors that have contributed to the decrease in oral health status in developing countries, shows that the increase in stimulous towards sugar consumption has had a great influence in the change of eating habits thus, in caries incidence. The oral health beliefs and values of the population, exercise a negative influence in the individuals health seeking behaviours. The conclusion is that it is not possible to revert the oral health status trends in developing countries, unless health promotion and disease prevention policies are implemented at government level.

A 26 year-old female was seeking treatment for a painless ulcerated lesion of the tongue developing 30 days before. No history of a sef biting in that area was told by the patient. Following a provisional diagnosis of tuberculous ulcer or a neoplasm, under local anesthesia, a segment of the lesion was excised and sent to histological diagnosis, which confirmed the existence of a tuberculous ulcer. Additionally, a chest roentgenogram disclosed the presence of an undiagnosed pulmonar tuberculous lesion. The patient underwent a successful treatment with rifampicin, isoniazide and pirazinamide, and two month after the initial diagnosis the oral lesion was almost absent, although the pulmonar lesion was still detected on the roentgenogram. Finally, a total disappearance of the pulmonar lesion was detected six month following drug treatment.

The adhesive resistance of the bonding between a same light-cured composite, was determined "in vitro" by a tensile stress test. The bondings were performed among two parts of same composite with and without resin-bonding agent. The variable used was the application or not of the resin bonding agent for enamel and dentin, over the adhering surface of the matrix, obtaining resistance values of 28-30%, compared with the cohesive resistance of the material used, when the resin bonding was utilized. On the other hand, using a composite without the resin bonding agent, the tensile stress resistance values decreased below 10% of the total cohesive resistance informed by the manufacturer.

In the present paper we report our clinical experience with hydrostatic sialography, a modification of the conventional technique, which consist in introducing the contrast liquid into the salivary glands by means of gravity pressure. Additionally, a comparative study was done between both techniques. Our results are in accordance with those previously reported in the current literature i.e. the hydrostatic sialography is superior to the current technique, since does not allow the overinjection of the contrast liquid in the salivary gland and also is better tolerated by the patient. However, new experiences with the technique are needed, largely in patients with different diseases of the salivary glands in order to establish the usefulness of the latter in daily practice.

A bilateral case of transposition of canines and lateral incisives developing in the lower jaw of an eleven year-old age is reported in this paper. The very low occurrence of the condition is emphasized by the author and usually the lesion is diagnosed late, once the disturbance is already established. In the case herewith reported, the advanced eruption of the involved teeth determined the need for orthodontic treatment.

The efficacy of drug treatment on 119 patients with trigeminal neuralgia is reported in the present paper. Among them, 112 were idiopathic trigeminal neuralgias while only 7 cases were secondary trigeminal neuralgias. All patients were treated with drugs at different stages of the evolution of the neuralgia. Carbamazepine was used on all patients. 12.6% was treated with imipramine (tricyclic antidepressive drug), 4 patients received amphetamines due to psychiatric emergencies, 4 patients were treated with phenytoin before this study and three patients received baclofen during short periods of follow-up. Drug therapy was the only treatment method in 51 patients. In 43 patients it was combined with peripheral surgical treatments including injections of alcohol and neurectomies. 16.8% of the patients were treated with drugs and acupuncture; the results of this experience will be reported in a future paper. Only 4.2% (5 patients) underwent neurosurgical treatment: one ponto cerebellar angle tumour, one electrocoagulation of the gasserian ganglion through the stereotaxic method and three cases of microvascular decompression of the trigeminal root. Clinical, pharmacological and neurophysiological aspects of trigeminal neuralgia pharmacotherapy are discussed.

The fluoride concentration on their respective infusions was determined in the twelve most popular brand of tea which can be obtained in Valparaiso, Chile. Fluoride concentration was measured 5, 45 and 180 minutes after tea preparation, by using an specific fluoride electrode. The amount of ingestion of tea in children was estimated by means of a survey on 303 children from a sample of 7,690 boys and girls living in a fluoridated area. The data revealed a large variability in fluoride concentration depending on the brand of tea. Mean fluoride concentration was 2.36 mg F/l. at the five first minutes. Sixty eight per cent of children drinking tea as usual beverage, therefore it was estimated that about 22.1% of this sample have risk of dental fluorosis.

Mouse molars tooth buds on the bell stage were cultured, to investigate the best medium for their maintainance and their eventual clinical use. Tooth germs were cultivated during 3 to 8 days in three different medium: Eagle basal medium (liquid medium), agar-solidified medium and chick chorioallantoic membrane. The grafts were examined by light microscopy. Mesenchymal and atypical cells were counted in experimental and control groups. Our results showed that liquid medium was the best for 3-days buds cultures. Chorioallantoic membrane and agar-solidified medium showed better results for the maintainance of bud cultures for 8-day test. The objective of this study is to maintain in vitro tooth buds cultures for future transplants. This will also provide for the possibility of a more in-depth study of normal odontogenesis.

A review on fluoride containing amalgam is reported in this paper. The inhibitory effects of fluoride on dental caries are well known for many years. Thus, the incorporation of fluoride to an amalgam restoration prevents the occurrence of marginal caries. Other physical properties of fluoride amalgams such as compressive strength, dimensional changes, creep and corrosion are also reviewed in this paper.