👄 Rationale: Brown, Crusted Deposits on Lips and Teeth 👄

In some ill or dehydrated patients, brown or black crusts are observed on the lips, teeth, and gums.

The reasons for the formation of this crust are:

• Dryness of the mouth
• Poor oral hygiene
• Accumulation of food particles
• Dried mucus and bacteria

Question – What is the term for the brown crust that forms on the lips and teeth?

✅ Correct Answer: (a) Sordes

Sordes is the condition in which brown crusts accumulate on the lips, teeth, and gums.

This condition is particularly observed in:

• High fever
• Dehydration
• Unconscious or critically ill patients

It is an indication of poor oral hygiene and dry mouth.

Why are the other options incorrect?

(b) Halitosis → This means bad breath, not crust formation.

(c) Cheilosis → This involves cracks at the corners of the lips, often due to vitamin B deficiency.

(d) Calculus → This refers to hardened plaque (tartar) on the teeth, not crusts on the lips.

✅ Exam Point:
Brown crusts on lips and teeth →
➤ Sordes
(Common in fever and dehydration)

📌 Disclaimer: This content is for nursing exam preparation. For clinical practice, please refer to standard textbooks.

💚 Exam Objective Nursing – Asha D
Concept clarity • Exam confidence • Nursing success