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    Amelogenesis Imperfecta and Generalized Gingival Overgrowth Resembling Hereditary Gingival Fibromatosis in Siblings: A Case Report
    (Hindawi Ltd, 2012) Yaprak, Emre; Subasi, Meryem Gulce; Avunduk, Mustafa; Aykent, Filiz
    Amelogenesis imperfecta (AI) is a group of hereditary disorders primarily characterized by developmental abnormalities in the quantity and/or quality of enamel. There are some reports suggesting an association between AI and generalized gingival enlargement. This paper describes the clinical findings and oral management of two siblings presenting both AI and hereditary gingival fibromatosis (HGF) like generalized gingival enlargements. The treatment of gingival enlargements by periodontal flap surgery was successful in the management of the physiologic gingival form for both patients in the 3-year follow-up period. Prosthetic treatment was also satisfactory for the older patient both aesthetically and functionally.
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    Comparison of color stability of two laminate veneers cemented to tooth surfaces with and without preparation
    (Wiley, 2020) Tuncdemir, Makbule T.; Gulbahce, Nilgun; Aykent, Filiz
    Objective The aim of this study was to determine the effects of preparation vs nonpreparation of tooth surfaces and the types of porcelain laminate veneers (PLVs) on color changes after 300 hours of artificially accelerated aging (AAA). Materials and methods Forty extracted maxillary central incisors were used. The teeth were divided into four groups (n = 10) to evaluate preparation methods and porcelain types: Group A: tooth preparation with IPS e.max computer-assisted design (CAD), group B: tooth preparation with IPS e.max press, group C: nonpreparation with IPS e.max CAD, and group D: nonpreparation with IPS e.max press. Veneers were fabricated and cemented using a dual-polimerized cement. Initial color measurement was performed and repeated after AAA. Color changes were calculated with the CIEDE 2000 (Delta E-00) formula. Color differences were analyzed with two-way ANOVA (P < .05). Results The two-way ANOVA test showed no significant difference among the groups (P > .05). The highest color change value was observed in group C, followed by groups B, A, and D. Conclusion Preparation of veneers caused more color changes in PLVs than nonpreparation. However, IPS e.max CAD systems for fabrication of nonprepared PLVs increased the color change of the PLVs measured after AAA. Clinical Significance The results provide information on the effect of the amount of preparation and the type of porcelain on color change in porcelain laminate veneers. In terms of esthetic dentistry, IPS e.max press and non-prep treatment should be used in the anterior region, where esthetics are important.
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    In vitro evaluation of the marginal fit of different all-ceramic crowns
    (Elsevier Taiwan, 2013) Yucel, Munir Tolga; Aykent, Filiz; Avunduk, Mustafa Cihat
    Background/purpose: The marginal fit of all-ceramic restorations is a very important criterion for their long-term success. The aim of this in vitro study was to compare the marginal adaptation of crowns fabricated with four different all-ceramic systems using an image analysis method. Materials and methods: A standardized all-ceramic preparation was made on a stainless steel die. Eighty gypsum dies were duplicated from this die and randomly divided into four groups of 20 each. Cerec 3, In-Ceram, IPS Empress 2, and Celay crowns were fabricated on dies of each group following the manufacturers' instructions. Marginal gaps of the crowns were evaluated without cementation on their own gypsum dies and then on the master die with a stereomicro-scope and image analysis program. Two-way analysis of variance and Tukey's honest significant difference tests were used to evaluate the data (alpha = 0.01). Results: Mean gap dimensions and standard deviations at the marginal opening of the crowns evaluated on the gypsum dies were 21.5 +/- 4 mu m for Celay, 29.3 +/- 5 mu m for IPS Empress 2, 33 +/- 4 mu m for Cerec 3, and 74.6 +/- 10 mu m for In-Ceram crowns. Mean gap dimensions and standard deviations at the marginal opening of crowns evaluated on the master steel die were 27.8 +/- 4 mu m for Celay, 41.5 +/- 7 mu M for IPS Empress 2, 47.4 +/- 5 mu m for Cerec 3, and 94.9 +/- 10 mu m for In-Ceram crowns. Marginal opening values measured on the master die were higher than those of gypsum dies. Conclusion: In-Ceram all-ceramic crowns showed the largest marginal gap, and Celay crowns showed the smallest marginal gap in both die groups. The marginal discrepancies found in this study were all within the clinically acceptable standard of 120 mu m. Copyright (C) 2012, Association for Dental Sciences of the Republic of China. Published by Elsevier Taiwan LLC. All rights reserved.