Leading dental journals availability through academic network of Serbia

In the last century a great progress was noted in all scientific disciplines. With the increasing number of scientific research, researchers and investment, the number of publications has grown exponentially. Besides, the development of information technologies and the emergence of the Internet, communication between scientists as well as the traditional roles assigned to the institutions responsible for information processing and provision has been changed. Due to the rapidly increasing subscription rates, libraries, although the primary participants in the scholarly communication process, lose their ability to meet user information needs. In order to overcome commercialization of scholarly publishing, libraries intensify use of different electronic resources, coordinate acquisition policy and form consortia. In November 2001, leading research libraries in Serbia launched an initiative to form the Consortium for Coordinated Acquisition of Serbian Libraries (KoBSON). Subscribed services, funded by the Ministry of Science and Technological Development of Serbia, currently include over 35,000 scientific journals, about 40,000 books and several citation databases. In the field of Dentistry, Oral Surgery and Medicine, 73.4% of total number of the most relevant dental journals is available in electronic form to Serbian academic community. This article presents a comprehensive overview of basic information about available journals: impact factor, productivity, publication continuity and frequency, language, services that they are available through, size of archives and existing formats. At present Serbian academic institutions have access to more than two thirds of the world’s most relevant dental journals, which justifies the Consortium founders’ initial idea of wide accessibility of scientific information and requires greater involvement of librarians in introducing available services to researchers in order to ensure their full utilization

Bibliometrijska analiza radova objavljenih u Stomatološkom glasniku Srbije u periodu 2002-2009. godine

Introduction. Serbian Dental Journal (SDJ) is a major source of formal communication for dentists in this region. The purpose of this bibliometric study was to examine articles published in SDJ in period 2002-2009, in reference to journal productivity and nature of authorships, citation patterns, most frequently cited scientific journals and the role of self-citations. Material and Methods. Bibliographic data, as well as metadata for all articles were taken from the Serbian national citation index SCIndeks. Bibliometric analysis of source articles included the number and type of article, author characteristics and cited literature. For each citation the following data was recorded: author(s), article title, journal title, monographic title, publication type, publication year and language. Results. In this period 193 articles were published and most of them were original research articles. In this period a total of 314 national and international authors cooperated, responsible for 538 authorships. The mean number of authors per article was 2.8. Most cited items in terms of publication type were journal articles (83.5 %), while the most frequently cited journals were just those most relevant in the field of dentistry. Results also indicate that the age of the cited literature is below the norm for medical literature. Conclusion. Obtained numerical indicators do not differ significantly when compared to other scientific and professional journals. However, it can be concluded that it is necessary to increase journal productivity and self-citation rate, as well as citation of current literature, up to five years old. This analysis allows evaluating patterns of scientific communication among dentists in this region, as well as journal's current management strategies in order to define useful future directions for the inclusion into the international system of scientific information exchange.Uvod. Časopis Stomatološki glasnik Srbije (SGS) je glavni izvor formalne komunikacije stomatologa s ovih prostora. Cilj ovog rada je bio da se primenom bibliometrijskih pokazatelja provere osobenosti radova objavljenih u SGS, produktivnost časopisa, priroda autorstava, obrasci citiranja, najčešće citirani naučni časopisi i uloga autocitata u periodu 2002-2009. godine. Metode rada. Podaci o objavljenim radovima i metapodaci preuzeti su iz Srpskog citatnog indeksa (SCIndeks). Bibliometrijska analiza izvornih članaka uključila je broj i tip objavljenih radova, podatke o autorima i citiranu literaturu. Za svaki citat zabeleženi su sledeći podaci: autor(i), naslov rada, časopisa i monografske publikacije, tip dokumenta, godina objavljivanja i jezik. Rezultati. U posmatranom periodu u SGS su objavljena 193 članka, od kojih većinu čine originalni naučni radovi. Kooperiralo je ukupno 314 autora iz zemlje i inostranstva, odgovornih za 538 autorstava. Prosečan broj autora po radu bio je 2,8. Najčešće citirani tip literature su članci iz časopisa (83,5%), dok su najčešće citirani naučni časopisi upravo oni najcenjeniji na polju stomatologije uopšte. Podaci o starosti citirane literature ukazuju na citiranje koje je nešto ispod norme za medicinsku literaturu. Zaključak. Dobijeni podaci se ne razlikuju značajno od numeričkih pokazatelja za druge naučne i stručne časopise. Ipak se može zaključiti da je neophodno povećati produktivnost i autocitiranost časopisa, kao i korišćenje aktuelne literature stare do pet godina. Ova analiza omogućava valorizaciju naučne komunikacije stomatologa s ovih prostora, ali i evaluaciju aktuelne strategije vođenja ovoga časopisa, kako bi se definisale korisne smernice za uključivanje u međunarodni sistem razmene naučnih informacija

Controversies related to real protection against SARS-CoV-2 virus of the most frequently used face masks

Face masks serve to protect the respiratory system from unwanted aerosol droplets, in which various types of pathogens or pollutants are present. They are particularly important during a pandemic, like SARS-CoV-2 pandemic we are withessing. The efficiency of filtration of aerosol droplets, which contain the virus particles, is generally unsatisfactory, especially in conditions of extremely virulent environments, for the most of commercially available masks. Therefore, the challenge is to produce masks with increased filtration efficiency, in order to reduce the percentage of virus penetration through the mask. Hence, it is crucial to correctly define the possibilities and limitations of today's most commonly used epidemiological masks, in order to successfully define completely new concepts of face masks manufacturing, which would enable the most effective protection not only of medical workers but also patients, especially in areas where virus concentrations are extremely high. Also, it has been shown that, in addition to the concentrations of infectious pathogens in a given environment, the conditions in which infection with a given pathogen occurs, such as temperature and humidity within a given contaminated space, are also important

Endodontic therapy of pathological resorptions of tooth root

Pathological resorptions of a tooth root very often represent both a diagnostic and therapeutical problem. The goal of this study was, based on clinical research on a number of pathological resorptions of various types and localization in relation to time, to analyze and evaluate applied endodontic therapy. Clinical research covered 30 patients (40 root canals in total). 18 teeth (22 canal) with external and 12 (18 canal) with internal root resorptions received endodontic therapy. After standard endodontic procedure had been applied (cleaning and canal shaping) calcium hydroxide paste was used as a canal medicament for cases with internal resorptions and calcium hydroxide paste and points for cases with external resorptions. Canal opturations were done by modified technique of lateral condesation applying AH- Plus paste. The obtained results showed that in cases of internal resorption after 12 months, 11 cases were successful and only 1 failure occurred. In case of external resorption, after the same period of time, 15 cases were successful and failures occurred in 3 cases. The success of resorption treatment depends on many factors but, primarily, it depends on time and accuracy of diagnosis and properly applied treatment and root canal opturation

Lokalizacija glavnih i pomoćnih otvora na mezijalnom i distalnom korenu prvih donjih molara

Introduction. Understanding the morphology of the root canal system, and especially its apical third, represents the basic precondition for the successful treatment of diseased pulp and the apical endodontium. Aim. The aim of this study was to precisely locate the main and ancillary foramina in the mesial and distal first lower molars. Method. One hundred extracted first lower molars, originating from persons of both sexes and three different age groups, were used in the study. Results. The analysis of the sampled molars’ apical third was carried out using a binocular magnifier and a digital X-ray scanner (Trophy). The results showed that the main mesial and distal root foramina were located mostly on the distal surface. The ancillary mesial and distal root foramina were located at the lingual end, in most cases. Statistical analysis demonstrated the congruence of results achieved using the binocular magnifier and digital x-ray in 100% of cases if the main foramen is located on the very top of the mesial root (χ2 =17.23; p lt 0.001), and in 92.9% of cases if the main foramen is localised on the very top of the distal root of the first lower molar (χ2 =12.07; p lt 0.001). Conclusion. The most common localisation of the main foramina for all age categories and in both mesial and distal roots is on the distal surface of the root. The greatest number of ancillary foramina was observed in the youngest age category, while they were localised most often on the lingual side of the mesial and distal root.Uvod Poznavanje morfologije korenskog kanalskog sistema zuba, a naročito njegove apeksne trećine, predstavlja osnovni preduslov za uspešno lečenje obolele pulpe i apeksnog endodoncijuma. Cilj rada Cilj rada je bio da se odredi tačna lokalizacija glavnih i pomoćnih otvora na mezijalnom i distalnom korenu prvih donjih stalnih molara. Metod rada Ispitano je 100 ekstrahovanih prvih donjih molara osoba oba pola, podeljenih u tri starosne kategorije. Analiza apeksne trećine uzoraka je urađena pomoću binokularne lupe i digitalnog rendgenografskog aparata (Trophy). Rezultati Dobijeni rezultati su pokazali da je najčešća lokalizacija glavnih otvora na mezijalnom i distalnom korenu bila na distalnoj strani. Pomoćni otvori na mezijalnom i distalnom korenu su najčešće bili lokalizovani na lingvalnoj strani korena. Statistička analiza je pokazala podudarnost rezultata dobijenih primenom binokularne lupe i digitalne rendgenografije kod 100% ispitanih zuba ako je glavni otvor lokalizovan na samom vrhu mezijalnog korena (χ2=17,23; p lt 0,001), odnosno kod 92,9% zuba kada je glavni otvor na samom vrhu distalnog korena prvog donjeg molara (χ2=12,07; p lt 0,001). Zaključak Najčešća lokalizacija glavnih otvora i kod mezijalnog i kod distalnog korena je na distalnoj površini korena u svim starosnim kategorijama. Najveći broj pomoćnih otvora uočen je u najmlađoj starosnoj kategoriji, a najčešće su bili lokalizovani na lingvalnoj strani mezijalnog i distalnog korena

Faktori nastanka poplava na teritoriji opštine Obrenovac

Frequent floods in the area of the municipality of Obrenovac have initiated the establishing, classification and analysis of the starting factors of their genesis in this area. After the dam had been constructed on the right bank of the Sava River (in the 80’s of the 20th century) along the northern border of the municipality of Obrenovac, there were no more floods in this part of the area caused by its overflows. Recent floods have still been caused by a very frequent flooding of the River Kolubara near Poljana, even several times during the year. For that reason the factors of flooding the Kolubara River from its riverbed have been analyzed in this paper. Except the pluviometric and hydrological regime analysis as direct factors of flooding the indirect causes have also been analyzed in details, the most important of which are: the morphological characteristics of terrain, balance of deposits and anthropogenic impacts. Perceiving the causes of flooding, the conditions for analysis of undertaken measures and giving the possible solutions for their prevention have also been realized. The results of this research can be used in making the strategy for solving the existing waterpower problems of this area.Česta pojava poplava na prostoru opštine Obrenovac inicirala je utvrđivanje klasifikaciju i analizu odredišnih faktora njihove geneze na ovom prostoru. Nakon izgradnje nasipa na desnoj obali Save (80-tih godina 20. veka) duž severne granice opštine Obrenovac, nisu se više dešavala plavljenja ovog prostora njenim izlivanjima. Recentna plavljenja su i dalje uslovljena veoma čestim izlivanjima reke Kolubare kod Poljana, čak i više puta u toku godine. Iz tog razloga, u ovom radu su analizirani faktori izlivanja Kolubare iz korita. Osim analize pluviometrijskog i hidrološkog režima, kao direktnih faktora nastanka poplava, detaljno su analizirani i indirektni uzroci, od kojih su najvažniji morfološke odlike terena, bilans nanosa i antropogeni uticaji. Sagledavanjem uzroka nastanka poplava ostvareni su i uslovi za analizu preduzetih mera i iznošenje mogućih rešenja za njihovo sprečavanje. Rezultati ovog istraživanja mogu se iskoristiti pri izradi strategije rešavanja postojećih vodoprivrednih problema ovog prostora

Komparativna ispitivanja kruničnog zaptivanja metodom poprečnih preseka korena zuba

Objective: An in vitro comparison of coronal microleakage of three root canal sealers was performed using the dye leakage method. Methodology: Ninety-eight single-rooted human teeth were instrumented and randomly allocated to two groups. In the first group, root canals were treated with EDTA to remove the smear layer. The roots in both groups were obturated using laterally condensed gutta-percha and Sealapex, AH-26 or Ketac-Endo as the sealer. The teeth were suspended in 1% methylene blue dye for 6 days. The teeth were then rinsed, sectioned perpendicular to the long axis and evaluated for coronal dye penetration. Results: In general, Ketac-Endo root canal sealer showed greater dye penetration than Sealapex and AH-26. A statistically significant difference in the coronal penetration of the dye was found in the group with intact smear layer. Conclusion: Highly significant differences between AH-26 and Ketac-Endo (p lt 0.001) and Sealapex and Ketac Endo (p lt 0.001) were found.Cilj: Cilj ovog rada je bio da se ispita kvalitet kruničnog zaptivanja kod zuba opturisanih lateralnom kompakcijom primenom metode poprečnih preseka korena zuba. Materijal i metod: U istraživanjima je korišćeno 98 ekstrahovanih jednokorenih zuba, koji su endodontski obrađeni i podeljeni u dve eksperimentalne grupe. Svi kanali su obrađeni STEP-BACK tehnikom preparacije kanala korena uz primenu 2.5% rastvora NaOCl. Uzorci prve grupe su nakon instrumentacije tretirani rastvorom EDTA radi uklanjanja razmaznog sloja. Svi kanali iz obe grupe su opturisani tehnikom lateralne kompakcije primenom pasti SEALAPEX, AH-26 I KETAC-ENDO. Zubi su nakon opturacije potapani u 1% rastvor metilen-plavila tokom 6 dana i potom serijski presecani poprečno na različitoj udaljenosti od gleđno - cementne granice radi evaluacije kruničnog mikropropuštanja. Svaki poprečni presek je posmatran pod mikroskopom na uveličanju 50x. Rezultati: Dobijeni rezultati su generalno pokazali da je u uzoraka opturisanih pastom KETAC-ENDO uočen veći prodor boje nego kod SEALAPEX-a i AH-26. Statistički značajne razlike uočene su u grupi gde razmazni sloj nije uklonjen. Razlika je bila visoko značajna i između uzoraka zuba opturisanih pastom KETAC-ENDO i AH-26 (p lt .001) i između KETAC-ENDO i SEALAPEXa (p lt .001). Zaključak: Rezultati ove studije ukazuju da je bolje krunično zaptivanje ostvareno posle primene pasti AH-26 i SEALAPEX nego posle primene KETAC-ENDO cementa