NEET-PG 2013 - Dental PYQs Practice Questions

Q: Killion's incision is used for?

Septoplasty. ***Septoplasty*** - Killion's incision is a **hemitransfixion incision** performed on one side of the caudal nasal septum for **septoplasty**. - This incision allows for elevation of the **mucoperichondrial flap** and access to the septal cartilage for straightening. *SMR* - **Submucous resection (SMR)** typically utilizes a **transfixion incision** or a **hemitransfixion incision** at the caudal end of the septum, but the term "Killion's incision" specifically refers to one type of hemitransfixion used in septoplasty. - SMR often involves more aggressive removal of cartilage and bone compared to modern septoplasty techniques, although both aim to correct septal deviation. *Proetz puncture* - **Proetz puncture** refers to a procedure that involves puncturing the maxillary sinus through the inferior meatus for irrigation and drainage, and it is unrelated to septal surgery. - It is a diagnostic and therapeutic procedure for **sinusitis**, with no external incision on the septum. *Modified radical mastoidectomy* - A **modified radical mastoidectomy** is a surgical procedure for chronic ear disease, involving an incision behind the ear (**post-aural incision**) or within the ear canal (**endaural incision**), which is completely unrelated to nasal septal surgery. - This procedure aims to create a **safe and dry ear** by exteriorizing the mastoid air cells and reducing the size of the middle ear space. [Practice more Dental PYQs on OnCourse]

Q: During which sleep stage does bruxism typically occur?

NREM stage 3, 4. ***NREM stage 3, 4*** - **Bruxism**, or teeth grinding, most commonly occurs during **deep sleep stages**, specifically NREM stages 3 and 4 (often grouped as **slow-wave sleep**). - These stages are characterized by **delta waves** on EEG and are the deepest phases of sleep. *NREM stage 1 and 2* - **NREM stage 1** is a transitional stage from wakefulness to sleep, and **NREM stage 2** is a light sleep stage. - While some sleep-related events can occur, **bruxism** is less frequent and severe during these lighter sleep stages compared to deep sleep. *REM* - **REM sleep** is characterized by vivid dreaming, muscle atonia (paralysis), and rapid eye movements. - Due to **muscle atonia**, significant teeth grinding and jaw clenching are generally inhibited during this stage. *None of the options* - This option is incorrect because bruxism is a well-documented **sleep disorder** with a known association with specific sleep stages. - Research consistently points to **NREM deep sleep** as the primary period for bruxism activity. [Practice more Dental PYQs on OnCourse]

Q: What is the first permanent tooth to erupt?

First molar. ***First molar*** - The **first molars** are typically the first permanent teeth to erupt, usually around **6 years of age**. - They erupt distal to the primary second molars and are not preceded by primary teeth, making them crucial for establishing the **occlusion**. *First premolar* - **First premolars** typically erupt later, between **10 and 11 years of age**, replacing the primary first molars. - Their eruption is part of the **exchange of primary teeth** for permanent successors. *Second premolar* - The **second premolars** erupt even later, usually between **11 and 12 years of age**, replacing the primary second molars. - They are also involved in the **replacement of primary teeth**, not the initial permanent eruption. *Second molar* - **Second molars** erupt much later than the first molars, typically between **11 and 13 years of age**, distal to the first molars. - They are part of the **later stages of permanent dentition development**. [Practice more Dental PYQs on OnCourse]

Q: Which subtype of Acute Myeloid Leukemia (AML) is most commonly associated with gum hypertrophy?

Acute Myeloid Leukemia M4. ***M4*** - **Acute Myeloid Leukemia (AML) M4** is associated with **monocytic differentiation**, leading to gum hypertrophy due to infiltration of the gums by leukemic cells [1]. - Patients may present with **gingival bleeding**, pain, and swelling in addition to other systemic symptoms of leukemia. *M3* - Known as **acute promyelocytic leukemia**, it typically presents with **coagulopathy** and not gum hypertrophy [1]. - Characterized by **promyelocytes** with heavy granulation and the presence of **faggot cells** (auer rods) [1]. *M2* - Represents a **myeloblastic type** of acute leukemia but is less commonly associated with **gingival hyperplasia**. - Associated with **more typical myeloid features** and presents with **anemia** and **thrombocytopenia**. *M1* - This is a **minimally differentiated type** of acute myeloid leukemia with **myeloblasts** and no significant differentiating features like gum hypertrophy. - Often presents with **rapid onset of symptoms** related to bone marrow failure, rather than localized gum issues. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of White Blood Cells, Lymph Nodes, Spleen, and Thymus, pp. 620-622. [Practice more Dental PYQs on OnCourse]

Q: Which of the following methods is not recognized for dental age estimation in forensic odontology?

Frame method. ***Frame method*** - This is not a recognized method for **dental age estimation** in forensic odontology. The term "Frame method" does not correspond to any established technique used for this purpose. - While various imaging and assessment techniques are employed, this specific terminology is not standard. *Clinical examination* - **Clinical examination** is a foundational method for age estimation, especially in younger individuals, by observing the **eruption of deciduous and permanent teeth**. - It involves direct visual inspection of the oral cavity but has limitations for older individuals due to completed tooth eruption. *Radiographic assessment* - **Radiographic assessment** is a broad term encompassing various imaging techniques (like periapical, bitewing, or occlusal radiographs) to evaluate **tooth development stages** and **pulp calcification**, which are crucial for age estimation. - It allows for the visualization of internal tooth structures that are not visible during a clinical examination. *Panoramic X-ray evaluation* - **Panoramic X-rays** (orthopantomograms) are widely used in forensic odontology because they provide a comprehensive view of the entire dentition and surrounding structures in a single image. - They are particularly useful for assessing multiple teeth simultaneously, evaluating **tooth formation stages**, and observing **root development** and **pulp chamber changes**, which are critical indicators of age. [Practice more Dental PYQs on OnCourse]

Question 1

Killion's incision is used for?

Accepted Answer

Septoplasty

Answer

SMR

Answer

Modified radical mastoidectomy

Answer

Proetz puncture

Question 2

During which sleep stage does bruxism typically occur?

Accepted Answer

NREM stage 3, 4

Answer

REM

Answer

NREM stage 1 and 2

Answer

None of the options

Question 3

What is the first permanent tooth to erupt?

Accepted Answer

First molar

Answer

First premolar

Answer

Second premolar

Answer

Second molar

Question 4

Which subtype of Acute Myeloid Leukemia (AML) is most commonly associated with gum hypertrophy?

Accepted Answer

Acute Myeloid Leukemia M4

Answer

Acute Myeloid Leukemia M2

Answer

Acute Myeloid Leukemia M3

Answer

Acute Myeloid Leukemia M1

Question 5

Which of the following methods is not recognized for dental age estimation in forensic odontology?

Accepted Answer

Frame method

Answer

Panoramic X-ray evaluation

Answer

Clinical examination

Answer

Radiographic assessment

Question 6

What is the most common cause of an oroantral fistula?

Accepted Answer

Tooth extraction

Answer

TB

Answer

Penetrating injury

Answer

Maxillary sinusitis

Question 7

In which condition are Haab's striae typically observed?

Accepted Answer

Buphthalmos

Answer

Keratoglobus

Answer

Trachoma

Answer

Keratoconus

Question 8

What is the treatment of choice for a post-operative abscess?

Accepted Answer

Image guided aspiration

Answer

Hydration

Answer

IV antibiotics

Answer

Reexploration

Question 9

What investigation uses dye to find out stones in the salivary gland?

Accepted Answer

Sialography

Answer

MR angiography

Answer

USG

Answer

Breast imaging

Question 10

In Veau classification for cleft lip and palate, Type IV denotes

Accepted Answer

Bilateral cleft lip and palate

Answer

Bilateral cleft palate only

Answer

Bilateral cleft lip only

Answer

No cleft

NEET-PG 2013 — Dental