It's been studied "in vitro" the influence of the "Smear Layer" on the cement adhesión of the glass ionomer to the dentin. Using phosphoric acid at 37% and poliacrylic in the dentin during short periods of time, the adhesion between the cement and the dentin is improved because the Smear Layer is removed totally in the case of phosphoric acid and partially in the case of polyacrylic acid.
We introduce a study about 179 cases of Pilomatrixioma, registered in the archives from General Hospital "Vall d'Hebrón" of Barcelona between 1972-1988. Tumour of pediatric presentation, about 502 of cases have been observed in young people under 20 years, being both sexes almost equally affected percentually. About 75% of cases appear a a a single tumour smaller than 15 mm of diameter. Multiple presentation is observed only in the 2.8 of cases. A bit more than the 50% of cases are located in the head and the neck, usually in the preauricular region. Next follow upper extremities (27%), lower extremities (11%), and the rest of the body (6.7%). Recidivation appear only in the 0.55% of cases.
We review the antiplaque effectiveness of distinct chemical products. We considered two types, depends on the "in vitro" or "in vivo" demonstrable effect.
Nowadays we have a whole of drugs, Calcium antagonists (AC), like Verapamil (VE), Nifedipine (NI), Diltiazem (DI), used in cardiovascular therapy. One of them, Nifedipine, has several side effects, out of which is gingival overgrowth. In the present article we present four cases, in which have been analyzed this effect and its resolution in one of them, after drug suppression and patient's hygienic habits correction.
The purpose of this paper is to discuss some current concepts of maloclusion and TMJ Syndrome by reviewing the most significative literature. This analysis the great differences between well-knowing authors about very important subjects in occlusion, as the condylar position in centric relation and in TMJ Syndrome, or what kind of malocclusion (morphologic and functional, skeletal or dental) was the cause of TMJ Syndrome. The theory of emotional stress would be useful to explain some of the discrepancies, by reducing the occlusal disharmony to predisposal factors depending on the personal adaptation to stress.
Is made a remember for the two biological elements which audit on the root physiological formation: the dental pulp and the Hertwig's epithelial root sheath. Is discussed like on the practice clinic, we can find undamaged both elements, or we have only with the Hertwig's epithelial root sheath. We indicate a treatment when we have a vioble dental pulp, like different treatment if only we have the Hertwig's epithelial sheath. Is remembered rules which help to keep the health of the periodontal tissues, preventing to the same initiation and preventing too the immunologic reactions.
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