Tag: Healing of specialised tissue (fracture healing)

Healing of specialised tissue (fracture healing)

Healing of specialised tissue (fracture healing)

Q. 1

Following a fracture of the humerus, an adult patient has a biopsy of the healing area. Which of the following types of bone will the biopsy most likely show?

 A

Cancellous

 B

Compact

 C

Spongy

 D

Woven

Q. 1

Following a fracture of the humerus, an adult patient has a biopsy of the healing area. Which of the following types of bone will the biopsy most likely show?

 A

Cancellous

 B

Compact

 C

Spongy

 D

Woven

Ans. D

Explanation:

Bone is formed by type I collagen fibers, ground substance, and hydroxyapatite crystals. . It can be parallel (trabecular bone and periosteum) or concentric (Haversian system). When bone is formed quickly, as in a healing fracture site, metabolic bone disease, or tumor, the collagen is randomly oriented and is called woven bone.
Compact bone is the dense calcified external part of the bone. It is lamellar bone.
Cancellous , spongy and trabecular bone are all synonymous terms for the thinner network of bone within the cortex. These are also lamellar bone.

Q. 2

Last step in fracture healing is:

 A

Haematoma

 B

Callus formation

 C

Remodeling

 D

Consolidation

Q. 2

Last step in fracture healing is:

 A

Haematoma

 B

Callus formation

 C

Remodeling

 D

Consolidation

Ans. C

Explanation:

C i.e. Remodeling


Q. 3

The time necessary for healing of fracture depends on the following factors:

 A

Age of the patient

 B

Location of the fracture

 C

Type of the fracture

 D

All of the above

Q. 3

The time necessary for healing of fracture depends on the following factors:

 A

Age of the patient

 B

Location of the fracture

 C

Type of the fracture

 D

All of the above

Ans. D

Explanation:

D i.e. All

Quiz In Between


Q. 4

The most important factor in fracture healing is:

 A

Good alignment

 B

Organization of blood clot

 C

Accurate reduction and 100% apposition of fractured fragments

 D

Immobilisation

Q. 4

The most important factor in fracture healing is:

 A

Good alignment

 B

Organization of blood clot

 C

Accurate reduction and 100% apposition of fractured fragments

 D

Immobilisation

Ans. D

Explanation:

D i.e. Immobilization


Q. 5

Healing of # of bone is affected by:

 A

Micromovement

 B

Muscle interposition

 C

Hypoxia

 D

All

Q. 5

Healing of # of bone is affected by:

 A

Micromovement

 B

Muscle interposition

 C

Hypoxia

 D

All

Ans. D

Explanation:

A i.e. Micromovement; B i.e. Muscle interposition; C i.e. Hypoxia


Q. 6

Delayed wound healing is seen in all except‑

 A

Malignancy

 B

Hypertension

 C

Diabetes

 D

Infection

Q. 6

Delayed wound healing is seen in all except‑

 A

Malignancy

 B

Hypertension

 C

Diabetes

 D

Infection

Ans. B

Explanation:

Ans. is ‘b’ i.e., Hypertension 


Q. 7

Callus formation is seen between what duration of fracture healing

 A

0 – 2 weeks

 B

2 – 4 weeks

 C

4 – 12 weeks

 D

12 – 16 weeks

Q. 7

Callus formation is seen between what duration of fracture healing

 A

0 – 2 weeks

 B

2 – 4 weeks

 C

4 – 12 weeks

 D

12 – 16 weeks

Ans. C

Explanation:

Ans. is ‘c’ i.e., 4 – 12 weeks

Healing of a fracture

The process of fracture healing varies according to the type of bone involved and the amount of movement at the fracture site. Following healing processes are there :‑

Indirect fracture healing (healing by callus)

This is the ‘natural’ form of healing in tubular bones and in the absence of rigid fixation when there is micromovement at fracture site. There is formation of internal and external callus. This stage is divided in three phases which are further subdivided into five stages :

Quiz In Between



Healing of specialised tissue (fracture healing)

Healing of specialised tissue (fracture healing)


HEALING IN SPECIALIZED TISSUES

Fracture healing-

  • Healing of fracture by callus formation depends on-
  1. Traumatic/ pathological
  2. Complete/ incomplete
  3. Simple/ compound 

Healing of any fracture takes place by-

  1. Primary union of fracture
  2.  Secondary union (more common)- it is described under 3 heading-

a) Procallus formation- it is as follows

  1. Hematoma formation
  2. Local inflammatory response- fragments of necrosed bone are scavenged by macrophages & osteoclasts
  3. Ingrowth of granulation tissue- soft tissue callus formed
  4. Callus composed of woven bone & cartilage

b) Osseous callus formation-

  • Callus formation takes place- 4 to 12 weeks

c) Remodelling

  • Osteoblast & osteoclast removes necrotic content, which results in remodelling of the united bone end into compact bone.

Exam Important

  • Healing of any fracture takes place by-
  1. Primary union of fracture
  2.  Secondary union (more common)- it is described under 3 heading-

a) Procallus formation- it is as follows

  1. Hematoma formation
  2. Local inflammatory response- fragments of necrosed bone are scavenged by macrophages & osteoclasts
  3. Ingrowth of granulation tissue- soft tissue callus formed
  4. Callus composed of woven bone & cartilage

b) Osseous callus formation-

  • Callus formation takes place- 4 to 12 weeks

c) Remodelling

  • Osteoblast & osteoclast removes necrotic content, which results in remodelling of the united bone end into compact bone.

 

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