49 research outputs found

    Reconstruction of cervical esophagus defectswith three different techniques

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    Servikal özafagus defektlerinin onarımı, rekonstrüktif cerrahinin en zor konularından biridir. Bu defektler hipofarinks tümörleri ve primer servikal özafagus tümörleri sonucu gelisir. Ideal rekonstrüksiyon yönteminin, onkolojik cerrahi ile aynı seansta yapılabilir, erken fonksiyon saglayabilir ve düsük morbidite oranına sahip bir teknik olması gereklidir. Bu çalısmada üç farklı teknikle servikal özafagus onarımları, literatür bilgileriyle birlikte ayrıntılı olarak sunulmustur. Olguların biri pektoralis major kas deri flebi, digeri deltopektoral fleple ve en son olgu da servikohumeral flep ve deri grefti ile rekonstrükte edilmistir. Olguların tümünde oral alımı erken dönemde saglanmıstır.Yutma fonksiyonun en erken zamanda saglanmasının, yöntem seçiminde temel belirleyici oldugunu düsünmekteyiz. Sonuç olarak bu çalısmada her ne kadar üç farklı yöntem, farklı cerrahların seçimi olarak sunulmus ise de, bu yöntemler kendi avantaj ve dezavantajlarına sahiptir. Deltopektoral flepde parsiyel nekroz gelismesi, servikohumeral flebin ise geciktirme islemine ihtiyaç duyması nedeniyle, sunulan yöntemler içinde pektoralis major kas deri flebi ile onarımdaha basarılı bunmustur.Reconstruction of defects of the cervical esophagus is one of the most difficult tasks in reconstructive surgery. These defects are generally seen after tumors of hypopharynx and cervical esophagus. The method of reconstruction, which will be selected, therefore, must be reliable, a one-stage procedure with minimal morbidity and one that restores function in the shortest time possible. In this article, we present our experience with three different techniques: the pectoralis major musculocutaneous flap, the deltopectoral flap and a combination of cervicohumeral flap and skin grafting. Oral feeding was established early in all cases.We are of the opinion that the time for swallowing ability after operation is the one of the most important factors in determining the technique chosen for reconstruction of defects of the cervical esophagus. In conclusion, although three different techniques were presented in this study according to the surgeons choice, each technique has its own advantages and disadvantages. Since the partial necrosis in deltopectoral flap and necessity of the delay process in cervicohumeral flap were complications of the techniques, pectoralis major myo-cutaneous flap may be accepted as a more suitable reconstruction technique

    Hypothyroidism in Children with Serous Otitis Media

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    Objective:In this study, we aimed to evaluate the co-existence and prevalence of hypothyroidism in patients with otitis media with effusion (OME) and to determine the possible relationship between OME and hypothyroidism.Methods:The subject group consisted of 46 paediatric patients (26 boys, 20 girls), ranging in age from 4 to 14 years (mean age±SD 7.78±2.86 years), who were treated in the department of otorhinolaryngology for OME; the control group composed of 30 healthy children (20 boys, 10 girls), ranging in age from 3 to 14 years (mean age±SD 7.20±2.86 years). Triiodothyronine (Free T3), thyroxin (free T4), and thyroid-stimulating hormone (TSH) values of 46 children who were treated for OME, in addition to 30 healthy children, were evaluated.Results:Seven patients (15.2%) in the OME group, and one patient (3.3%) in the control group had subclinical hypothyroidism marked only by serum TSH elevations. All of the children in this study, regardless of whether from the subject or control group, had normal serum free T3 and free T4 levels. There was no significant difference between subject and control groups (p>0.05).Conclusion:Although there was no statistically significant difference between subject and control groups in this study, further studies with larger patient groups are needed to investigate the role of hypothyroidism in the aetiology of OME

    Comparative radiopacity of bone graft materials

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    The aim of this study was to investigate the radiopacity of bone graft materials (BGMs) in comparison with bovine mandibular cortical bone and human dentine. Eight samples of each material (8 mm in diameter and 3 mm in thickness) were prepared from Dexabone (R) (DB), Bio - Oss (R) (BO), 4BONE SBS (4B), KASIOS (R) TCP (KA), S. C. PONETI (PO), and Apatite-Wollastonite (AW). The optical densities of each material, along with one tooth section (human canine tooth 1 mm slice), bovine mandibular cortical bone (BC) samples, and an aluminum step wedge, were measured from radiographic images using a transmission densitometer. The data were analyzed by nonparametric one-way ANOVA (Kruskal-Wallis) and Duncan's multiple range tests for post hoc comparison (alpha = 0.05). BC and AW had statistically lower optical density values than BO, 4B and human dentine (p 0.05). The radiopacity of all BGMs investigated seemed to be too low to be detected radiographically when placed in the mandibular cortical bone. (C) 2011 European Association for Cranio-Maxillo-Facial Surgery

    Ankaferd Blood Stopper Ile Güçlendirilmiş Plateletten Zengin Fibrin Membranin Deneysel Kemik Defektlerinde Yönlendirilmiş Doku Rejenerasyonu Üzerine Etkileri

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    Background and Aim: To evaluate the effects of AnkaferdBlood Stopper added platelet-rich fibrin administered incranial bone defects created in rabbits via histomorphometricassessment.Materials and Method: Four circular 5 mm defects werecreated in the crania of 16 New Zealand rabbits. Each defect ineach animal received one of four treatments: no treatment (ECgroup), platelet-rich fibrin administration (PRF group), AnkaferdBlood Stopper added platelet-rich fibrin administration(PRF ABS group) and collagen membrane administration (CMgroup). Histomorphometric assessment was conducted at 4and 8 weeks after surgery.Results: Between-group comparisons of the new bone arearevealed significant differences between the PRF ABS groupand the remaining three groups at 4 weeks. The new bonearea was significantly larger at 8 weeks than at 4 weeks in allgroups.Conclusion: The use of Ankaferd Blood Stopper in conjunctionwith platelet-rich fibrin improves bone healing, strengthens themembrane property of platelet-rich fibrin and promotes betterossification.Amaç: Ankaferd Blood Stopper ile güçlendirilmiş trombosittenzengin fibrinin tavşanlar üzerinde oluşturulan kalvaryal kemikdefektleri üzerindeki etkilerinin histomorfometrik yöntemler iledeğerlendirmek.Gereç ve Yöntem: 16 Yeni Zelanda tavşanı kafatasında, dörderadet 5 mm çapında dairesel kemik defekti oluşturuldu. Her birhayvandaki dört farklı defekt bölgesine, dört farklı tedavidenbiri uygulandı: tedavi yok (EC grubu), trombositten zengin fibrinuygulaması (PRF grubu), Ankaferd Blood Stopper ile berabertrombositten zengin fibrin uygulaması (PRF ABS grubu) vekolajen membran uygulaması (CM grubu). Histomorfometrikdeğerlendirme cerrahiden 4 ve 8 hafta sonra yapıldı.Bulgular: Yeni kemik alanının gruplar arası karşılaştırmalarında,4.hafta örneklerinde PRF ABS grubu ile kalan üç grup arasındaanlamlı fark olduğu görüldü. Yeni kemik alanının, tüm gruplarda8.hafta örneklerinde, 4.hafta örneklerine göre anlamlı derecedeyüksek olduğu görüldü.Sonuç: Ankaferd Blood Stopper’ın trombositten zenginfibrin ile birlikte kullanılması; kemik iyileşmesini arttırmakta,trombositten zengin fibrinin membran özelliğini güçlendirmekteve daha iyi bir kemikleşme sağlamaktadır

    Social network analysis in university education

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    Sosyal ağ analizi, modern yazılımlar sayesinde bireylerin ilişkilerini sayısallaştırarak bu ilişkilerin boyutlarına dair bilimsel veriler sunmaktadır. Sosyal ağlar, günümüzde öğrenme öğretme alanında da yaygınlaşmıştır. Ağ analizinin farklı birim ve düzeydeki nesnelerin karşılaştırılmasını ve analiz edilmesini kolaylaştıran bir unsur olması, önemini daha da artırmıştır. Üniversitelerde verilen eğitimde, video, ses, resim gibi ders materyallerinin sosyal ağ üzerinden yayınlanması, bilginin daha kalıcı ve ulaşılabilir hale gelmesini sağlamaktadır.Bu çalışmanın amacı, sosyal ağların eğitim alanında önemini ortaya çıkarmaktır. Öğrencilerin sosyal alanlardaki birbiri ile olan ilişkilerinin üniversite eğitimine katkısının tespiti sosyal ağ analizi ile yapılmıştır. Bu amaç doğrultusunda sosyal medya analizi, sosyal ağ analizi, ağ birimi, kullanılan sosyal ağlar, istatistikler, sosyal ağ analizinin temel özellikleri açıklanmıştır. Son olarak yapılan anketler ve elde edilen istatistikler incelendiğinde sosyal medya ile eğitimin desteklenmesi sayesinde öğrenciler için öğrenmenin kolaylaştığı ve zaman probleminin önemli ölçüde çözüldüğü tespit edilmiştir.Social network analysis digitizes the relationships of individuals through modern software and provides scientific data on the dimensions of these relationships. Social networks have become widespread in the field of learning and teaching. The fact that network analysis is such a widespread factor stems from the fact that it is an approach that allows the comparison and analysis of actors at different units and levels. In the education given in the universities, the publication of course materials such as video, audio and painting through social network enables the information to become more permanent and accessible. The aim of this study is to reveal the importance of social networks in the field of education. The contribution of students' relations with each other in social fields in university education was made through social network analysis. For this purpose, social media analysis, social network analysis, network unit, used social networks, statistics, basic features of social network analysis are explained. Finally, when the surveys and the statistics obtained were examined, it was found that learning was facilitated, and the time problem disappeared through the support of education with social media
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