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  1. Ana Sayfa
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Yazar "Tekin U." seçeneğine göre listele

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  • Küçük Resim Yok
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    Amputation of an extra-root with an endodontic lesion in an invaginated vital maxillary lateral incisor: A rare case with seven-year follow-up
    (Iranian Association of Endodontics, 2016) Çalışkan M.K.; Asgary S.; Tekin U.; Güneri P.
    The developmental abnormality of tooth resulting from the infolding of enamel/dentin into the root is called dens invaginatus. Management of such cases is usually challenging due to the morphological complexity of root canal system. This report presents a rare treatment protocol of a clinical case of Oehler’s type III dens invaginatus combined with an endodontic lesion in a vital maxillary lateral incisor. Access to the endodontic lesion located between the central and lateral incisors was achieved by reflection of a full mucoperiosteal flap. Granulomatous tissue as well as aberrant root was removed and the surface of the root and adjacent coronal region were reshaped. Three years later, the patient was orthodontically treated. Seven years after completion of surgical/orthodontic management, the tooth remained asymptomatic and functional with normal periodontium/vital pulp. Radiographically, the healing of the lesion was observed. Actually, vitality of the invaginated tooth and communication between the invagination and the root canal were the most important factors in determining such minimally invasive treatment protocol. Depending on the anatomy of the root canal system, surgical amputation of an invaginated root can be performed to achieve a successful outcome in Oehler’s type III dens invaginatus cases, even though it is associated with apical periodontitis. © 2016, Iranian Association of Endodontics. All Rights Reserved.
  • Küçük Resim Yok
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    Comparison of inferior alveolar nerve block and intraligamentary anesthesia on the discomfort of children
    (2012) Tekin U.; Ersin N.; Oncag O.; Bent B.; Menderes M.; Kocanali B.
    Intraligamentary anesthesia(ILA) can be an alternative to inferior alveolar nerve block(IANB) for the extraction of primary molars. To evaluate the effects of ILA and IANB on the discomfort of children during the extraction of mandibulary first primary molars. A single-blind, randomized split mouth study. Twenty-nine healthy children participated in this study. Dental Subscale of Children's Fear Survey Schedule(CFSS-DS) was used to evaluate the dental fear of children. Visual analog scale(VAS) scores of both ILA and IANB groups were recorded during the injection procedure. Heart rate values were recorded during the injection, decollement and extraction periods. Pain perceptions of children were evaluated with sound, eye and motor (SEM) scale by two trained observers during the injection and extraction procedures. The mean CFSS-DS score (22.86±5.829) did not indicate significant dental fear. Altough VAS scores of IANB was higher than ILA, there was no statistically significant difference between them (p>0.05). A significant higher mean SEM score for IANB group was recorded in comparison to ILA during both injection and extraction periods (p<0.05). There were no statistically significant differences in heart rate during different procedures between two groups (p>0.05). Statistical analyses were performed using the SPSS 18.0 for Windows. Chi Square test, variance analysis and Wilcoxon signed ranks tests were used. ILA provides effective local pain control and may be an alternative method especially for children.
  • Küçük Resim Yok
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    Effect of abutment and implant shapes on stresses in dental applications using fem
    (2011) Mammadzada S.; Artunç C.; Sen F.; Güngör M.A.; Tekin U.; Çömlekoglu E.
    In this study, the effect of abutment and implant shapes on stresses in dental applications was investigated, numerically. During the numerical analysis, finite element method (FEM) was used due to a powerful stress analysis method. The three different abutment-implant systems based on producing from different commercial firms were modeled. The Nextengine and Rhinoceros programs were used for three dimensional tooth scan and creation of the solid models. Additionally, Algor Fenpro analysis program was used for three dimensional stress analyses. According to obtained results, the Von Mises stress distributions on abutment, implant and cortical bone are affected from abutment and implant shapes, clearly. If it is possible, the using of any hole in the implant should not be used. Additionally, the bigger collars on the abutment provide to reduce of Von Mises stresses. Copyright © Association for Scientific Research.
  • Küçük Resim Yok
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    The influence of levetiracetam on psychosocial and behavioral functioning in children: A case–control and follow-up study
    (Academic Press Inc., 2017) Bektaş G.; Tekin U.; Özkan M.U.; Yıldız E.P.; Çalışkan M.; Özmen M.; Aydınlı N.
    Background Levetiracetam, a widely used antiepileptic drug in children, has been associated with psychosocial and behavioral problems, which are also influenced by epilepsy variables, including duration or seizure frequency. Purpose The objective of this study is to investigate the frequency and timing of treatment-emergent psychosocial and behavioral problems in children receiving levetiracetam, irrespective of seizure variables which are possible confounders. Methods A prospective, case–control study with a 3-month follow-up was conducted. Consecutive children aged 6 to 16 years with new-onset partial seizures were included in case of starting treatment with either levetiracetam or valproic acid. Psychosocial and behavioral functioning were assessed using a set of standardized questionnaires including Strengths and Difficulties Questionnaire (SDQ) and Children's Depression Inventory (CDI) at baseline, 1 and 3-month follow-up. Patients' baseline scores were compared to healthy subjects. The difference in the follow-up SDQ and CDI scores was evaluated in patients receiving levetiracetam and valproic acid. Results A total of 101 participants were analyzed; 32 patients in levetiracetam group, 19 patients in valproic acid group and 50 healthy controls. Baseline SDQ and CDI scores were not statistically different between patients and healthy subjects (p > 0.05). No statistically significant difference was observed in CDI, total and subscale SDQ scores between patients receiving levetiracetam or valproic acid during the study period (p > 0.05). A girl aged 15 years receiving levetiracetam had a CDI score of 18 without suicidal ideation at baseline. She developed suicidal ideation and depression, which resolved after switching of levetiracetam to valproic acid, at the 1-month follow-up. No other psychiatric or behavioral side-effects were observed in other patients. Conclusion Psychosocial and behavioral side-effects of levetiracetam treatment are not frequent and they don't emerge in most of children at lower doses. At this dose, and after 3 months, using these specific instruments, we did not observe any difference between the valproic acid and levetiracetam treatment groups. © 2017 Elsevier Inc.
  • Küçük Resim Yok
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    Investigations on a cell culture medium for storage and transportation of avulsed teeth
    (1999) Pohl Y.; Tekin U.; Boll M.; Filippi A.; Kirschner H.
    Non-physiologic storage of avulsed teeth leads to a high incidence of root resorption, resulting in poor prognosis. This study investigated the suitability of specially composed cell culture media for storage of extracted teeth for up to 48 hours. Autoradiographic investigations revealed that the proliferative activity of periodontal ligament (PDL) cells of teeth stored in cell culture medium for up to 48 hours increased with storage time. Studies on proliferation of PDL cells after storage of teeth in different media for up to 24 hours demonstrated that the proliferative activity is dependent on the composition of the medium. lmmunohistochemical investigations with markers for cell proliferation revealed that pulp cells of extracted immature teeth show numerous proliferations after storage for up to 24 hours in a special cell culture medium but few proliferations after storage in Hanks Balanced Salt Solution (HBSS). The investigations indicate that a special cell culture medium can preserve cell viability of PDL cells adhering to extracted teeth for at least 48 hours. The in vitro results are confirmed by a case presented: After storage of two upper central incisors for 36 hours in the cell culture medium the teeth could be successfully reimplanted after extraoral insertion of titanium posts into the root canal (auto-alloplastic reimplantation). Clinical and radiological follow-up examinations for I2 months revealed normal periodontal healing.
  • Küçük Resim Yok
    Öğe
    The outcome of apical microsurgery using MTA as the root-end filling material: 2- to 6-year follow-up study
    (Blackwell Publishing Ltd, 2016) Çalişkan M.K.; Tekin U.; Kaval M.E.; Solmaz M.C.
    Aim: To evaluate the influence of various predictors on the healing outcome 2-6 years after apical microsurgery (AMS) using MTA as the root-end filling material. Methodology: A total of 90 anterior teeth with asymptomatic persistent periradicular periodontitis of strictly endodontic origin that failed after either nonsurgical or surgical treatment were included. Surgery was completed under local anaesthesia using a standardized clinical protocol. Clinical and radiographic measures as well as the follow-up period were used to determine the healing outcome. For statistical analysis of the predictors, the outcome was dichotomized into healed cases and nonhealed cases. Odds ratios were calculated, and Pearson chi-square or Fisher's exact tests were used to analyse the data. Results: Clinical and radiographic assessment of AMS revealed that 80% were healed, 14.4% were nonhealed, whilst 5.6% were judged to be uncertain. None of the various predictors investigated had a significant influence on the outcome of AMS. Conclusions: The results of this clinical study demonstrated that 80% of cases that received apical microsurgery healed when using MTA as the root-end filling material. © 2016 International Endodontic Journal. Published by John Wiley & Sons Ltd.
  • Küçük Resim Yok
    Öğe
    Results and complications of alveolar distraction osteogenesis to enhance vertical bone height
    (Mosby Inc., 2008) Günbay T.; Koyuncu B.Ö.; Akay M.C.; Sipahi A.; Tekin U.
    Objective: The aim of this retrospective study was to analyze the outcome and complications of alveolar distraction osteogenesis for the correction of vertically deficient ridges by using intraosseous and extraosseous distractors. Study design: Seven patients with severely atrophic alveolar crests were treated by distraction osteogenesis in 5 alveolar ridge deficiencies by intraosseous distractors and in 2 alveolar ridge deficiencies by extraosseous distractors. The bone deficiencies were secondary to atrophy after periodontal disease, tooth extraction, or trauma. Three months after consolidation of the distracted segments, implants were placed in the distracted areas. The average follow-up period after prosthetic loading was 50 months. Results: The mean alveolar height achieved was 7.8 mm (range, 4-9 mm). The intraoperative and postoperative problems encountered were lack of device activation (n = 1), lingual displacement of the distracted segment (n = 1), paresthesia of the lower lip (n = 4), and dehiscence and plate exposure (n = 2). Most of these complications were considered to be minor complications and were solved without any problems. Conclusion: It was concluded that alveolar distraction osteogenesis seems to be an effective technique to treat vertical alveolar ridge deficiencies, but adequate treatment planning is necessary for success. The complications related to this technique can be solved with simple treatments. © 2008 Mosby, Inc. All rights reserved.
  • Küçük Resim Yok
    Öğe
    Ruptured pulmonary hydatid cyst and folded membrane on CT [1]
    (1992) Maden N.; Oyar O.; Tekin U.; Ozer H.
    [No abstract available]
  • Küçük Resim Yok
    Öğe
    Surgical extrusion of a partially erupted and crown dilacerated incisor
    (2008) Çalişkan M.K.; Tekin U.
    A case report of treatment for an incompletely erupted maxillary central incisor with crown dilaceration in a 12-year-old boy is described. The tooth was repositioned with surgical extrusion and endodontically treated through use of calcium hydroxide paste. Clinical and radiographic examination 2 years after completion of combined surgical and endodontic treatment revealed periapical healing and no signs of root resorption. © 2008 Blackwell Munksgaard.

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