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Objective: The aim of this study was to evaluate the radiographic and histomorphometric results of two different xenografts in bilateral sinus augmentation in patients with posterior maxillary atrophy. Method and Materials: Eight patients with less than 5 mm residual alveolar bone height were included in this study. One side was augmented with bovine bone graft-1 and the other side with bovine bone graft- 2. Radiographic analyses were performed before and after augmentation, and before the implant placement. After 8 months of healing period, bone biopsies were obtained during implant placement. Results: No statistically significant difference was found between the groups, based on post-augmentation and pre-implantation graft heights (P >.05). Histomorphometric evaluation demonstrated 24.63% and 29.13% newly formed bone in the graft-1 and graft-2 groups, respectively. Intergroup differences were not significant for the mean percentage of new bone formation (P >.05). Conclusion: Within the limitations of this study, it can be concluded that xenograft materials resulted in satisfactory bone height and trabecular new bone formation, and they could be used for the rehabilitation of atrophic maxillae.

MATERIAL AND METHODS: Forty dentine specimens obtained from freshly extracted impacted third molars were included and divided into four groups. Group I served as the control, whereas Group II, Group III, and Group IV recieved Er:YAG laser (30?Hz, 60?mJ/pulse, 10?sec), a desensitizing paste (DP) containing 8% arginine and calcium carbonate, and DP+Er:YAG laser in combination, respectively, evaluated under SEM.OBJECTIVE: The aim of this study was to evaluate the in vitro effects of Er:YAG laser and an in-office desensitizing paste alone or in combination by using scanning electron microscopic (SEM) analysis.BACKGROUND DATA: Various treatment modalities have been proposed for dentin hypersensitivity, but to date, no single agent or form of treatment has been found effective.RESULTS: SEM analysis presented occlusion and narrowing of dentinal tubules in all treatment groups, but more prominent occlusion was observed in the combined treatment group. Intergroup comparisons regarding the tubule diameters and the number of the open dentinal tubules per 100?µm2 revealed statistically significant difference in favor of combined group (p

Objective: The objective of this preliminary study was to evaluate the occluding effect of topical gaseous ozone application and Er:YAG laser on human dentine tubules by scanning electron microscopic (SEM) analysis. Methods: Twenty-four dentine specimens were divided into three groups. Group I, including specimens treated only with citric acid, served as the control. Group II was treated with Er:YAG (30Hz 60mJ, 10sec), and Group III received only topical gaseous ozone application (10sec at level 2). Diameters and the number of open dentinal tubules per 100µm2 were counted from SEM photomigrophraphs at ×2000 magnification. Results: In terms of diameters and numbers of open dentinal tubules per 100µm2, both treatment modalities presented significant occlusion. The mean values of the diameters and the number of open dentinal tubules per 100µm2 were observed in Group I, Group II, and Group III, in decreasing order. Significant differences were found among the groups in favor of the topical gaseous ozone applied group. Conclusions: The dentine tubules in both treatment groups were occluded, however more marked occlusion were seen in ozone treated group. © Copyright 2012, Mary Ann Liebert, Inc. 2012.

The aim of this study was to determine the mineralogical and geochemical properties of the rocks and/or soils consumed for making grape molasses and eating which is called geophagy. For this purpose 12 samples were collected from the regions of Nigde Bor, Uluki{dotless}şla and Aksaray-Emirgazi and full rock analyses were carried out including XRD. As a result; clay, mica, carbonate (calcite, dolomite), cristobalite, amphibole, quartz, feldispar and opal-CT minerals were detected. Elemental and trace element analyses were carried out on all samples. Elemental analyses results showed that elements such as CaO+Al2O+Fe2O3 in Bor; CaO+Si2O+Fe2O3 in Uluki{dotless}şla; CaO+MgO in Emirgazi regions were dominant. According to trace elemet analyses, concentrations of Sr, Ba, Ce, Zn and As in Bor; U, Ce, Ba, Zr, Sr, Ni in Uluki{dotless}şla and Ba, Sr, La, Ce, Co, Zr elements in Emirgazi regions drew attention. As a result of these analyses we can say that all samples are lacustrine sediments that are claystone, travertine and dolomite and Neogene aged.