Arab Orthopaedic Board MCQs - Part 11

Spontaneous resolution of asymptomatic osteonecrosis of the femoral head was found to be associated with:

A seventy-year-old woman fell on her outstretched left hand and sustained an extraarticular fracture of the distal part of the radius. Using local anesthesia, you perform a successful, anatomical reduction and immobilize the fracture in a plaster cast. Under what circumstance would you perform a Kirschner wire osteosynthesis?

Regarding Legg-Calvé-Perthes disease and thrombosis, which of the following statements is correct?

A fifty-year-old woman presented with pain and tenderness at the radial styloid of the left wrist of one month’s duration. The pain was aggravated when the thumb was clasped in the palm and the wrist was forced into ulnar deviation. A diagnosis of de Quervain disease was made. The most effective initial treatment of this condition was found to be:

Which branch of the axillary nerve lies closest to the inferior portion of the glenoid rim and is therefore most vulnerable to damage during surgery involving the inferior aspect of the shoulder capsule?

Demineralized bone matrix contains all of the following except:

The elbow has both static and dynamic stabilizers against valgus torque. Muscle- splitting approaches to the medial aspect of the elbow have been developed to help maintain the dynamic stabilizing function of the flexor pronator mass when the medial ulnar collateral ligament is being reconstructed. On the basis of biomechanical studies, which structures are the primary static and dynamic stabilizers, respectively?

All of the following patients might be reasonable candidates for a proximal femoral valgus-producing intertrochanteric osteotomy, EXCEPT:

The optimal method for diagnosing osteonecrosis in asymptomatic patients is:

Which of the following represents the most likely change in the gap detection threshold six weeks after a carpal tunnel release?

Which of the following factors is the most important when selecting a patient with high-grade metaphyseal osteosarcoma of the knee for a partial epiphyseal preservation?

The major disadvantage of the technique of lengthening of long bones over an intramedullary nail is:

Rotator cuff repair in patients fifty years of age and younger is associated with long term improvement in which of the following clinical parameters?

If an os acromiale is obscured on the optimal single radiographic view, it can be detected on which of the following combinations of radiographic views of the shoulder?

The factor most likely to be associated with a poor long-term outcome following proximal row carpectomy is:

Which of the following molecules is a marker of chondrocyte dedifferentiation following human autologous chondrocyte transplantation?

Which of the following factors is the main reason for loss of elbow and forearm strength following radial head resection because of a comminuted fracture of the radial head?

Which of the following medications, when given intra-articularly, has been shown to be most effective in reducing postoperative pain following anterior cruciate ligament reconstruction?

Which of the following restrictions was found to be the most important in preventing early dislocation following total hip arthroplasty?

When patients with lower-extremity sarcoma were treated with limb-salvage surgery combined with high-dose postoperative external beam radiation therapy, they were noted to have:

You make a diagnosis of posterior dislocation of the shoulder in a male patient within twenty-four hours after the injury. Radiographs show a small humeral head defect. All of the following statements are true, except:

Which of the following is considered to be the gold-standard suturing technique for meniscal repair?

Following total hip arthroplasty with a metalon-metal articulation, hypersensitivity reactions to wear and repassivation products may develop in some patients. If hypersensitivity is established as the cause of bursa formation, pain, or bone resorption, a surgeon should consider:

Which factor is least associated with patient satisfaction following surgical repair of the rotator cuff?

When liquid gentamicin is added to cement, all but one of the following statements are true:

The effect of bisphosphonates in patients undergoing total hip and knee arthroplasty is best described as follows:

When a young patient with “cam-type” femoroacetabular impingement is treated with surgical resection of the head-neck junction, how much bone can be safely resected without significantly weakening the femoral neck?

In a comparison of computed tomography and plain radiography for the assessment of periacetabular osteolysis following total hip arthroplasty, it was found that computed tomography has:

hormone produces which of the following effects:

All of the following are associated with a significantly increased risk of deep infection in patients with an orthopaedic oncological condition except:

Extracorporeal shock wave therapy used to treat chronic lateral epicondylitis resulted in significant improvement in all of the following outcome end points except:

A review of 121 ankle fractures treated with open reduction and internal fixation revealed that 21% of the patients were symptomatic as a result of a surgical injury to which nerve?

Hip arthroscopy can be performed with the patient in either the supine or the lateral decubitus position. An advantage of the lateral position is that:

In patients with metal-on-metal bearing hip prostheses:

Following the diagnosis of deep periprosthetic infection in a patient who was treated for an orthopaedic oncological condition, which treatment yields the best functional outcome and probability of eradicating the infection?

A diagnosis of pigmented villonodular synovitis of the hip can be made with magnetic resonance imaging. Which of the following findings is least consistent with this diagnosis?

Which of the following factors decreases the likelihood of success of bracing for an adolescent with idiopathic scoliosis?

Acetabular chondral injuries are graded according to severity, and they influence surgical outcome. These lesions most often:

Eradication of bacteria is most difficult in which region of the foot?

At a minimum of ten years following unicompartmental knee arthroplasty, the most frequent cause of failure was found to be:

After treatment of a distal tibial metaphyseal fracture with an intramedullary nail, which of the following is most predictive of a poorer outcome as determined by the Musculoskeletal Function Assessment Outcomes Instrument?

Which of the following is the best combination of tests for diagnosing a full-thickness rotator cuff tear?

In a study of patients with adolescent idiopathic scoliosis, which of the following was found to be associated with the greatest adverse effect on pulmonary function?

Metal-on-metal articulation has been used as a bearing surface in total hip arthroplasty. Which of the following statements is correct?

When performing total knee arthroplasty, the orthopaedic surgeon must decide whether or not to resurface the patella. Which of the following statements is most consistent with the results found in a recent meta-analysis?

Which of the following is the most important factor in predicting the future extent of pelvic osteolysis adjacent to a cementless acetabular cup?

A seventy-four-year-old woman who lives independently sustained a displaced femoral neck fracture after a simple fall at the golf course. She has mild hypertension but is otherwise healthy. If you perform internal fixation rather than a total hip replacement, which of the following outcome measures would be most likely?

In a study comparing treatment with external fixation with treatment with an elastic stable intramedullary nail in children who sustained a tibial fracture, the children who had the latter procedure were found to have:

Which of the following is the most important factor in the evaluation of peroneal tendon pathology with diagnostic ultrasound?

Following triple arthrodesis, additional procedures are sometimes needed to fully correct acquired adult flatfoot deformity. Which of the following adjunctive procedures would help correct residual forefoot varus?