Cilt:48 Sayı:01 (2021)

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    Color stability and surface roughness of resin based direct and ındirect restorative materials
    (Ankara Üniversitesi Diş Hekimliği Fakültesi, 2021) Ersöz, Bilge; Other; Other
    This study investigated discoloration and surface roughness (Ra) in resin-based computer aided design (CAD)/computer aided manufacturing (CAM) blocks and direct and indirect composite resins. Using a Teflon mold, disc shaped specimens (8×2 mm2) were fabricated from direct (Estelite Asteria and GrandioSO) and indirect (Gradia Plus) composite resins, and specimens (12×14×2 mm3) were prepared from composite resin CAD/CAM blocks (Vita Enamic, Brilliant Crios, and Cerasmart) (n=10). A profilometer was used to determine the Ra values of all 60 polished samples. These specimens were thermocycled between 5 and 55°C for 3,000 cycles, and they were immersed in coffee solution (37°C) for 1 and 7 days. A spectrophotometer was used to determine the color change (∆E00) with the CIEDE2000 formula after the specimens were polished. ANOVA TUKEY test was performed to analyze the data. The lowest degree of discoloration among the materials tested was found in Vita Enamic (<0.05), whereas the highest degree of discoloration was found in the Gradia Plus indirect composite (<0.05). Direct composite resins have a higher discoloration potential over resin-based CAD/CAM blocks, whereas they are less prone to discoloration than indirect composite resins.
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    Management of emergency cases in endodontics practice during the covid-19 pandemic: a literature review
    (Ankara Üniversitesi Diş Hekimliği Fakültesi, 2021) Oncu, Ayşenur; Diş Hekimliği; Diş Hekimliği Fakültesi
    The aim of this review is to evaluate emergencies and treatment approaches encountered in the endodontics clinic during the Covid-19 epidemic process. For this study, articles on dentistry related to Covid-19 in PubMed and Google Scholar databases were searched. Clinicians should know the infection transmission routes and prevention methods well. In this duration, it is substantial to distinguish which case is urgent and to complete the necessary treatment in a short time. This paper presents useful suggestions for dental emergency practice.
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    Biocompatibility evaluation of resin-based restorative materials: a review
    (Ankara Üniversitesi Diş Hekimliği Fakültesi, 2021) Çimen, Ceren; Diş Hekimliği; Diş Hekimliği Fakültesi
    Biocompatibility is described as an appropriate biological response of a biomaterial in a living organism. It is known that biomaterials are not inert and the materials should be tested before they are allowed to be used in clinical practice. Various test methods have been developed and protocols have been determined for this purpose. Resin-based restorative materials are extensively used in dentistry due to the increased aesthetic demands of patients and the ease of use in clinical practice. As the restorative materials function in the mouth for long years, concerns regarding the biocompatibility of resin-based restorative materials become more important. Regarding the importance of this issue, the purpose of this review is to evaluate the local and systemic potential toxicity of resin-based restorative materials, toxicity test methods, and the mechanism of the cytotoxicity in living tissues.
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    Evaluation of the effect of osteoporosis on mandible with mandibular ındexes using panoramic radiography and cone beam computed tomography
    (Ankara Üniversitesi Diş Hekimliği Fakültesi, 2021) Bilgili, Ersen; Other; Other
    Purpose: The purpose of the study is to evaluate the effects of osteoporosis (OP) using panoramic mandibular index (PMI) and mandibular cortical index (MCI) in panoramic radiographic and cone-beam computed tomographic (CBCT) images and to demonstrate any advantages of CBCT versus panoramic imaging in those indexes. Materials & Methods: 36 female patients (18 with osteoporosis and 18 with no systemic disease) who had panoramic radiographic and CBCT indication due to dental problems were involved in the study. PMI and MCI are evaluated on both panoramic and CBCT images. Differences between patient groups are analyzed by the Kruskal Wallis test, and differences between imaging techniques are analyzed by impaired t-tests ignoring patient groups in confidence interval 95%. Results: In CBCT images, PMIs were significantly lower in patients with osteoporosis than in the control group (p=0.004), and there was no significant difference between the patient and control group in panoramic images (p=0.085). In both imaging techniques, MCIs were significantly higher in the osteoporosis group than in the control group (p=0.000). CBCT showed a significant advantage on PMI to panoramic images (p=0.05). Conclusion: Systemic diseases affect bone tissue in different levels, and to evaluate these effects, cortical and trabecular bone parts must be investigated separately, and findings must be combined with patients’ clinical symptoms. CBCT has advantages in PMI evaluations to panoramic radiography.
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    A rare presentation of radicular cyst: a case report and review of literature
    (Ankara Üniversitesi Diş Hekimliği Fakültesi, 2021) Jagtap, Rohan; Other; Other
    The radicular cyst is the most common inflammatory odontogenic cyst in the jaws. It is a periapical lesion associated with non-vital teeth in the tooth-bearing regions of the jaws with a slight male predilection. A radicular cyst is typically asymptomatic, but if large or secondarily infected may cause swelling. The usual radiographic appearance of a radicular cyst is that of a periapical radiolucent lesion. This case report documents a rare case of 61-year-old male with a mixed-density periapical lesion diagnosed as a radicular cyst. The lesion presented as a well-defined, expansile, space occupying, corticated, sclerotic, hydraulic, unilocular, mixed density lesion, associated with the right mandibular second premolar that was predominantly radiolucent with scattered foci of radiopacities. Microscopic examination revealed fragments of lining epithelium along with small fragments of inflamed fibrous connective tissue, aggregates of necrotic cellular debris, and bacterial colonies intermixed with foci of dystrophic calcifications. The histopathological diagnosis was a radicular cyst with dystrophic calcification. Although rare, this entity should be considered in the differential diagnosis of mixed-density periapical lesions. Complete history and proper diagnosis is important in this type of rare cases as treatment varies between a radicular cyst and other odontogenic neoplasms.
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    The ınitiation of european annals of dental sciences
    (Ankara Üniversitesi Diş Hekimliği Fakültesi, 2021) Bezgin, Tuğba; Diş Hekimliği; Diş Hekimliği Fakültesi
    On behalf of the Edito- rial Board, I am delighted to announce the publica- tion of the first issue of the European Annals of Dental Sciences. European Annals of Dental Sciences is the of- ficial scientific publica- tion of Ankara University Faculty of Dentistry. This journal was first introduced in 1972 under the name of "Ankara Üniversitesi Diş Hekimliği Fakültesi Dergisi / Journal of Ankara University Faculty of Dentistry". Since then, it had made significant scientific contributions to the field of dentistry. Now, almost after 50 years, we have renamed our publication European Annals of Dental Sciences in 2021 and changed the publication language to English to facilitate an effective world-wide transmission of new and innovative research and knowledge related to dentistry. Our Editorial Board now includes mentors with robust academic background from different dental specialties who surely will enhance our publication quality. This issue owes much to many people. Thanks are due first to Profes- sor Erhan Ozdiler, the former Editor-in-Chief, for his unfailing support. His commitment to research is inspiring. As incoming editors, we will try to keep his legacy alive. We, on behalf of the Editorial Board, dedicate our first issue to him. I would like to extend a big thank you to our Dean, Professor Kaan Orhan. It is a privilege to work with a leader like him. We are honored by the trust he placed in us and will do our best to increase the quality of the journal to the higher levels it deserves. We are also grateful to our Vice Dean, Associate Professor Mehmet Eray Kolsuz for his support. Most of all, my endless thanks are to my co-editors, Associate Professors Gülbike Demirel and Ismail Hakkı Baltacıoğlu, who have so generously dedicated their time and expertise to make this project happen. No detail, large or small, has been beyond their notice. Their professionalism, good friendship and hard work have made this issue possible. Our special gratitude must also go to the members of our Editorial Board, whose role has been vital in ensuring that the journal maintains a high standard. I also would like to thank the reviewers of this first issue who admirably spend their valuable time to review our articles and all authors who contributed manuscripts. We hope our readers will enjoy reading our first issue, and that EADS will continue to successfully share the good quality dental knowledge with a wider audience.
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    Evaluation of shear bond strength of different resin cements after zirconia surface treatments
    (Ankara Üniversitesi Diş Hekimliği Fakültesi, 2021) Hayran, Yeliz; Other; Other
    Aim: The aim of the study was to evaluate the shear bond strength (SBS) of different resin cements after zirconia surface treatments Materials and Methods: A total of 60 zirconia discs (3x7mm) were prepared and divided into 3 main groups according to the surface treatments as control (C), sandblasting (SB), and tribochemical silica coating (TC). Main groups were divided into two subgroups according to two different resin cements were applied. No surface treatment was applied to the samples in C group. 50μm Al2O3 particles were applied to the samples in SB group for 10 s at a distance of 10 mm under 4 atm. TC group were tribochemically coated with alumina particles. Self-adhesive resin (ME) and multi-system dual-cure adhesive resin (NX3) was applied to the subgroups. After cementation, all samples were tested for SBS. SBS values were statistically analyzed by the Kruskal-Wallis and Mann-Whitney U tests. Results: Regardless of the cement type, SBS values of the surface treated samples were statistically different (p <0.001). Group SB was determined as the group with the highest SBS value. This group was followed by Group C and Group TC, respectively. The SBS values of the samples according to the resin cements and surface treatments were statistically significantly different (p<0.001). SBS values of the samples cemented with NX3 resin cement were found to be higher than the samples treated with ME resin cement. Conclusion: SB increased resin bond to zirconia. It is more advantageous to use multi-system dual cure adhesive cements in zirconia cementation.
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    The effects of coffee and energy drink on color stability of hybrid ceramics
    (Ankara Üniversitesi Diş Hekimliği Fakültesi, 2021) Sarıkaya, Işıl; Diş Hekimliği; Diş Hekimliği Fakültesi
    Purpose: The aim of this study was to compare the color stability of two different hybrid ceramic materials. Materials & Methods: Using the precision cutting device (Micracut, Metcon, Turkey), 36 specimens (12 x 15 x 1 mm) were obtained from Vita Enamic (Vita Zahnfabrik, Germany) and Lava Ultimate (3M ESPE, St.Paul, USA) CAD / CAM blocks. After finishing procedures were completed, all specimens were stored in distilled water for 24 h. Then, the specimens were dried and the initial color measurements were made. L, a, b values were determined using a spectrophotometer (Vita Easy Shade, Vita Zahnfabrik, Germany). The specimens were then divided into 3 test groups and stored in coffee (Nescafe Classic, Turkey) (G2, G5), energy drink (Red Bull, Austria) (G3, G6), and in the distilled water as the control group (G1, G4), for 48 h. After 48 h, the specimens were washed with distilled water and dried. Second color measurements were made. ∆E00 values were calculated using the CIEDE 2000 color-difference formula. Results: Data were analyzed by two-way ANOVA. Multiple comparisons were made with Bonferroni’s test. There was a statistically significant difference between 2 ceramics (p=0.035). Generally, Lava Ultimate showed more color change than Vita Enamic. Among the beverages, coffee was significantly different for both ceramics than control and energy drink (p<0.05). Conclusion: Lava Ultimate, showed more color change than Vita Enamic. Coffee has also been determined as the most colorant drink for both hybrid ceramics.
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    Rehabilitation of a severely worn dentition with partial lithium-disilicate glass ceramic restorations: a case report
    (Ankara Üniversitesi Diş Hekimliği Fakültesi, 2021) Oğuz, Ece İrem; Diş Hekimliği; Diş Hekimliği Fakültesi
    Rehabilitation of worn dentition is a challenging task because several predisposing factors may be included in the pathogenesis. The treatment options and process should be carefully considered based on the clinical condition and patients’ requirements. This case report represents the esthetic rehabilitation of a 68-year-old patient who exhibited severely worn teeth caused by attrition and erosion. After clinical evaluation, 3 mm increase in occlusal vertical dimension was planned with partial lithium-disilicate ceramic restorations as laminate veneers for anterior teeth and vonlays (onlays with veneer extentions) for posterior teeth in maxilla. The adaptation of the patient to the increased occlusal vertical dimension was tested for 1 month by provisional direct composite restorations. As the patient did not show any discomfort, definitive restorations were completed. The patient was satisfied with the esthetics and functionality of her new dentition.