Fakülteler / Faculties
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Item Evaluation Of Relationship Between Gingival Phenotype And Perıodontal Status(2022) Babayigit, Osman; Yarkac, Fatma Ucan; Atay, Ummuhan Tekin; Sen, Dilek Ozkan; Oncu, ElifDetermining the gingival phenotype and knowing its relationship with clinical periodontal parameters is critical in terms of guiding the clinician and the treatment results. The present study evaluated the prevalence of gingival phenotype and its relationship with crown shape, papilla height (PH), keratinized tissue width (KTW), and risk factors. A total of 90 individuals, 53 females and 37 males were included in the study. Based on the transparency of a periodontal probe through the buccal gingival margin, was determined thin phenotype and thick phenotype groups. Sociodemographic data, oral hygiene status and clinical periodontal parameters, supracrestal gingival height (SGH), crown width/crown length ratio, PH, and KTW were evaluated. No statistical difference (p>0.05) was detected neither for the correlation between different phenotypes (thick/thin) and SGH nor for associating phenotypes and crown width/crown length ratio. Additionally, there was no statistically significant difference in periodontal parameters and PH between thick and thin phenotype groups (p>0.05). PH was higher for individuals with rectangular crown shapes compared to individuals with square crown shapes (p<0.05). It was found that the prevalence of rectangular and square crown shapes was equal and the thick gingival phenotype was higher in the Turkish population. There was no correlation between the gingival phenotype and crown shape, periodontal parameters, and papilla heights. It has been shown that individuals with a thick phenotype have higher KTW and the shape of the crown in the anterior region of the maxilla affects the height of the papilla. Copyright (C) 2013 - All Rights Reserved - PharmacophoreItem Combined use of alveolar distraction osteogenesis and segmental osteotomy in anterior vertical ridge augmentation(2015) Oncu, Elif; Isik, Kubilay; Alaaddinoglu, E.Emine; Uckan, Sina; 0000-0001-6718-3882; 25661636INTRODUCTION: Vertical defects of the anterioral veolar ridge are challenging cases in implant dentistry. Various techniques, such as onlay bone grafting, segmental osteotomy (SO) oral veolar distraction osteogenesis (ADO), have been suggested to manage those situations. ADO has an advantage of being capable of enhancing both hard and soft tissue simultaneously. PRESENTATION OF CASE: One of the possible complications of ADO is rotation ortilting the transport segment (TS). In this report, we present a 30-year old woman who had a severe anterior vertical deficiency. ADO was started to manage the case, but advancement of the TS lagged on the left side and the segment rotated. A SO was planned and the lagged side was corrected. Two years after the surgery, hard and soft tissue gains were found to be preserved. DISCUSSION: Vertical alveolar bone deficiencies are challenging cases for dental implantology. Alveolar DO promotes soft tissue along with hard tissue, and the bone regeneration process and shows lower infection rates and greater stability over the long term. However, the technique has some disadvantages and can lead to complications, such as breaking of the distraction device, nerve injury or paresthesia, fracture of transport bone, hematoma, wound dehiscence, severe bleeding, and even jaw fractures. Deviation of the TS from the distraction path is another undesired situation. The rigidity of the device, the width of the mucosa, the volume of the transport and anchor segments, and the amount of augmentation can affect vector deviation. CONCLUSION: We suggest that SO can be used in similar cases in which TS could not be distracted on a straight vector line. (C) 2015 Published by Elsevier Ltd. on behalf of Surgical Associates Ltd.Item Positive effect of platelet rich fibrin on osseointegration(2016) Oncu, Elif; Bayram, Burak; Kantarci, Alpdogan; Gulsever, Serap; Alaaddinoglu, Emine-Elif; 0000-0001-6718-3882; 27475686Background: Leukocyte-platelet rich fibrin (L-PRF) is a second generation platelet concentrate clinically used to accelerate tissue healing and bone regeneration. Achieving reduced implant osseointegration time could provide immediate or early loading of implants. The aim of this study was to evaluate the L-PRF-induced osseointegration and bone-implant contact (BIC) in an experimental animal model. Material and Methods: Twelve 4-month-old New Zealand white rabbits were used. Following general anesthesia, 3-5 mL of blood was obtained from the central artery in rabbit ear and L-PRF was prepared. Two implant cavities (5 mm long and 3 mm in diameter) were created in each tibia with a total of four cavities in each animal. Two of these cavities were selected and covered with PRF (test group). The remaining L-PRF was used to soak the implants placed into the L-PRF covered sockets. Other cavities were left as controls. In total, 48 implants were placed. Animals were sacrificed after two, three, or four weeks. Histological samples were obtained and peri-implant tissues were histomorphometrically evaluated for bone-to-implant contact and new bone formation. Results: Histomorphometric analyses of the defects revealed that the L-PRF was detectable up to the second week. Application of L-PRF increased the rate and amount of new bone formation in the experimental group compared to the control group. Bone-to-implant contact was enhanced when the surface was pre-wetted with L-PRF (p<0.01). Conclusions: The results of this study demonstrated that L-PRF application may increases amount and rate of new bone formation during the early healing period and provides a faster osseointegration around implants.