Reinvention of tradition as an urban image: the case of Ankara Citadel

Debates on urban tourism have been coupled with a widespread discourse on 'placelessness', 'loss of identity', and 'standardization' related to the modernist ideology of planning. In this respect, utilizing this historic urban fabric has become important as a means of recreating an urban image. Ironically, efforts to avoid standardization are caught in another trap of sameness and blandness, because a very similar vocabulary is used in the ability of those tourist-historic places to meet the expectations of the universal tourist industry. In this context, we analyzed the recent efforts to integrate an inner-city area, Ankara Citadel and its vicinity, focusing on the changing identity owing to the introduction of income-generating and tourist-attraction facilities. The nature and consequences of this transformation have been investigated in terms of the issues of preservation practice, economic feasibility, public interest, and its ethics and legitimacy.

Influence of Post Space Preparation on the Apical Leakage of Calamus, Single-Cone and Cold Lateral Condensation Obturation Techniques: A Computerized Fluid Filtration Study

Purpose Apical microleakage between the root canal and periapical tissues is considered a common cause of endodontic failure. The aim of this study was to evaluate the apical microleakage of various obturation techniques after immediate post space preparations with different drills. Materials and Methods One hundred twenty human single-rooted teeth were selected for this study. The coronal portions were removed to achieve a uniform length of 15 mm. All root canals were instrumented with ProTaper Next rotary files using crown-down technique. The 120 roots were randomly assigned to 3 experimental groups according to obturation technique (n = 40). The root canals were obturated with lateral condensation in group 1, single-cone technique in group 2, and Calamus 3D obturation system in group 3. Each group was divided into two subgroups (n = 20) according to drill types (Gates Glidden and Peeso drills) leaving 5 mm of apical gutta-percha. The apical microleakage was measured using the computerized fluid filtration meter method. The results were evaluated using Kruskal-Wallis test with Bonferroni Corrected Mann-Whitney U multiple comparison post hoc tests. Results There was no statistically significant difference between obturation techniques after post space preparation with Peeso drills (p > 0.05). In Gates Glidden drill groups, single-cone technique demonstrated higher leakage (0.0051 +/- 0.0037 mu l x min(-1) x cmH(2)O(-1)) than Calamus techniques (0.0019 +/- 0.0012 mu l x min(-1) x cmH(2)O(-1)) (p < 0.017). Conclusions Gates Glidden drills caused the highest apical leakage in teeth obturated with single-cone technique