[Factors involved in microbial colonization of acrylic resins]. / Factori implicati în colonizarea microbiana a rasinilor acrilice.

UNLABELLED: The objective of this study was to evaluate the effect of polishing technique and the polymerisation type on the microbial colonization of acrylic resins. MATERIAL AND METHODS: The studied resins were: Castapress/Vertex, Prothyl Hot/Zermack, Duracryl Plus/Spofa Dental, Vertex-Soft/Vertex, Superacryl Plus/Spofa Dental. Ten specimens, two for every resin, presenting dimensions of 50/25/2 cm were done. One sample of each resin was polished with extrahard tungsten carbide burs, the other sample being polished with extrahard extrafine and diamond burs. The final polishing was done using a conventional method: pumice, water and lathe bristle brush for 90 seconds, 1500 rpm and soft leather polishing wheel for 90 seconds, 3000 rpm. One sample of Duracryl Plus was glazed after polishing with Glaze/Bosworth. Vertex Soft specimens were not polished because it is a resilient material. The samples were immersed in human saliva for 24 hours and after that were colored with May Grunwald Giemsa (MGG). The total germs number (TGN) was determined by Buiuc method. RESULTS: The lowest value of the microbial colonization was related to the heat-curing resins treated by conventional polishing combined with glazing techniques. CONCLUSIONS: The results noticed that the type of acrylic resin (autopolymerizing and heat-cured) and the polishing techniques have a significant influence on the microbial colonization. Specimens of self curing resin had a higher porosity than heat curing resin after the same surface treatment, generating a higher TGN.

[Surface characteristics of the acrylic resins according to the polishing methods]. / Studiu privind starea de suprafata a rasinilor acrilice în raport cu metodele de prelucrare mecanica.

AIM: The objective of this study was to evaluate the effect of the polishing technique and glazing on the porosity of the dental resins. MATERIAL AND METHODS: The studied resins were: Castapress/Vertex, Prothyl Hot/Zermack, Rapid Simplified/Vertex, Duracryl Plus/Spofa Dental, Vertex-Soft/Vertex, Superacryl Plus/Spofa Dental. Thirty specimens, five for every resin, of 50/25/2 cm in size were done. One surface of each sample was polished with extrahard tungsten carbide burs, the other surface being polished with extrahard extrafine and diamond burs. The final polishing was done using a conventional method: pumice, water and lathe bristle brush for 90 seconds, 1500 rpm and soft leather polishing wheel for 90 seconds, 3000 rpm. Twenty surfaces were glazed after polishing with Glaze/Bosworth. Vertex Soft specimens were not polished because this is a resilient material. Surface porosity of the acrylic resin specimens was measured by optical microscopy. RESULTS: The lowest porosity was obtained by conventional polishing combined with glazing techniques. No differences between glazed and non/glazed self-curing resin specimens were noticed, but there were differences between self-curing and heat-curing resins. CONCLUSIONS: Conventional lathe polishing method is an effective and reliable technique for polishing dental resins. Specimens of self-curing resin had a higher porosity than heat curing resin following the same surface treatment. Higher surface smoothness was obtained by conventional lathe polishing completed by glazing.

Researches of the nitrite/nitrate presence and other chemical compounds in some water sources from rural area of Neamt county.

UNLABELLED: Water is one of the main dietary components and his quality may be influenced the health status of the population. MATERIAL AND METHODS: We investigated the water quality (by ten chemical parameters) delivered to the rural population (Neamt district), from the public water supply systems (n=10) with ground water sources and 60 well waters in same area. For determinations of the investigated chemical compounds, spectrophotometric, complexonometric and volumetric methods were performed. Statistical analysis was applied to analyze of data. RESULTS: The regression analysis between nitrate-organic matters, nitrite-chlorides, nitrate-total hardness shows strong negative and positive relationships as r = 0.7631, r = 0.7252, r = -0.777, and very low correlations between other chemical parameters. CONCLUSIONS: The results revealed that chemical parameters ranged between the admissible limits for drinking water.

[Comorbidities in psoriatic patients of Iasi Dermatological Clinic from 2004-2008]. / Comorbiditati la pacientii cu psoriazis internati in Clinica dermatologica Iasi in perioada 2004-2008.

UNLABELLED: Psoriasis is a chronic inflammatory disease of the skin, relatively frequent in the population. Recent studies have shown that psoriasis can have a great impact on quality of life, even in patients with limited disease. Although the cause of this disease remains unknown, research suggests that psoriasis is a complex disease caused by the interaction of many genes, the immune system and environmental factors. In principle, any disease can coexist with psoriasis. MATERIAL AND METHOD: We conducted a retrospectiv study based on observation files of hospitalized patients with psoriasis admitted in the Dermatology Clinic Iasi during January 2004 - December 2008. RESULTS: Current data suggests that smoking and obesity increase the risk of developing psoriasis. Psoriasis may be an independent risk factor for developing diabetes, atherosclerosis and myocardial infarction. Therefore the patients with psoriasis die 3-4 years earlier than the rest of the population. Patients should be advised to stop excessive alcohol consumption and smoking. CONCLUSION: Further studies are needed to clarify the link between severity of skin lesions, treatments and the evolution of associated diseases.

Aesthetic goals in porcelain fused to metal prosthetic appliances.

UNLABELLED: The ultimate goal for ceramic fused to metal restoration is the creation of a perfect aesthetic integration of the restoration with healthy tissues. MATERIAL AND METHOD: The study included a group of twenty-one patients. Sixteen of them were partial edentulous patients and five presented dental lesions or chromatic modifications of the dental tissues. The treatment plan consisted of metal-ceramic crowns and bridges. The ceramic system used was Vintage Halo (Shofu). RESULTS: According to the patient's age, topography of the missing teeth or colour modification, we surveyed the aesthetic rehabilitation, creating the specific morphological elements, in order to realise an individual natural aspect with a similar optical behaviour as the dental enamel. CONCLUSIONS: The current popularity of metal-ceramic restorations is primarily related to their predictable strength and reasonable aesthetics. The main parameters that are responsible for a high-quality result are represented by: non-invasive and reversible procedures, conservative preparations, individual function offered by an individualized reconstruction, gnathology-based concepts into the occlusal rehabilitation, biocompatible materials, longevity of the reconstruction and comfort for the patient.