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    Comparison of traditional and novel remineralization agents: A laser fluorescence study
    (Kerman Univ Medical Sciences, 2020) Aras, Ahmet; Celenk, Sema; Atas, Osman
    BACKGROUND AND AIM: The first clinical symptom of tooth decay is the appearance of a white spot lesion (WSL) on the tooth surface. This study is performed with the aim to evaluate the efficacy of six different remineralization agents in vitro with the DIAGNOdent laser fluorescence method. METHODS: In this study, 44 extracted, impacted human wisdom teeth (88 specimens) without caries were used to obtain standard demineralized enamel surfaces. The teeth were divided into eight groups consisting of two control (positive and negative) and six experimental groups [Fluoride (F) gel, casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) cream, CPPACP + F cream, NovaMin + F toothpaste, Xylitol-Hydroxyapatite + F cream, and Ozone + F]. De-/re-mineralization solutions were applied with a pH-cycle approach to areas of 3 x 3 mm on the buccal/lingual surfaces of the teeth for 9 days. The remineralization agents were applied to the demineralized areas and the samples were then kept in artificial saliva. The DIAGNOdent measurements were performed before and after the application of the remineralization agents. The Wilcoxon and Kruskal-Wallis tests were used for analysis of the data. RESULTS: The mean scores obtained after the DIAGNOdent measurements were 3.82 and 6.91 in the negative-control and positive-control groups, respectively. There were significant differences in the scores before and after the remineralization procedure in all experimental groups (P < 0.050). When the mean differences before and after treatment were compared between the groups, CPP-ACP + F provided significantly more remineralization than other experimental groups (P < 0.050). CONCLUSION: Remineralization of demineralized areas was achieved in all experimental groups. The highest degree of remineralization according to the DIAGNOdent scores before and after the procedure was observed in the CPP-ACP + F group.
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    Effects of toothache on the educational and social status of children
    (Univ Indonesia, 2019) Dogan, Mehmet S.; Aras, Ahmet; Atas, Osman; Karaali, Abdullah E.; Gunay, Ayse; Akbaba, Haluk M.; Yavuz, Izzet
    Background: Untreated tooth cavities and the resulting toothaches have significant effects on children's social and psychological development. The aim of this study was to evaluate the impact of toothache on children's educational and social activities. Methods: For this retrospective study, we issued a 15-question survey to the parents of 515 children between ages of 5-16 years in Diyarbakir, Turkey. The chi-square test was used to test the strength of the relationship between two variables (p = 0.05). Results: 318 (61.7%) parents reported having difficulty in feeding their children, 94 (18.3%) left a game due to toothache, 173 (33.6%) had school absences, 167 (32.4%) avoided laughing, and 439 (85.2%) parents felt that dental problems influenced their child's success in school. Conclusions: Tooth pain has a negative impact on school and the social lives of children. Families need education about this issue, and health policies should be developed to address this problem.
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    Evaluation of Microleakage Caused by Different LED Light Sources in Composite Resins with AutoCAD Program
    (Sci Printers & Publ Inc, 2020) Cangul, Suzan; Atas, Osman; Adiguzel, Ozkan; Erpacal, Begum; Bakir, Metin; Eskibaglar, Mehmet
    OBJECTIVE: To use AutoCAD software to examine the microleakage of bulk-fill composites occurring as a result of polymerization with different light sources. STUDY DESIGN: In a total of 40 extracted first molar teeth, class I cavities were opened. Then 4 groups were formed of 10 samples in each group. All the samples were restored with SDR bulk-fill composite. The samples were polymerized with an LED light source as follows: Group 1, Mikado; Group 2, Woodpecker; Group 3, Planmeca; and Group 4, CarboLED. Each tooth was divided into 2 sections. Each section was examined under stereomicroscope, and the dimensions of the leakage surface area were measured with AutoCAD software. In the statistical evaluations of the data, the Kruskal-Wallis and Tukey B tests were used. RESULTS: Significant differences were found between the groups in the statistical evaluations (p <0.05). The highest value was found in the CarboLED group and the lowest value was found in the group where Mikado light source was used. CONCLUSION: There are many factors affecting polymerization. Since there are insufficient studies on this subject, it should be supported with new research.
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    Evaluation of the use of PEEK material in post-core and crown restorations using finite element analysis
    (Mosher & Linder, Inc, 2020) Tekin, Samet; Adiguzel, Ozkan; Cangul, Suzan; Atas, Osman; Erpacal, Begum
    Purpose: To compare the stresses generated after the use of low elastic modulus polyetheretherketone (PEEK) as dental post and crown material with glass fiber post and metal supported ceramic crowns using finite element analysis. Methods: First an image of a maxillary central incisor taken on micro-computed tomography (microCT) was uploaded to a computer program. Modeling was made of all the materials in the computer environment and 3-dimensional (3D) virtual models were obtained. Using two different post materials (glass fiber and PEEK post) and two different crown materials (metal supported ceramic and PEEK crown), the modeling of the maxillary central tooth was completed and a total of four groups were obtained. Finally, 135 degrees and 100 N forces were applied from the midpoint of the palatal surface. Results: The FEA analysis showed the use of PEEK as post material decreased the stress values in the post, post cement and composite core models and did not have any significant change in the dentin and crown cement models. The use of composite veneer with PEEK substructure as crown material reduced stress values in dentin, the post and composite core and increased stress values in both the post cement and the crown cement.
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    Microleakage of novel glass ionomer restoration in cavities prepared by Er,Cr:YSGG laser: An in-vitro study
    (Wolters Kluwer Medknow Publications, 2020) Atas, Osman; Celenk, Sema; Aras, Ahmet
    Aim: To compare the microleakage of novel materials containing glass ionomer, which are applied to standard class V cavities prepared by Er,Cr:YSGG (erbium, chromium-doped yttrium, scandium, gallium, and garnet) laser and by conventional diamond bur in primary teeth. Materials and Methods: Fifty non-carious primary molar teeth were randomly divided into five main groups and restored with various materials containing glass ionomers (Group 1: Equia System; Group 2: Fuji IX GP; Group 3: Fuji II LC; Group 4: Dyract Extra; and Group 5: Giomer). Each group was divided into two subgroups according to laser and conventional preparation methods. Results: As for the gingival margin, in terms of leakage values, no statistically significant difference was observed between drill and Er,Cr:YSGG laser although less microleakage values were obtained in Er,Cr:YSGG laser groups 1 and 4 (P > 0.05). Among groups prepared by drill, the lowest leakage rates observed at the gingival margin are Equia System, Giomer, Dyract Extra, Fuji II LC, and Fuji IX GP, respectively. Among groups prepared by Er,Cr:YSGG laser, the lowest leakage rates observed in the gingival edge are Equia System, Giomer = Dyract Extra, Fuji IX GP, and Fuji II LC, respectively. Conclusion: Occlusal and gingival microleakage scores were the lowest in the groups restored with Equia system in the cavities prepared by both diamond bur and laser system. Equia system consisting of high-viscosity glass ionomer cement and nano-filled surface coat G-Coat Plus materials could be used successfully in pediatric dentistry.