Antibacterial and Bonding Properties of Universal Adhesive Dental Polymers Doped with Pyrogallol

This study investigated the antibacterial activity, bond strength to dentin (SBS), and ultra-morphology of the polymer–dentin interface of experimental adhesive systems doped with pyrogallol (PY), which is a ubiquitous phenolic moiety that is present in flavonoids and polyphenols. A universal adhesive containing 4-META and 10-MDP was used in this study. PY behaves as an antioxidant and anti-cancerogenic agent and it was incorporated into the adhesive at different concentrations (0.5 and 1 wt.%). The antibacterial activity and SBS were analyzed and the results were statistically analyzed. The ultra-morphology of the polymer–dentin interface was assessed using scanning electron microscopy (SEM). At 24 h, a lower antibacterial activity was observed for the control adhesive compared to those with 0.5% and 1% PY. No difference was seen in SBS between the three groups at 24 h. After 6 months, the SBS of the 0.5% PY adhesive was significantly lower than the other tested adhesives. The specimens created with 1% PY adhesive presented a higher bond strength at six months compared with that found at 24 h. No morphological differences were found at the polymer–dentin interfaces of the tested adhesives. Pyrogallol may be incorporated into modern universal adhesive systems to preserve the polymer–dentin bonding interface and confer a certain degree of antibacterial activity.</jats:p

La revascularisation chirurgicale des lésions occlusives de l’artère sous-clavière

Les lésions occlusives de l’artère sous-clavière sont fréquentes et souvent peu  symptomatiques. L’objectif de notre étude rétrospective, portant sur 13 patients opérés pour une lésion occlusive de l’artère sous-clavière entre janvier 1989 et mai 2013, était de dégager les principales étiologies des lésions occlusives de l’artère sous-clavière, de détailler la stratégie diagnostique et thérapeutique, et d’évaluer nos résultats en les comparant à ceux de la littérature. L’étiologie retrouvée était l’athérosclérose dans la majorité des cas. Les troubles ischémiques du membre supérieur étaient les principales indications de revascularisation. Tous les patients ont eu une revascularisation chirurgicale, essentiellement par un pontage  carotidoaxillaire. Les suites de l’intervention ont été marquées par la récupération des pouls du membre supérieur chez tous les patients.Mots-clés : Artère sous-clavière, vol vertébrosous-clavier, chirurgie, transposition, pontage, angioplastie percutanée. Occlusive lesions of the subclavian artery are common and are often minimally  symptomatic. The aim of our retrospective study of about 13 patients who underwent a surgery for occlusive lesion of the subclavianartey, between january  1989 and may 2013, was to identify the main etiologies of these lesions, describe the diagnostic and therapeutic strategy, evaluate our results and compare them with the literature studies. The most common etiology was atherosclerosis.  Ischemic disorders of the upper limb were the main indications for correction of these lesions. All patients underwent surgery mainly by a carotid-axillary artery  bypass. We had no complications in surgery follow-up.Keys words: Subclavian artery, subclavian steal syndrome, surgery, transposition, bypass, percutaneous angioplasty