Bones Of The Forearm- Radius

BONES OF THE FOREARM- RADIUS

Q. 1

Regarding: Colles fracture
 
Assertion: Colles fracture occur mainly in women at the proximal end of radius at its cortico cancellous junction.
 
Reason: It is common in women because of postmenopausal osteoporosis.
 A

Both Assertion and Reason are true, and Reason is the correct explanation for Assertion

 B

Both Assertion and Reason are true, and Reason is not the correct explanation for Assertion

 C

Assertion is true, but Reason is false

 D

Assertion is false, but Reason is true

Q. 1

Regarding: Colles fracture
 
Assertion: Colles fracture occur mainly in women at the proximal end of radius at its cortico cancellous junction.
 
Reason: It is common in women because of postmenopausal osteoporosis.
 A

Both Assertion and Reason are true, and Reason is the correct explanation for Assertion

 B

Both Assertion and Reason are true, and Reason is not the correct explanation for Assertion

 C

Assertion is true, but Reason is false

 D

Assertion is false, but Reason is true

Ans. D

Explanation:

Colles fracture is a fracture at the distal end of radius at its cortico cancellous junction. It is the commonest fracture in women above 40 years of age because of postmenopausal osteoporosis.

Ref: Essentials of Orthopedics By Maheswari, 3rd Edition, Page 93

 


Q. 2

The forcible separation of the head of the radius from the capitulum of the humerus is mainly prevented by the?

 A

Articular capsule

 B

Annular ligament

 C

Quadrate ligament

 D

Radial collateral ligament

Q. 2

The forcible separation of the head of the radius from the capitulum of the humerus is mainly prevented by the?

 A

Articular capsule

 B

Annular ligament

 C

Quadrate ligament

 D

Radial collateral ligament

Ans. B

Explanation:

The radial notch of the ulna and the annular ligament form a ring in which the head of the radius rotates at its articulation with the capitulum of the humerus. The annular ligament narrows over the neck, cupping the head of the radius and preventing downward dislocation.
 

Q. 3

Excision of head of radius in a child should not be done because

 A

It produces instability of elbow joint

 B

It leads to secondary Osteo arthritis of elbow

 C

It causes subluxation of inferior radio-ulnar joint 

 D

It causes myositis ossificans.

Q. 3

Excision of head of radius in a child should not be done because

 A

It produces instability of elbow joint

 B

It leads to secondary Osteo arthritis of elbow

 C

It causes subluxation of inferior radio-ulnar joint 

 D

It causes myositis ossificans.

Ans. C

Explanation:

C i.e. It causes subluxation of inferior radioulnar joint


Q. 4

If head of the radius is removed, it will result in

 A

Lengthening of limb

 B

Valgus deformity

 C

Varus deformity

 D

No deformity

Q. 4

If head of the radius is removed, it will result in

 A

Lengthening of limb

 B

Valgus deformity

 C

Varus deformity

 D

No deformity

Ans. B

Explanation:

B i.e. Valgus deformity

Classically the head of radius should not be excised in children because ‑

–  It will interfere with the synchronous growth of radius and ulnar producing wrist & elbow deformity.

– It leads to proximal radial migration & subluxation of inferior radio ulnar joint(2.

– It causes weakness of extremity & discomfort in distal radio – ulnar joint with heavy activities

– May produce cubitus valgus deformityQ and instability.


Q. 5

In Monteggia fracture, which is true about ulnar fracture and head of radius

 A

Both ulnar fracture and head of radius is displaced posteriorly

 B

Both ulnar fracture and head of radius is displaced anteriorly

 C

Ulnar fractures is posteriorly and head of radius is displaced anteriorly

 D

Ulnar fracture is anteriorly and head of radius is displaced posteriorly

Q. 5

In Monteggia fracture, which is true about ulnar fracture and head of radius

 A

Both ulnar fracture and head of radius is displaced posteriorly

 B

Both ulnar fracture and head of radius is displaced anteriorly

 C

Ulnar fractures is posteriorly and head of radius is displaced anteriorly

 D

Ulnar fracture is anteriorly and head of radius is displaced posteriorly

Ans. B

Explanation:

B i.e. Both ulnar fracture and head of radius is displaced anteriorly


Q. 6

The treatment of choice of fracture of radius and ulna in a an adult is:

 A

Plaster for 4 weeks

 B

Closed reduction and calipers

 C

Only plates

 D

Kuntscher nails

Q. 6

The treatment of choice of fracture of radius and ulna in a an adult is:

 A

Plaster for 4 weeks

 B

Closed reduction and calipers

 C

Only plates

 D

Kuntscher nails

Ans. C

Explanation:

C i.e. Only plates

  • Fracture both bones of forearm may result in severe loss of function unless adequately treated by restoring normal relationship of radius and ulnaQ. The relationship of radio humeral, ulno humeral, proximal radioulnar, radio carpal and distal radioulnar joints and the interosseous space must be anatomical or some functional impairment will occur.
  • In addition to regaining length, and axial alignment (by reducing angulation) , achieving normal rotational alignment is necessary if a good, range of pronation & supination is to be restored.
  • Forearm rotation is vulnerable to any malalignment of radius and accurate rotational as well as axial reduction is necessary
  • Malunion and nonunion occur more frequently because of the difficulty in reducing and maintaing the reduction of two parallel bones in the presence of pronating and supinating muscles that have angulating and rotational influences
  • Because of these factors OR&IF (by plating)Q of displaced diaphyseal fractures in adult is accepted as best method of treatment.

Q. 7

Complications of fracture (#) radius are:

 A

Volmann ischemic contracture

 B

Myositis ossificans

 C

Infection

 D

All

Q. 7

Complications of fracture (#) radius are:

 A

Volmann ischemic contracture

 B

Myositis ossificans

 C

Infection

 D

All

Ans. D

Explanation:

D i. e. All


Q. 8

Fracture of distal end of radius may results in loss of function of which tendon:          

September 2007

 A

Extensor pollicis longus

 B

Flexor pollicis brevis

 C

Extensor indicis

 D

Extensor digitorum

Q. 8

Fracture of distal end of radius may results in loss of function of which tendon:          

September 2007

 A

Extensor pollicis longus

 B

Flexor pollicis brevis

 C

Extensor indicis

 D

Extensor digitorum

Ans. A

Explanation:

Ans. A: Extensor Pollicis Longus


Q. 9

Carpal bone which articulates with radius ‑

 A

Trapezium

 B

Scaphoid

 C

Capitate

 D

Hamate

Q. 9

Carpal bone which articulates with radius ‑

 A

Trapezium

 B

Scaphoid

 C

Capitate

 D

Hamate

Ans. B

Explanation:

Two carpal bones articulate with radius: Scaphoid and lunate.


Q. 10

The forcible separation of the head of the radius from the structure marked in the picture below is mainly prevented by the ? 

 A

Articular capsule.


 B

Annular ligament.

 C

Quadrate ligament.

 D

Radial collateral ligament.

Q. 10

The forcible separation of the head of the radius from the structure marked in the picture below is mainly prevented by the ? 

 A

Articular capsule.


 B

Annular ligament.

 C

Quadrate ligament.

 D

Radial collateral ligament.

Ans. B

Explanation:

 The structure marked in the picture above represents Capitulum.

The radial notch of the ulna and the annular ligament form a ring in which the head of the radius rotates at its articulation with the capitulum of the humerus. The annular ligament narrows over the neck, cupping the head of the radius and preventing downward dislocation.


Q. 11

In the type of fracture shown below, which among the following is true about ulnar fracture and head of radius ? 

 A

Both ulnar fracture and head of radius is displaced posteriorly.

 B

Both ulnar fracture and head of radius is displaced anteriorly.

 C

Ulnar fractures is posteriorly and head of radius is displaced anteriorly.

 D

Ulnar fracture is anteriorly and head of radius is displaced posteriorly.

Q. 11

In the type of fracture shown below, which among the following is true about ulnar fracture and head of radius ? 

 A

Both ulnar fracture and head of radius is displaced posteriorly.

 B

Both ulnar fracture and head of radius is displaced anteriorly.

 C

Ulnar fractures is posteriorly and head of radius is displaced anteriorly.

 D

Ulnar fracture is anteriorly and head of radius is displaced posteriorly.

Ans. B

Explanation:

The fracture shown in the picture above represents Monteggia fracture.

 In Monteggia fracture, both ulnar fracture and head of radius is displaced anteriorly.



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