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Öğe Evaluation of the biocompatibility and osteoproductive activity of ostrich eggshell powder in experimentally induced calvarial defects in rabbits(WILEY, 2008) Durmus, Ercan; Celik, Ilhami; Aydin, M. Faruk; Yildirim, Guelsuen; Sur, EmrahThe purpose of this study was to investigate the beneficial effects of particulate ostrich eggshell grafting on the healing of experimentally induced skull defects. The clinical, radiological, histological, and histomorphometrical findings of this material were compared with the results of commercially available demineralized bone matrix (DBM). The study was conducted on 18 adult New Zealand rabbits. One defect served as a control and the remaining ones either were filled with different sized eggshell particles or DBM, in each animal. Clinical and radiological inspections and histologic investigations of the animals were done at the 1st, 3rd, and 6th months of postoperative period. Radiologically, minimal bone regeneration was observed at the empty, control defect sites. The most advanced bone regeneration was in the DBM grafted defects. The eggshell particle grafted defect sites displayed weak bone regeneration at earlier stages, at 1st and 3rd months after operation when compared with demineralized bone matrix. Nevertheless, ossification was satisfactory at 6th month after operation when compared with the control defects. Within the limitations of this study, it was concluded that Ostrich eggshell powder (OSP) is a worth-while bone substitute because it is a safe, cheap, and easily available material. Long-term studies will clarify its possible role in maxillofacial surgery. Further sophisticated experiments should be undertaken before human implantation concerning its osteoproductive activity alone or in combination with other materials. (C) 2007 Wiley Periodicals, Inc.Öğe Pathologic changes in soft tissues associated with asymptomatic impacted third molars(MOSBY-ELSEVIER, 2008) Yildirim, Guelsuen; Ataoglu, Hanife; Mihmanli, Ahmet; Kiziloglu, Dilek; Avunduk, Mustafa CihatObjective. The aim of this study was to examine the need for routine removal of asymptomatic impacted third molars under the prophylactic indication, based on the incidence of pathologic changes. The frequency and type of pathologic conditions associated with impacted third molars were also evaluated. Study design. One hundred twenty impacted third molar dental follicles were submitted for histopathologic examination. The association between dental follicles and pathologic changes, age, gender, and angular position were statistically evaluated. Results. Among these dental follicles, pathologic conditions were found in 23%. The relation between pathologic changes and angular position was not statistically significant (chi(2) = 2.040; P > .05). Pathologic changes were seen mostly in women who were >= 20 years old. Conclusions. Cystic changes may be developed in asymptomatic impacted third molars. Asymptomatic impacted third molars should be removed before pathologic changes can occur.Öğe The supraperiosteal route of dexamethasone should be considered for dental surgery(MOSBY-ELSEVIER, 2010) Apiliogullari, Seza; Yildirim, Guelsuen; Ataoglu, Hanife[Abstract not Available]
