The part of the bone that enters into the formation of a joint is called?

AIIMS Raipur NO - 2017 (Shift-1)

Applied Anatomy

Easy

Appeared in: AIIMS Raipur NO - 2017 (Shift-1)

Explanation

The term 'articulating surface' is the correct general anatomical name for the part of a bone that comes into contact with another bone to form a joint.
This surface is typically covered with a smooth layer of hyaline cartilage (articular cartilage) to reduce friction and absorb shock during movement.
Other terms like 'condyle' and 'facet' describe specific shapes of articulating surfaces, making 'articulating surface' the most encompassing and accurate answer.

Option B: A bony sinus is an air-filled cavity within a bone (like the paranasal sinuses in the skull). It has no function in joint formation.
Option C: A condyle is a specific type of articulating surface, characterized by its large, rounded, knuckle-like shape. It is not the general term for all such surfaces.
Option D: A facet is also a specific type of articulating surface, defined as a small, smooth, flat or slightly curved area. It is not the general term.

Visual 1: Diagram - A diagram of a typical synovial joint (like the knee) with the articulating surfaces of the femur and tibia clearly labeled. This would visually differentiate the general surface from specific features like condyles.
Visual 2: Chart - A flowchart or hierarchy chart showing 'Articulating Surface' as the main category, with branches leading to specific types like 'Condyle', 'Facet', 'Head', and 'Trochlea'.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomical Terminology of Bones and Joints as background academic context rather than a clinical decision trigger.
Understanding the term 'articulating surface' is fundamental for nurses in orthopedic and medical-surgical settings. Conditions like osteoarthritis are characterized by the degeneration of the articular cartilage covering these surfaces, leading to pain and immobility.
When assessing a patient with joint pain, a nurse must consider that the issue originates from the articulating surfaces. This guides physical assessment, patient education about the disease process, and understanding the rationale for treatments like joint replacement surgery.
What if? - If a patient's X-ray report mentions 'sclerosis of the subchondral bone at the medial femoral condyle,' the nurse understands this refers to hardening of the bone just beneath a specific, damaged articulating surface in the knee, a common sign of advanced arthritis.

How to Approach the Question

First, identify the core of the question: it's asking for a definition from anatomical terminology.
Analyze the options to see the relationship between them. Notice that 'condyle' and 'facet' are specific bone features, while 'articulating surface' sounds like a more general description.
Recognize this as a hierarchical classification question. You need to determine if the question is asking for a general category or a specific example.
The phrase 'the part of the bone' suggests a general term is needed, not a specific type of part.
Eliminate 'bony sinus' as it is functionally unrelated to joints.
Between the remaining options, select 'articulating surface' as it is the broad category that includes specific types like condyles and facets.

Concept Tested & Keywords

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