**Question:** In class III Ellis fracture

A. Disruption of articular surface
B. Disruption of the articular cartilage
C. Disruption of the joint capsule
D. Disruption of the ligamentous apparatus

**Core Concept:** Class III Ellis fracture refers to a fracture where there is disruption of the articular surface and the joint capsule. This type of fracture is characterized by a severe disruption of the articular surface, leading to significant joint instability and possible articular cartilage damage.

**Why the Correct Answer is Right:**

In a class III Ellis fracture, the primary concern is the disruption of both the articular surface and the joint capsule. This severe disruption results in significant instability of the affected joint and can lead to damage of the articular cartilage due to the abnormal loading and stress on the joint. This type of fracture requires prompt intervention to stabilize the joint and minimize complications like arthritis or further joint damage.

**Why Each Wrong Option is Incorrect:**

A. Disruption of articular surface (Option A) is part of a class III Ellis fracture, but the correct answer also accounts for the disruption of the joint capsule (Option C), which is crucial for understanding the severity of the injury.

B. Disruption of the articular cartilage (Option B) is a potential complication from a class III Ellis fracture, but it is not the primary focus of the question as it is not mentioned in the correct answer.

C. Disruption of the ligamentous apparatus (Option D) is not mentioned in the correct answer, which focuses on the articular surface and joint capsule disruption.

**Clinical Pearl:** Class III Ellis fractures are complex injuries that require a comprehensive understanding of the fracture type and its associated complications. Clinical pearls in managing such injuries include prompt reduction and fixation to prevent arthritis and further joint damage.

**Correct Answer:** Class III Ellis fracture

In a class III Ellis fracture, the primary concern is the disruption of both the articular surface and the joint capsule. This severe disruption results in significant instability of the affected joint and can lead to damage of the articular cartilage due to the abnormal loading and stress on the joint. This type of fracture requires prompt intervention to stabilize the joint and minimize complications like arthritis or further joint damage.