Biomechanics & Biomaterials MCQs

Which of the following geometric structural properties most directly dictates a long bone's resistance to bending forces?

In the evaluation of orthopedic biomaterials, the total area under the stress-strain curve up to the point of structural failure represents which of the following mechanical properties?

A retrieved modular total hip arthroplasty demonstrates significant black macroscopic debris and surface damage at the head-neck taper junction. Which type of corrosion is most likely responsible for this specific damage pattern?

When normal articular cartilage is subjected to a constant compressive load over time, it undergoes a gradual increase in deformation until it reaches an equilibrium state. This viscoelastic property is best described as:

A clinician applies a dynamic splint to a patient's contracted elbow. The splint applies a constant load over time, resulting in gradually increasing extension of the soft tissues. This phenomenon is best described by which of the following viscoelastic principles?

Increasing the radius of a solid circular intramedullary nail by a factor of 2 will increase its torsional rigidity by a factor of:

Stress shielding around an orthopedic implant is strongly influenced by the elastic modulus of the material. Which of the following metals has an elastic modulus closest to that of cortical bone?

When attempting to revise a fracture construct, a surgeon notices significant black debris and corrosion where a stainless steel screw was placed through a titanium plate. This is an example of which type of corrosion?

On a standard stress-strain curve for an orthopedic implant material, the total area under the curve up to the point of failure represents which of the following biomechanical properties?

When a constant, prolonged compressive load is applied to articular cartilage, the tissue slowly continues to deform until it reaches an equilibrium state. This specific viscoelastic property is best described as:

During an open reduction and internal fixation, an orthopedic surgeon inadvertently uses a titanium screw through a stainless steel plate. This mismatched metal combination primarily increases the risk of which type of implant corrosion?

When evaluating the biomechanics of a cortical screw, which of the following alterations to the screw's design will most significantly increase its pullout strength?

Mixing stainless steel and titanium implants within the same surgical construct should generally be avoided primarily due to the increased risk of which of the following processes?

A physical therapist applies a constant load to a patient's contracted knee joint, resulting in a gradual increase in deformation of the periarticular soft tissues over time. Which viscoelastic property does this phenomenon describe?

When evaluating the material properties of an orthopedic implant on a load-deformation curve, the stiffness of the material is represented by which of the following parameters?

Highly cross-linked polyethylene was introduced to drastically reduce wear rates in total joint arthroplasty. Which of the following thermal processing steps is specifically performed to eliminate residual free radicals, but results in a slight decrease in the material's mechanical yield strength?

Mechanically assisted crevice corrosion (MACC), or trunnionosis, is most frequently associated with which of the following total hip arthroplasty component combinations?