The purpose of this study was to test the hypothesis that more recently developed rubber dam systems (OptraDam ® Plus and OptiDam™) are faster and easier to handle, and that the quality of isolation is not decreased. The rubber dam systems were applied in standard conditions on a dental simulator in several model clinical situations. The time of preparation, application and removal were measured and the quality of isolation was evaluated. The median time of rubber dam placement was 51 s (Q1 = 38 s; Q3 = 79 s). The shortest median time of application was with OptiDam™ (42 s), followed by a conventional rubber dam (53 s), and finally the longest was with OptraDam® Plus (58 s). The median volume of fluid remaining in the isolated space after 5 minutes was 9.5 mL (Q1 = 8 mL; Q3 = 10 mL). The largest median volume of remaining water was with OptiDam™ (10 mL), followed by a conventional rubber dam (9.5 mL) and the least with OptraDam® Plus (8.5 mL). The afore-stated hypothesis about the advantages of modern rubber dam isolation systems was accepted for OptiDam™, but rejected for OptraDam® Plus. The results could contribute to decision-making concerning the choice of rubber dam system. and Martin Kapitán, Zdeňka Šustová, Romana Ivančaková, Jakub Suchánek
The aim of this study was to compare the isolation systems OptraDam® Plus and OptiDam™ with the conventional rubber dam in terms of objective and subjective parameters. The isolation systems were applied during the dental treatment of the patients. The time of preparation, placement, presence and removal were measured and the quality of isolation was evaluated. The median time of rubber dam placement was 76 s (Q1=62 s; Q3=111.25 s). The application time of OptraDam® Plus was significantly longer compared to the other systems (P ® plus. The results presented in this study could guide clinicians for choosing the most appropriate isolation system. and M. Kapitán, T. Suchánková Kleplová, J. Suchánek
Short-winged (brachypterous) and long-winged (macropterous) adult females of Pyrrhocoris apterus (L.) originating from a Mediterranean population (Israel) were analyzed for their adipokinetic responses. The adipokinetic response, expressed as an increase of haemolymph lipids after injection of adipokinetic hormone from Locusta migratoria (Lom-AKH-I), was assessed in relation to age and dose of the hormone. We demonstrate in this study that the adipokinetic responses induced by bug's corpora cardiaca extract and Lom-AKH-I were dose-dependent for both brachypterous and macropterous females. Significant differences between the morphs were recorded for doses >= 0.25 corpora cardiaca equivalent (P < 0.01) and doses >= 0.25 pmol Lom-AKH-I (P < 0.05). The haemolymph lipid elevations induced in both morphs by 2 pmols Lom-AKH-I are comparable with that induced by crude extract of one pair of the bug's own corpora cardiaca. The age-dependent test showed much higher adipokinetic responses (P < 0.01) in macropterous females (>= 5 days old) than in the brachypterous females of the same age, when treated with 2 pmols Lom-AKH-I. Starting from day 7, the concentration of haemolymph lipids was also considerably higher (2.5-5 times) in macropterous females than in the brachypterous ones. The obtained data indicate that difference in mobilization of lipids between brachypterous and macropterous females is a geographically independent feature and represents a true wing morph characteristic of P. apterus., Dalibor Kodrík, Radomír Socha, and Lit
BACKGROUND: Radio frequency (RF) and chemical peels have been used for nonablative skin rejuvenation. Both of these cause collagen remodeling in the dermis and neo-collagen formation resulting in facial rejuvenation. There is limited literature on the evaluation of collagen remodeling by objective methods. OBJECTIVE: To compare the benefits of monopolar radiofrequency and glycolic acid peels in facial rejuvenation with regards to histopathology and Ultrabiomicroscopic sonography (UBM). METHODOLOGY: In this study, forty patients with mild to moderate photoaging received four treatments with 3 weeks interval of monopolar radiofrequency on one side of face and glycolic acid peels in increasing concentrations (NeostrataR) on the other side. Pre and post treatment, 2 mm biopsies were taken from both preauricular areas and Ultrasonography using a 35 MHz probe was done from outer canthus of eye and nasolabial folds from both sides of face. A blinded assessment was done to measure the increase in the grenz zone and dermal thickness. RESULTS: In 35/40 patients there was a significant increase in the grenz zone on histopathology and decrease in subepidermal low-echogenic band (SLEB) on UBM of the nasolabial folds on both sides of the face (p < 0.05). CONCLUSION: Radiofrequency and chemical peels showed equal efficacy in the treatment of facial rejuvenation. and D. V. Wakade, C. S. Nayak, K. D. Bhatt
Hereditární hemoragická teleangiektázie neboli morbus Rendu‑Osler‑Weber je fibrovaskulární dysplazie s autozomálně dominantní dědičností charakteristická přítomností teleangiektázií a arteriovenózních malformací kůže, sliznic a vnitřních orgánů. Plicní arteriovenózní malformace jako zdroj septických embolů mohou zapříčinit vznik mozkového abscesu, který tak bývá prvním a často jediným projevem heriditární hemoragické teleangiektázie. V práci jsou prezentovány tři kazuistiky pacientů trpících touto chorobou, kde prvním a závažným příznakem byl vzniklý mozkový absces. Protože se jedná o relativně vzácné onemocnění, nebývá vždy zvažováno v rámci diferenciální diagnostiky a tím pádem ani diagnostikováno. U každého pacienta s mozkovým abscesem je nezbytné na toto onemocnění pomýšlet a v případě podezření je nutné jej řádně vyšetřit. Při verifikované plicní arteriovenózní malformaci je třeba ji ošetřit a zabránit tak vzniku recidivujících mozkových abscesů. Péče o tyto pacienty je komplexní a multioborová., Hereditary hemorrhagic telangiectasia or Rendu‑Osler‑Weber disease is an autosomal‑dominant disorder that results in fibrovascular dysplasia and is characterized by telangiectases and arteriovenous malformation of the skin, mucosa and viscera. Pulmonary arteriovenous malformations as a source of septic emboli may give rise to brain abscess that so often is the first and only clinical manifestation of hereditary hemorrhagic telangiectasia. Three cases of patients suffering from this disease with brain abscess as the first and serious symptom are presented. Since this is a relatively rare disease, it is not always considered in the differential diagnosis and thus not diagnosed. This disease has to be considered in patients with brain abscess and, in case of a suspicion, it must be properly examined. When pulmonary arteriovenous malformation is verified, it has to be treated in order to prevent recurrent brain abscesses. Care of these patients should be comprehensive and multidisciplinary. Key words: hereditary hemorrhagic telangiectasia – Rendu-Osler-Weber disease – brain abscess – arteriovenous malformation – epistaxis – endoglin The authors declare they have no potential conflicts of interest concerning drugs, products, or services used in the study. The Editorial Board declares that the manuscript met the ICMJE “uniform requirements” for biomedical papers., and G. Hanoun, V. Vybíhal, M. Sova, J. Boudný, T. Svoboda, M. Smrčka