The Effect of New Generation Self-etch Adhesives on the Quality of Composite Restorations

Samojetkajući dentin adhezivi uvedeni su u praksu kako bi se uklonilo nanocurenje, izbjegla uporaba vlaže tehnike, reducirao broj koraka u aplikaciji adheziva. Na tržištu trenutačno postoje samojetkajući adhezivi koji se apliciraju u jednom ili dva koraka. Cilj je ove studije da usporedi utjecaj 2 samojetkajuća adheziva nove generacije: Prompt L Pop (samojetkajući primer-bond agent, sve u jednom koraku) i AdheSE (samojetkajući primer-bonding agentdva koraka) na kakvoću kompozitnih ispuna treće klase. kompozitni aterijal upotrijebljen u ovoj studiji bio je Tetric Ceram Ivoclar Vivadent. Uzorak u ovoj studiji čini 60 kompozitnih ispuna treće klase, rađenih na djeci u dobi od 12-16 g. Kod 30 ispuna uporabljen je adheziv Prompt L Pop proizvođača #M ESPE, a kod drugih 30 ispuna kao adheziv uporabljen je AdheSE proizvođača Ivoclar Vivadent. Za procijenu kompozitnih restauracija primijenjeni su USPHS kriteriji (A-idealno, B-prihvatljivo, Cneprihvatljivo) za sljedeće parametre: postoperativna osjetljivost, boja ispuna, marginalna diskoloracija, marginalna adaptacija, anatomaski oblik ispuna i postojanje karijesa. Vrjednovanje je provedeno nakon tri i šest mjeseci. Rezultati nisu pokazali statistički znatnu razliku u kakvoći ispuna, bez obzira na vrstu upotrijebljenog adheziva.Self-etch adhesives are introduced in clinical practice with the aim of eliminating nanoleakage, avoiding of wetbond technique and reducing the numerous bonding steps. There are two kinds of self-etch adhesives available on the market today: those that are applied in one and in two steps. The aim of this study was to compare the effect of two self-etch adhesives: Prompt L Pop (Self-etch Primer/Bonding agent-one step) and AdheSE (Self-etch Primer-Bonding agent-two steps) an the quality of Class III composite fillings. Composite filling material used in this study was Tetric Ceram Ivoclar Vivadent. The sample in this study comprises 60 Class III composite fillings, placed in children aged 12-16 years. Out of these, in 30 cases Prompt L Pop 3M ESPE was applied, and in the other 30 fillings, AdheSE Ivoclar Vivadent was used. For the evaluation of composite fillings USPHS criteria were used (A ideal; B-acceptable; C-unacceptable) for following paramaters: postoperative sensitivity, color match, marginal discoloration, marginal adaptation, anatomic form and recurrent caries. The evaluations were performed after 3 and 6 months. Results showed no statistical difference in clinical appearance of fillings irrespective of which adhesive was used

Confocal Laser Scanning Microscopy Investigation of the Penetration of Adhesives and Sealant Resins Into Fissures

Proces zalijevanja fisura u idealnim bi uvijetima trebao potpuno spriječiti prodor mokroarganizama u duboke jamice i fisure. Utvrđeno je da zaljevači sada dostupni na tržištu ne prodiru uvijek i potpuno u duboke i srednje duboke fisure tipa I (oblika pukotine) ili IK tipa (oblika ampula). S obzirom na nisku viskoznost i izvrsno vlaženje postojećih dentin adheziva, oni se upotrebljavaju u kombinaciji sa zaljevačima fisura da bi se poboljšala kvaliteta veze između zaljevača i cakline. Svrha ove ekspeimentalne studije bila je ispitati postoji li mogućnost poboljšanja penetracije zaljevača u fisure humanih molara, u kombinaciji s dentin adhezivima. Istraživanje je provedeno na 20 izvađenih intaktnih ljudskih molara i premolara. Čiščenje je učinjeno zračnim polirajućim uređajem 60 sekundi. Eksperimentalna grupa od 10 uzoraka tretirana je s dentin adhezivom Prime&Bond NT i zaljevačem fisura Dyrect Seal. Kontrolna skupina (10 zuba također) tretirana je samo sa zaljevačem fisura Dyrect seal. Tretirani uzorci rezani su na režnjeve debljine 700 mikrometara (ukupno 53 komada), usporedno sa zubnom osovinom. Vrjednovanje je provedeno s konfokalnim laserskim mikroskopom. Rezultati eksperimentalne skupine pokazuju da je 12 dubokih fisura potpuno punjeno, 9 nije bilo punjeno potpuno, 9 je bilo punjeno s postojanjem mjehurića zraka, a jedna široka fisura bila je punjena potpuno. Rezultati kontrolne skupine pokazuju da je 6 dubokih fisura potpuno punjeno, 19 nije punjeno, 5 je punjeno s postojanjem mjehurića zraka i 6 širokih fisura je punjeno potpuno. Uporabljen je Hi-kvadrat test za statističku raščlambu sa stupnjem korekcije p = 0,0465. To znači da postoji znatna razlika između kontrolne i eksperimentalne skupine. Uporaba dentin adheziva u metodi zalijevanja fisura ima određene prednosti u usporedbi s standardnom metodom zalijevanja fisura.The process of fissure sealing should ideally avoid the delivery of any microorganism subtrate into the depths of plaque-retentive pits and fissures. Up to now, available sealing materials have been found to not always completely penetrate to the bottom of deep and medium deep fissures of type I (slit-like) or type IK (ampoule-like). Due to the low viscosity and exellent wetting properties of current dentin adhesive systems, they were used in combination with sealant materials in order to improve the filling of fissures. The purpose of this experimental study was to evaluate whether penetration by filled sealing materialsinto fissures of human molars could be improved by combining them with enamel-dentin adhesives. The investigation was carried out on 20 extracted clinically caries-free, human premolars and molars. Cleaning was carried out with an air polishing device for 60 seconds. In the test groups, each containing ten teeth, a two material combination of an enamel-dentin adhesive (Prime&Bond NT) and a filled sealing resin was used to seal the fissures (Dyrect SEal). In the control groups (ten teeth) only the filled sealing material without an initial adhesive was applied. The scaled teeth were sectioned into slices of 700 micrometers in thickness (totla of 53 slices), parallel to the tooth axis. Evaluation under CLSM was carred out. In the experimental group, 12 deep fissures were completely filled, 9 were not filled, 9 were filled with bubbles of air, 1 wide fissure was filled. In the control group, 6 deep fissures were filled, 19 were not filled, 5 were filled with the bubbles of air and 6 wide fisures were filled. We used Chi-sqouare test as a statistic method and later Yatcs correction p = 0.0465. Differences between the control and experimental group are significant. Use of enamel-dentin-adhesive system in fissure sealing have some advantages

Abdominal aortic aneurysm volume and relative intraluminal thrombus volume might be auxiliary predictors of rupture—an observational cross-sectional study

Objectives: The study aimed to identify differences and compare anatomical and biomechanical features between elective and ruptured abdominal aortic aneurysms (AAAs). Methods: Data (clinical, anatomical, and biomechanical) of 98 patients with AAA, 75 (76.53%) asymptomatic (Group aAAA) and 23 (23.46%) ruptured AAA (Group rAAA), were prospectively collected and analyzed. Anatomical, morphological, and biomechanical imaging markers like peak wall stress (PWS) and rupture risk equivalent diameter (RRED), comorbid conditions, and demographics were compared between the groups. Biomechanical features were assessed by analysis of Digital Imaging and Communication in Medicine images by A4clinics (Vascops), and anatomical features were assessed by 3Surgery (Trimensio). Binary and multiple logistic regression analysis were used and adjusted for confounders. Accuracy was assessed using receiving operative characteristic (ROC) curve analysis. Results: In a multivariable model, including gender and age as confounder variables, maximal aneurysm diameter [MAD, odds ratio (OR) = 1.063], relative intraluminal thrombus (rILT, OR = 1.039), and total aneurysm volume (TAV, OR = 1.006) continued to be significant predictors of AAA rupture with PWS (OR = 1.010) and RRED (OR = 1.031). Area under the ROC curve values and correct classification (cc) for the same parameters and the model that combines MAD, TAV, and rILT were measured: MAD (0.790, cc = 75%), PWS (0.713, cc = 73%), RRED (0.717, cc = 55%), TAV (0.756, cc = 79%), rILT (0.656, cc = 60%), and MAD + TAV + rILT (0.797, cc = 82%). Conclusion: Based on our results, in addition to MAD, other important predictors of rupture that might be used during aneurysm surveillance are TAV and rILT. Biomechanical parameters (PWS, RRED) as valuable predictors should be assessed in prospective clinical trials. Similar studies on AAA smaller than 55 mm in diameter, even difficult to organize, would be of even greater clinical value. 2023 Koncar, Nikolic, Milosevic, Bogavac-Stanojevic, Ilic, Dragas, Sladojevic, Markovic, Vujcic, Filipovic and Davidovic

The politics of performance: transnationalism and its limits in former Yugoslav popular music, 1999–2004

This paper examines transnational relations between the Yugoslav successor states from the point of view of popular music, and demonstrates how transnational musical figures (such as Djordje Balaševi?, Mom?ilo Bajagi?-Bajaga and Ceca Ražnatovi?) are interpreted as symbolic reference points in national ethnopolitical discourse in the process of identity construction. Another symbolic function is served by Serbian turbofolk artists, who in Croatia serve as a cultural resource to distance oneself from a musical genre associated by many urban Croats with the ruralization (and Herzegovinization) of Croatian city space. In addition, value judgements associated with both Serbian and Croatian newly composed folk music provide an insight into the transnational negotiation of conflicting identities in the ex-Yugoslav context. Ultimately the paper shows how the ethnonational boundaries established by nationalizing ideologies created separate cultural spaces which themselves have been transnationalized after Yugoslavia's disintegration

Vertical cavity optoelectronic transceivers for short distance data communications links

Bi-functional optoelectronic devices have significant potential for commercial applications in short haul links where, due to their ability to operate either as source or receiver, they can be used in "ping-pong" communication systems. Such systems are causing increasing interest due to the potential simplification of network design and the cost reductions that can result. In this paper, a new dual-purpose vertical-cavity optoelectronic component (VCOC) is reported, which is shown to allow successful bi-directional link operation, and has the potential of being used in highly parallel systems. The VCOC device developed within our work is based on a standard vertical cavity surface emitting laser diode (VCSEL) in which mirror reflectivities are adjusted to allow both good lasing action and efficient resonant cavity enhanced (RCE) avalanche photodetection. When the VCOC is operated under reverse bias as a detector, the low absorption of the quantum well active region is enhanced by the RCE, as light inside the laser cavity is recycled, thus increasing the probability of carriers being photogenerated [l]. Under forward bias the cavity maintains efficient lasing action. To allow a flexible study, the VCOCs are formed by modifying standard VCSELs using focussed ion beam etching to determine suitable structures for dual purpose operation. Here etches are made to reduce the reflectivity of the top mirror to enhance detection, the etches being formed either across the whole device aperture, or in rings or spots so that separation of the detection and emitting regions can be achieved. This technique is extremely flexible, allowing arbitrary etches to be made on a chip by chip basis

Factors that Determine Child Behavior during Dental Treatment

In this review paper we wanted to summarize all the aspects which could affect the behavior of the child patients in the dental office. At the beginning, the factors that are related to the child patients are mentioned. Various segments of child psychological, cognitive, physiological and other kinds of development are discussed. Also, the reasons for dental fear and anxiety (DFA) and dental behavior problems (DBP) were analyzed, and how the child dental patients could cope with them. Finally, types of patients according to their behavior in the dental office were discussed. Furthermore, the influences of child patients’ parents were studied, including parenting styles, as well as factors related to dentist, dental team and the dental office. Finally, critical evaluation of administration of assets to measure the presence of DFA and DBP is provided. Every part of the text was corroborated by the results from our own and other authors’ recent bibliography data

Anastomotic pseudoaneurysms

Anastomotic pseudoaneurysm is a form of false aneurysm, whose wall, does not consist of all normal layers of arterial wall. Given the rising number of reconstructive vascular procedures, the increase of anastomotic pseudoaneurysm cases is expected. Therefore, identification of causes, clinical manifestations as well as factors which affect the outcome of operative treatment of anastomotic pseudoaneurysms is of great practical value. This retrospectively-prospective study included 87 surgically treated cases of anastomotic pseudoaneurysms in the period from 1991 to 2002. The most often localization of anastomotic pseudoaneurysms. was the inguinal region (68-86.2%), In the majority of cases, they were caused by arterial degeneration in the anastomotic region - 56 cases (65.9%) and infection - 21 cases (24.7%). The most frequent manifestations of anastomotic pseudoaneurysms were bleeding due to rupture in 26 cases (29.9%) and chronic limb ischemia in 22 cases (25.3%). An acute limb ischemia was present in 17 cases (19.5%)., the symptoms caused by local compression to the surrounding structures - in 9 cases (10.3%), and in 12 cases (13.8%), the only manifestation of anastomotic pseudoaneurysm was asymptomatic pulsatile mass, In 32: cases (36.8%), surgical treatment involved the resection of anastomotic pseudoaneurysm and, graft interposition, whereas in 39 cases (44.8%), bypass procedure had to be performed after the resection. Comorbidity significantly increased mortality in the first 30 days. The use of Dacron graft in primary operation significantly improved early results of operative treatment. Absence of infection as the cause of anastomotic pseudoaneurysm is a statistically important prognostic factor of operative treatment, considering the graft patency, limb salvage, infection, need for reintervencion and mortality

Treatment of vascular non-iatrogenic injuries of upper and lower extremities in tertiary vascular center

BACKGROUND: The purpose of this study was to examine demographic and baseline characteristics of patients with vascular injuries of extremities and to define the most relevant factors which influenced an early outcome, as well as limb salvage after the management of vascular trauma. METHODS: This study used the database that included 395 patients with peripheral arterial injuries, who were treated in the tertiary vascular university center in the period between 2005-2020. Exclusion criteria were isolated thoracic, abdominal and neck injuries as well as iatrogenic injuries and injuries of intravenous addicts. Univariate binary logistic regression analysis and multiple logistic regression were used to determine risk factors for lomb loss (after vascular reconstruction) or mortality. Decision to perform primary amputation (without vascular reconstruction) was based on surgeons' preference and experience. RESULTS: Out of 395 vascular injuries treated in the period 2005-2020, 210 (53.2%) presented with non-iatrogenic vascular injuries of upper and lower extremities were analyzed. According to the univariate regression analysis, hemorrhage as the main clinical manifestation on admission (P=0.035) and early reintervention (P=0.048) increased, while an early patency of repaired artery (0.010) significantly decreased a 30-day amputation rate. Multivariate logistic regression analysis of these three variables showed that only early patency of repaired artery significantly decreased the early amputation rate (P=0.009). CONCLUSIONS: Based on presented experience, the patency of vascular reconstruction plays a crucial role in limb salvage in patients with non-iatrogenic peripheral vascular injuries. All factors that might influence the patency should be in focus of improvement