Yazar "Tekdemir, Ibrahim" seçeneğine göre listele
Listeleniyor 1 - 7 / 7
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Cadaver analysis of thoracic outlet anomalies(Ekin Tibbi Yayincilik Ltd Sti-Ekin Medical Publ, 2011) Tokat, Arif Osman; Atinkaya, Cansel; Esmer, Ali Firat; Apaydin, Nihal; Tekdemir, Ibrahim; Gungor, AdemBackground: This study aims to determinate the rate of thoracic outlet anomalies by means of analysis of cadavers. Methods: Supraclavicular incisions were applied by two anatomists and two thoracic surgeons in the thoracocervicoaxillary region of both extremities (n=40) in twenty cadavers (7 females, 13 males; mean age 46). The formation and type of fibrous bands, cervical ribs, C7 long transverse processes and anomalies of the clavicles, scalenus anterior and scalenus medius muscles, brachial plexus, subclavian arteries and veins were evaluated. The type and formation of fibrous bands were classified using Roos' classification. Results: Anomalies were found in 34 (85%) of extremities. The type 3-band was most frequently (15%) observed and all of them were on the right extremity. The type 4-band was rarely seen (2.5%). Two bands (type 9 and type 11) in the same extremity were notified in one cadaver. (2.5%). The occurrence rate of cervical rib and C7 long transverse process was 10%. Some fibers of m. scalenus medius emerged from a cervical rib in one extremity (2.5%). The arteria subclavia anterior passed through the scalene muscle in three extremities (7.5%). In 10% of extremities the C5 truncus passing through the anterior scalene muscle and upper truncus of brachial plexus passing anterior scalene muscle via perforation was found in 7.5% of patients. Conclusion: In our population, brachial plexus and subclavian artery variations are frequently observed. Therefore these types of anomalies should be taken into consideration to prevent morbidity and complications when muscle division or blockage applications are performed.Öğe Comparison of two techniques in achieving planned correction angles in femoral subtrochanteric derotation osteotomy(Lippincott Williams & Wilkins, 2012) Turker, Mehmet; Cirpar, Meric; Cetik, Ozgur; Senyucel, Cagri; Tekdemir, Ibrahim; Yalcinozan, MehmetIncreased femoral anteversion in cerebral palsy alters biomechanics of gait. Femoral subtrochanteric derotational osteotomies are increasingly performed to improve gait in cerebral palsy. The amount of angular correction can be determined and planned preoperatively but, accuracy in achieving planned angular correction has not been tested experimentally before. The aim of this study was to evaluate the accuracy of the two techniques in achieving planned angular correction. Sixteen dry femora were used in this study. Specimens in both groups were derotated to achieve a desired amount of correction with two different techniques, consecutively. In technique one, the cross section of the femur was assumed to be circular and the desired amount of angular correction was calculated and expressed in terms of surface distance by a geometric formula (surface distance = 2 x pi x radius of femur). In both groups, derotations were made based on this surface distance calculation. Consecutively the same specimens were derotated by pins and guide technique. Femoral anteversion of specimens were measured before and after derotation by computerized tomography. There was a statistically significant differance in planned and achieved correction angles (P = 0.038) in both subgroups derotated by the surface distance technique. When the two techniques were compared, there was significant difference (P = 0.050) between high magnitude correction subgroups (subgroups 2 vs. 4). In conclusion, the results of this study highlighted the difficulty in achieving accurate derotation angles. Derotations based on guide-pins technique yielded more accurate results than derotations based on surface distance technique. In addition, surface diameter technique was not suitable when higher degrees of derotations are needed. In achieving a planned derotation angle two techniques are described for accuracy. Both the techniques have potential pitfalls resulting in malrotations. Surgeons must be aware of these obstacles and try to avoid them. J Pediatr Orthop B 21: 215-219 (C) 2012 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins.Öğe Intranasal Extramucosal Access: A New Access for Lateral Osteotomy in Open Rhinoplasty(Lippincott Williams & Wilkins, 2016) Tellioglu, Ali Teoman; Sari, Elif; Ozakpinar, Hulda Rifat; Eryilmaz, Tolga; Inozu, Emre; Sen, Tulin; Tekdemir, IbrahimBackground and Objective: Different accesses have been used to perform lateral osteotomies in rhinoplasty. All of them have some disadvantages. The aim of this paper was to report a new access to overcome drawbacks of the other techniques in lateral osteotomy during open rhinoplasty. Methods: An anatomical study was designed to search possibility of intranasal extramucosal access (open sky access) for the lateral osteotomy in open rhinoplasty. It was performed directly on the lateral wall of piriform aperture, and then possible advantages of this technique were investigated. Five fixed cadavers were used for this purpose. No drawbacks were observed during procedure in cadavers. Then the same procedure was performed in 23 consecutive rhinoplasty patients. Nineteen operations were primary and 4 operations were secondary. Median oblique osteotomies were added to the procedure in all patients. The mean follow-up was 17 months. Results: Intranasal extramucosal access during lateral osteotomy was easily performed in all patients. Hemorrhage due to angular vessel injury was not occurred during intraoperative period. Edema and ecchymosis was minimal. Intranasal examination did not show any sign for nasal mucosal tearing in all patients. Residual bone spurs or bone irregularities were not observed in any patients. Conclusion: Intranasal extramucosal access that produces precise, predictable, and reproducible aesthetic and functional results could also provide better exposure during lateral osteotomy. Additionally, open sky access minimizes scars because it does not need additional incisions on the skin and mucosa. Protection of the internal periosteum of the nasal bones may be the main advantages of this technique.Öğe Is there a safe area for the axillary nerve in the deltoid muscle? A cadaveric study(Journal Bone Joint Surgery Inc, 2006) Çetik, Özgür; Uslu, Murad; Acar, Halil Ibrahim; Cömert, Ayhan; Tekdemir, Ibrahim; Çift, HakanBackground: Several authors have defined a variety of so-called safe zones for deltoid-splitting incisions. The first aim of the present study was to investigate the distance of the axillary nerve from the acromion and its relation to arm length. The second aim was to identify a safe area for the axillary nerve during surgical dissection of the deltoid muscle. Methods: Twenty-four shoulders of embalmed adult cadavers were included in the study. The distance from the anterior edge of the acromion to the course of the axillary nerve was measured and was recorded as the anterior distance. The same measurement from the posterior edge of the acromion to the course of the axillary nerve was made and was recorded as the posterior distance for each limb. Correlation analysis was performed between the arm length and the anterior distance and the posterior distance for each limb. The ratios between arm length and the anterior and posterior distances were calculated for each case and were recorded as an anterior index and a posterior index. Results: The average arm length was 30.40 cm. The average anterior distance was 6.08 cm, and the average posterior distance was 4.87 cm. There was a significant correlation between arm length and both anterior distance (r = 0.79, p < 0.001) and posterior distance (r = 0.61, p = 0.001). The axillary nerve was not found to lie at a constant distance from the acromion at every point along its course. The average anterior index was 0.20, and the average posterior index was 0.16. Conclusions: The present study describes a safe area above the axillary nerve that is quadrangular in shape, with the length of the lateral edges being dependent on the individual's arm length. Using this safe area should provide a safe exposure for the axillary nerve during shoulder operations.Öğe Maxilla allograft for transplantation - An anatomical study(Lippincott Williams & Wilkins, 2008) Yazici, Ilker; Cavusoglu, Tarik; Comert, Ayhan; Vargel, Ibrahim; Cavusoglu, Mehtap; Tekdemir, Ibrahim; Siemionow, MariaIntroduction: The aim of this study is to present an anatomic study and a dissection technique to, prepare maxilla graft for transplantation. Methods: Six fixed adult human cadavers were used for dissection of the maxilla grafts. Retrospective reviews of archives of 10 MRI and 5 angiographies of the maxillary region were performed to demonstrate the vascular and soft tissue anatomy of this area. Results: We have harvested maxilla graft as a single unit (larger type of Le Fort II) based on arterial and venous pedicle ready for transplantation. MRI evaluation revealed the vascular structures in the masticatory space and its anterior pterygomaxillary extension. Angiographic observations have demonstrated the arterial blood supply of the maxillary region, which lies within the pterygomaxillary region that we have included in the graft. Conclusions: We are presenting a method for harvesting of the maxilla graft, with vascular supply based on certain anatomic landmarks.Öğe Superficial palmar communications between the ulnar and median nerves in Turkish cadavers(Wiley, 2007) Tagil, Süleyman Murat; Bozkurt, Mehmet Cem; Özcakar, Levent; Ersoy, Mehmet; Tekdemir, Ibrahim; Elhan, AlaittinThe superficial palmar communicating branch between the ulnar and median nerves, the ramus communicans (RC), has been investigated by anatomical dissections in 30 hands of 15 cadavers in the Turkish population. A communicating branch between the ulnar and median nerves was found in 18 hands (60%). It was classified into 4 types: Type 1-RC emerging from the ulnar 4th common digital nerve (CDN) and uniting with the median 3rd CDN, Type 2-RC emerging from the median 3rd CDN and uniting with the ulnar 4th CDN, Type 3-RC extending horizontally between the 3rd and 4th CDN, Type 4-a plexiform RC formed by multiple twigs. Twelve hands (40%) showed the Type 1 arrangement, one was Type 2 (3.3%), two were Type 3 (6.7%) and three (10%) were Type 4, based on the classification devised by Meals and Shaner ([1983] 3 Hand Surg Am 8:411-414) and modified by Bas and Kleinert ([1999] 3 Hand Surg Am 24:1171-1184). Knowledge of the anatomical characteristics of this branch is important for surgical interventions, especially in carpal tunnel release operations.Öğe The Use of Computed Tomography to Determine Femoral Component Size A Study of Cadaver Femora(J Michael Ryan Publishing Inc, 2005) Uslu, Murad; Ozsar, Baris; Kendi, Tuba; Kara, Simay; Tekdemir, Ibrahim; Atik, O. SahapComputed tomography is used to assess whether ideal femoral component size in knee arthroplasty can be made more accurately. Ideal femoral component size was measured on radiography, computed tomography, and by direct measurement of 20 cadaver femora and analyzed statistically. There was no significance between the tomographically anticipated ideal femoral component size and ideal femoral size values (Wilcoxon W 388.5; p 0.565). There was difference between radiographically anticipated ideal femoral size and ideal femoral size values (Wilcoxon W 324.5; p 0.020). Anticipating the ideal femoral size can be made more precisely with computed tomography than radiographs in cadaver femora. Anticipating the ideal femoral component size by computed tomography may solve the problems in in-between sizes. Future total knee designs may be manufactured in more anatomic sizes.
