Purpose: A bioactive high performance polymer (BioHPP) and computer-aided design/computer-aided manufacturing (CAD/CAM) composite resin materials are a relatively new class of dental biomaterials, that are biocompatible and have good aesthetic features. In this review paper, we will summarize literature and publication data on the characteristics of the mentioned materials, as well as their potential application in the dental prosthetics.Study selection: Available studies and literature reviews from PubMed, SCIndex, Scopus and Google Scholar corresponding to polyetheretherketone (PEEK), high-performance polymers, reinforced composite materials, composite materials, resins, glass-fiber reinforced materials, CAD/CAM materials, dental implants, removable and fixed dental were reviewed. Results: To avoid many disadvantages of metals and their alloys in dental practice, such as inadequate color, high density, thermal conductivity and possible allergic reactions, materials based on polymers (such as BioHPP), and CAD/CAM composite resins are being developed. These materials have significantly better aesthetics and physical-mechanical properties. They are biocompatible materials that are lightweight, resistant, durable, exhibit high bending and compression resistance. Conclusions: The use of CAD/CAM composite resin materials and BioHPP in dentistry has begun recently, so the data about their potential clinical use are limited. Most of their features have been demonstrated through laboratory testing, while clinical studies are relatively scarce, so the need for further clinical trials is emphasized.

Celiac disease (CD) is chronic inflammatory disease of the proximal small intestine. It is caused by hypersensitivity to gluten proteins, rays and barley, which damage the intestinal mucous membrane, creating conditions for malabsorption. In addition to intestinal, classic forms of the disease, extraintestinal manifestations may occur. Aphthae in the oral cavity, defects of the enamel, caries, delayed tooth erupting, atrophic glossitis and angular cheilitis are some of them. Serological examination of patients with minimal symptoms and in patients with extraintestinal and atypical gastrointestinal symptoms would improve the timely diagnosis. By careful dental examination of the cavity with a special focus on these changes, we can contribute to early diagnosis of the CD. The education of patients about oral manifestations of CD can improve the quality of life of these patients.

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Background/Aim. C-shaped canals are complex morphological variation of tooth root canal system that if present could greatly affect the outcome of endodontic therapy. Prevalence of these canal configurations varies between populations of different ethnical and geographical origine. Therefore, the goal of this study was to analyse the prevalence and morphology of second mandibular molar C-shaped canals in the population of Central Serbia. Methods. The study included a total of 199 second mandibular molars receiving cone-beam computed tomography (CBCT) examination and determining the presence of Cshaped canal systems, their configuration, minimal wall thickness and its relative position on axial cross-sections at coronal, middle and apical level. Results. Prevalence of C-shaped second mandibular molars was 5.53%. C1 canal configuration was the most frequent at coronal cross-section, while C2 configuration was the most frequent at middle and apical cross-sections. Minimal wall thickness decreased going apically, with the mean value of 1.01 mm at the coronal, 0.87 mm at the middle, and 0.67 mm at the apical cross-sections. Minimal wall thickness was mostly directed lingually at all cross-sectional levels. Conclusions. C-shaped canals should be expected in second mandibular molars of the population of Central Serbia. CBCT is shown to be the most valuable technique to determine C-shaped canals and facilitate understanding of the C-shaped canal morphology; its implementation could improve the success of endodontic therapy, especially if the complex root canal configuration is present.

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