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Öğe Comparison of stability of absorbable and titanium plate and screw fixation for sagittal split ramus osteotomy(CHURCHILL LIVINGSTONE, 2004) Dolanmaz, D; Uckan, S; Isik, K; Saglam, HSix unembalmed adult sheep mandibles were stripped of all soft tissues and sectioned at the midline. Each side had a sagittal split ramus osteotomy (SSRO) and was advanced 5 mm. Six of the hemimandibles were fixed with four-hole extended titanium miniplates and titanium screws, and the other six were fixed with four-hole extended absorbable plates and absorbable screws. At[ specimens were mounted in a servohydraulic testing unit, and a range of forces (0-140 N) was applied. Displacement of each proximal segment was recorded at 1 ON increments from 0 to 140 N. Values for the two groups were compared using the Mann-Whitney U-test, and significant differences in displacement were seen only at loads between 10 and 50 N. The results indicate that when absorbable miniptates are used intermaxillary fixation may be necessary to stabilise the bony fragments in the early postoperative period. (C) 2003 The British Association of Oral. and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.Öğe Expression of Fas and Fas-ligand and analysis of argyrophilic nucleolar organizer regions in squamous cell carcinoma: relationships with tumor stage and grade, and apoptosis(CHURCHILL LIVINGSTONE, 2005) Guler, N; Uckan, S; Celik, I; Oznurlu, Y; Uckan, DThe aim of this study was to investigate whether levels of Fas and Fas-ligand (Fas-L) expression in oral and oropharyngeal squamous cell carcinomas (SCCs) are associated with tumor stage and grade, and to assess whether parameters related to argyrophilic nucleolar organizer regions (AgNORs) correlate with apoptosis in SCC cells and adjacent normal epithelium. Fifty-two specimens taken from the tumoral and neighboring normal tissues of 26 patients with oral and oropharyngeal SCC were analyzed for Fas/Fas-L expression, and 24 specimens from 12 patients for AgNOR parameters. Seventeen (65%) of the tumors were Fas and/or Fas-L-positive (by immunohistochemistry). A significant positive correlation was found between Fas/FasL expression and clinical tumor stage (P < 0.01). Mean AgNOR number per nucleus, AgNOR size and the percentage area of each nucleus occupied by AgNORs (percent of nuclear area) were significantly increased in the SCC cells (4.49 +/- 1.28, 4.48 +/- 1.42, 5.56 +/- 1.22, respectively) when compared with the control neighboring squamous epithelial cells (2.58 +/- 0.61, 1.64 +/- 0.59 and 4.35 +/- 0.62%, respectively) (P < 0.01). A significant positive correlation was found between the AgNOR parameters and Fas/ Fas-L expression as apoptotic markers in the tumoral cells of SCC (P < 0.05). There was also a significant positive correlation between the AgNOR parameters and the grading of tumors (P < 0.05). In conclusion, AgNOR count was a strong proliferation marker in patients with SCC, and Fas and Fas-L staining was useful in tumor grading.Öğe Management of early relapse after a sagittal split ramus osteotomy by gradual callus distraction: A case report(W B SAUNDERS CO, 2000) Uckan, S; Buchbinder, D; Orhan, M; Mutlu, N[Abstract not Available]Öğe Non-ossifying fibroma of the mandible: Report of a case(CHURCHILL LIVINGSTONE, 1999) Uckan, S; Gurol, M; Mutlu, N; Gungor, S[Abstract not Available]Öğe Persistent painful swelling in the posterior mandible(W B SAUNDERS CO-ELSEVIER INC, 2004) Oz, G; Dolanmaz, D; Uckan, S; Gunhan, M; Armstrong, AW[Abstract not Available]Öğe Reconstruction of a total maxillectomy defect with a zygomatic implant-retained obturator(LIPPINCOTT WILLIAMS & WILKINS, 2005) Uckan, S; Oguz, Y; Uyar, Y; Ozyesil, ATreatment options of maxillary fibrous dysplasia are surgical recontouring or total or partial maxillectomy depending on the site and behavior of the lesion. Among the reconstruction procedures, which include many surgical options, reconstruction using a maxillary obturator is the least invasive one. This report describes a case of aggressive maxillary fibrous dysplasia that was treated with a total maxillectomy and reconstructed with a malar implant-retained maxillary obturator.Öğe Surgical and reconstructive treatment of a large ossifying fibroma of the mandible in a retrognathic patient(W B SAUNDERS CO, 2001) Gurol, M; Uckan, S; Guler, N; Yatmaz, PI[Abstract not Available]
