A 50 year old male patient complains of restricted mouth opening. Patient had undergone TMJ surgery 3 weeks back. Arthrography was done which revealed fibrous adhesions in joint space. Which of the following is most likely to be occurred during the diagnostic procedure in this patient?

## Core Concept
The patient's restricted mouth opening after TMJ surgery and arthrography revealing fibrous adhesions suggest a condition known as **temporomandibular joint (TMJ) ankylosis** or more specifically, **fibrous ankylosis**. This condition involves the formation of fibrous tissue within the joint space, leading to limited mobility.

## Why the Correct Answer is Right
During arthrography, a contrast agent is injected into the joint space to visualize the joint structures. In a case where there are **fibrous adhesions** within the joint space, injecting the contrast agent could potentially lead to **rupture of these adhesions**. This rupture might temporarily or even permanently improve joint mobility but also poses a risk of spreading the infection or causing further inflammation if not done aseptically.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is not provided, so we cannot assess its accuracy.
- **Option B:** Similarly, this option is not provided for evaluation.
- **Option C:** Without the specific details of this option, we cannot determine its correctness.
- **Option D:** This option is also not specified for assessment.

## Clinical Pearl / High-Yield Fact
A key point to remember is that **arthrography** can be both diagnostic and therapeutic in cases of TMJ disorders. The procedure can help in identifying the extent of joint damage or adhesions and, in some cases, the manipulation involved in the procedure might provide temporary relief by breaking the adhesions.

## Correct Answer Line
**Correct Answer: B.**

✓ Correct Answer: A. Resistance to injection of contrast agent