Mechanical design and analysis of a novel fixation device for human bone fractures

Yenigün, Çağrı
Fixation of bone fractures over a desired time period is one of the most important requirement for their healing processes. Fracture fixation devices are designed to satisfy particular requirements for different types of bone fractures. Conventional and locking plates, intramedullary rods and screws of trauma surgery, and polyaxial screws, connectors and rods of spinal surgery are the examples of contemporary implants for varying bones and their fractures. The mentioned fixation system is inspired from spinal implants and contains multi-axial screws, adjustable rod connectors and rods to combine the known advantages and reduce disadvantages of known systems used in shaft fractures of trauma surgery. The aim of this thesis is to design and prototype an internal fixation system that is anatomically suitable for intended area application, minimizing periosteum damage, allowing multi-axial screws and multi-planar application for traumatic and osteotomic applications, as a part of an interdisciplinary project. For this purpose, several preliminary models and resulting final models are designed, and the critical points of conceptual and final models are evaluated by analytical methods. Consequently, mechanical tests are conducted to assess the performance of the final design, and results of these tests compared with analytical estimations. Finally, suitable areas of application in orthopaedics are concluded based on the assessments.


Design of a modular orthopedic implant
Erkan, Onur Mert; Tönük, Ergin; Department of Mechanical Engineering (2015)
Bone fracture due to trauma and bone defects by birth are very common in orthopedics, making their treatment crucial. In this study, a novel design to treat upper arm fractures is introduced and assessed mechanically. The design offers medical doctors longitudinal and angular flexibility when compared to widely used orthopedic plates. Hence the new design covers a variety of fracture types. Earlier conceptual designs are reviewed to demonstrate the progress of design. Mechanical performance of the final des...
Vibration measurements predict the mechanical properties of human tibia
Bediz, Bekir; Özgüven, Hasan Nevzat; Korkusuz, Feza (Elsevier BV, 2010-05-01)
Background: Vibration analysis is a promising technique in diagnosing metabolic bone diseases such as osteoporosis and monitoring fracture healing. The aim of this study is to observe the structural dynamic property changes of the tibia extracted from the vibration analysis data.
Biodegradable hydroxyapatite - Polymer composites
Durucan, Caner (2001-04-01)
The fracture of bone due to trauma or due to natural aging is one of the most frequent types of tissue failures. Treatment frequently requires the implantation of ct temporary or permanent prosthesis. The implanted materials may include the components of artificial joints, plates, and screws for fracture fixation. Typically, such implants are intended only to provide structural support or to serve as templates for bone re-growth. In general they are intended to remain in place for the life of the patient or...
Etiology of senile osteoporosis - A hypothesis
Atik, O. Sahap; Uslu, M. Murad; Eksioglu, Fatih; Satana, Tolgay (Ovid Technologies (Wolters Kluwer Health), 2006-02-01)
Osteoporosis is a major health problem characterized by compromised bone strength predisposing patients to an increased risk of fracture. It may cause morbidity and mortality in elderly men and women. The etiologic factors that lead to senile osteoporosis still are unclear.
Development of a siRNA delivery system for the treatment of osteoporosis
Sezlev Bilecen, Deniz; Hasırcı, Vasıf Nejat; Uludağ, Hasan; Department of Biotechnology (2018)
Osteoporosis, the most common disease of bone, is a skeletal disorder associated with low bone mass, increase in bone fragility and in susceptibility to fractures. The high bone resorption rate is shown to be due to increased number and activity of the osteoclasts. Receptor Activator of Nuclear Factor kappa B (RANK)/ Receptor Activator of Nuclear Factor kappa B Ligand (RANKL) system plays a crucial role in osteoclast differentiation and bone remodeling. RANKL participates in differentiation and activation o...
Citation Formats
Ç. Yenigün, “Mechanical design and analysis of a novel fixation device for human bone fractures,” M.S. - Master of Science, Middle East Technical University, 2016.