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  • Küçük Resim
    Öğe
    Biomechanical comparison of fixation of two-part osteoporotic neck fracture of the proximal humerus using uni-planar and multi-planar Kirschner wire
    (2009) Esen, Erdinç; Doğramacı, Yunus; Kömürcü, Mahmut; Kanatlı, Ulunay; Bölükbaşı, Selçuk; Atahan, Ali Osman
    Objectives: The stability and effectiveness of uni-planar Kirschner wire (K-wires) was compared to multi-planar K-wires osteosynthesis combined with tension band wiring for fixation of two-part osteoporotic surgical neck fracture of the proximal humerus. Materials and methods: Two groups each with eight cadaveric elderly (mean age 72.6; range 70 to 80 year) frozen human humeri were used in the study. Transverse osteotomy of the proximal humerus was performed using a thin oscillating saw. The first group (group A) was fixed using two anterograde smooth K-wires, sent from lateral cortex, combined with tension band wiring. The second group (group B) was fixed using multi-planar (anterograde and retrograde) four smooth K-wires combined with tension band wiring on the lateral cortex. Biomechanical tensile properties for 3 mm displacement (gap load) and maximum load were assessed. Results: The mean value for the gap load was 1045.0±45.4 N (Newton) for group A and 1238.1±115.8 N for group B. Gap load values of groups were similar (p=0.01). The maximum load was 1261.8±52.4 N in group A and 1471.1±107.3 N in group B. The maximum load values were statistically higher in the multiplanar fixation technique (group B) when compared to that of the uniplanar fixation technique (group A), (p=0.004). Conclusion: Fixation in osteoporotic two-part surgical neck fractures of the proximal humerus using multiplanar K-wires combined with tension band wire provides substantially more effective stability compared to that of uniplanar fixation.
  • Küçük Resim
    Öğe
    Double plate osteosynthesis provides better biomechanical stabilization than double tension band technique in distal humerus fractures
    (2010) Doğramacı, Yunus; Esen, Erdinç; Kürklü, Mustafa; Kırıcı, Yalçın; Atahan, Ali Osman; Kömürcü, Mahmut
    Objectives: In this study we evaluated the stability and effectiveness of the double tension band osteosynthesis technique compared to the double plate osteosynthesis technique used for fixation of distal humerus fractures. Materials and methods: The study was performed on two groups, and in each group eight cadaveric, elderly (mean age 70-80) human humeri was used. An osteotomy was performed in the supracondylar region using a manual saw. The first group (group 1) was fixed with double 3.5 mm reconstruction plates, while the second group (group 2) was fixed with the double tension band technique, using crossing Kirschner wires. The osteotomy was designed so that the distal fragment would allow only a single screw per plate. The constructs were evaluated using a material testing machine. A linear non-cyclic load was applied until the failure of the constructs. The force which produced a 3 mm gap (3 mm gap strength), as detected visually with the aid of operating loupes, and the maximum load prior to failure of the fixation (maximum force) were measured from all tests. Results: The mean value for the 3 mm gap strength was 1356.29±226.97 N for group 1 and 882.63±305.21 N for group 2. The mean value of the maximum load strength was 1487.13±298 N for group 1 and 1232±107.62 N for group 2. There were significant differences in 3 mm gap strengths of the two groups (p=0.005). There was also a significant difference in the maximum load between the two groups (p=0.016). Conclusion: Double plate osteosynthesis technique is superior to double tension band osteosynthesis for the fixation of distal humerus fractures.
  • [ N/A ]
    Öğe
    Efect of Ankaferd Blood Stopper on muscle healing
    (The Canadian Society for Clinical Investigation, 2016) Uygun, Murat; Yavuz, Osman Y.; Uraş, Ismail; Duman, Ibrahim G.; Haltaş, Hacer; Kömürcü, Mahmut
    Purpose: Ankaferd Blood Stopper (ABS), which is a standardized mixture of herbal extracts obtained from fve plants, has been proven as an efcient hemostatic agent and is still used in emergency situations. It is not known exactly if decreased bleeding has positive or negative efects on muscle healing and fbrosis, so the purpose of this study was to test the efect of ABS on muscle healing and morphology.Methods: A total of 66 outbred Wistar rats were divided into three control and three experimental subgroups. In the experimental groups, ABS was sprayed on the cut surface of the soleus. In the control groups, a saline solution was sprayed on the cut surface of the soleus. Subgroups were euthanized afer 2 weeks, 3 weeks and 4 weeks, respectively. In each subgroup, eight rats were used for the biomechanical study to determine muscle healing and three rats were used for the histopathological investigation.Results: Although muscle strength in the control groups was lower than that of the experimental groups in early weeks, no diferences were found between the control and the experimental groups at 4 weeks.Conclusions: ABS has no negative efect on muscle healing. We also observed that ABS accelerated muscle healing compared to the control group. ABS could be used in hemostasis of open fractures and elective orthopedic surgeries. © 2016. CIM