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Subject: search.filters.subject.Dental implants

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    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; 25661636
    INTRODUCTION: 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.
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    Positive effect of platelet rich fibrin on osseointegration
    (2016) Oncu, Elif; Bayram, Burak; Kantarci, Alpdogan; Gulsever, Serap; Alaaddinoglu, Emine-Elif; 0000-0001-6718-3882; 27475686
    Background: 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.