Objective: Despite several surgical options, there has yet to be a consensus on the best treatment for femoral neck fracture (FNF) due to higher complication rates compared to other bone fractures. This study aims to examine the possible consequences and solution suggestions of changing screws during surgery for various reasons in FNF surgical treatment from a biomechanical perspective.Method: FNF and treatment materials were analyzed biomechanically using a package program based on the finite element method (FEM). This study created a solid model with images of femur bone tomography. Dynamic hip screws (DHS), cannulated screws (CCS), and medial buttress plates (MBP) were obtained by making three‐dimensional designs. The required elements for the models were assigned, and the material properties of the elements were defined. The solutions were obtained as crack distance and deformation results after defining the boundary conditions and applying the necessary loading.Results: The strain and crack distance values created by six models on the fracture line under different parameters were obtained, and the numerical results were evaluated. The DHS and CCS models produced the highest crack distance and deformation values when all screws were loose. The lowest values were obtained in the intact‐85 model when all CCS were tight. When the results are evaluated, it is seen that the MBP has a decreasing effect on the results. Mechanical evaluation of six different options used in femoral neck fractures was performed. 85 mm CCS applied to our standard model gave the best results, while the use of 80 mm CCS in the same model showed promising results compared to other models. It is understood that CCS have the best stability even in loosening models with the medial support plate. Different models are from intact‐85 mm DHS+1CS+MBP to DHS+1CS, which was worked with LSR+USR‐2, according to decreasing stability.Conclusion: This study offers various biomechanical solutions to possible intraoperative problems in FNF treatment. The following results were obtained from the study data. When the CCS needs to be lengthened or replaced, it is appropriate to use the CCS with the MBP. A single anti‐rotation screw is sufficient for lag screw extensions of the DHS plate, and the MBP may be a savior procedure in surgery.

This study offers a comparative study of the analytical and numerical methods for investigating a contact problem. The contact problem comprises a functionally graded layer supported by a half‐plane and loaded with a distributed load from the top surface. First, the analytical and numerical solutions to the problem are acquired by utilizing a theory of elasticity and finite element method, respectively. The problem is transformed into a system of integral equations in which the contact stress is an unknown function. The solution of the integral equation was achieved with Gauss–Jacobi integration formulation. The finite element model of the problem is created using ANSYS software, and the two‐dimensional analysis of the problem is performed. Results were obtained from the samples for different material properties and loading conditions. The distributed load width and non‐homogeneity parameters significantly impact on contact mechanics. The results indicate that the contact area and the contact stress obtained from finite element method (FEM) are close to the analytical results. As a result, acceptable error rates were obtained. Finally, this study provides evidence of a good agreement between the two methods.

Bu çalışmada yeni hizmete alınan bir kamu idari hizmet binasının mühendislik özellikleri biyoharmoloji bilimi kapsamında incelenmiş ve Biyoharmolojik Uygunluk Değeri (BUD) belirlenmiştir. Binanın incelemesi 26-27 Mart 2018 tarihlerinde yapılmıştır. Bina incelemesinde toplam 14 mühendislik özellikleri ve kriterleri ele alınmıştır. Yapılan BUD inceleme çalışması sonucunda daha yeni tamamlanan ve hizmete alınan binanın “İyileştirilmeli” sınıfında ve minör değişikliklere ihtiyacı olduğu anlaşılmıştır. Binanın BUD puanı ~434 olarak hesaplanmıştır. Ayrıca binanın eksiklik ve yetersizlik değeri %32'dir. Binada belirlenen en zayıf ilk üç mühendislik özellik “Mekanik Sistem”, “Tefrişat ve Düzenleme” ve “Aydınlatma” şeklindedir. Diğer taraftan binanın en iyi ilk üç mühendislik özelliği ise “Taşıyıcı Elemanlar”, “Sismoloji” ve “Kullanıcı Kimliği”dir.