Тест: Mandibular Anatomy and Landmarks — 9 въпроса

1. What is the mandibular foramen?

A. A bony projection on the anterior border of the mandibular body that marks the attachment site for muscles.

B. An opening on the lateral surface of the mandibular ramus that transmits the mental nerve.

C. A ridge on the superior border of the mandibular body that supports the teeth.

D. An opening on the medial surface of the mandibular ramus that transmits the inferior alveolar nerve.

Answer: (D)

Обяснение

The mandibular foramen is an opening on the medial surface of the mandibular ramus that serves as the entrance to the mandibular canal, allowing passage of the inferior alveolar nerve and vessels.

2. Which bone is the only movable facial skeleton bone?

A. The mandible

B. The maxilla

C. The zygomatic bone

D. The nasal bone

Answer: (A)

Обяснение

The mandible is the only mobile bone of the facial skeleton, capable of movement at the temporo-mandibular joint, essential for functions like mastication and speech.

3. What is the name of the posterior projection of the mandibular ramus that articulates with the skull at the temporo-mandibular joint?

A. Mental process

B. Condylar process

C. Coronoid process

D. Lingula

Answer: (B)

Обяснение

The posterior projection of the mandibular ramus that articulates with the skull at the temporo-mandibular joint is called the condylar process. It is distinct from the coronoid process, which serves as an attachment site for muscles, and from the mental process and lingula, which are different structures on the mandible.

4. What structures constitute the two main parts of the mandible?

A. Horizontal body and vertical branches

B. Horizontal ramus and alveolar process

C. Coronoid process and condylar process

D. Mental protuberance and mandibular notch

Answer: (A)

Обяснение

The mandible consists of a horizontal body and two vertical branches, which are joined at the mandibular angles, providing structure and attachment points.

5. Where do the mandibular angles, or gonions, form?

A. Where the body and branches meet

B. At the mental foramen

C. At the mandibular notch

D. At the mandibular condyle

Answer: (A)

Обяснение

The gonions are the palpable angles where the mandibular body and branches unify, marking key topographical landmarks for facial analysis.

6. What is the purpose of the mandibular condylar and coronoid processes?

A. The condylar process articulates with the skull; the coronoid process serves as an attachment for muscles

B. Both are attachments for the masseter muscle

C. They form part of the mandibular foramen

D. They are points of muscle insertion for the digastric muscle

Answer: (A)

Обяснение

The condylar process articulates with the temporal bone at the temporo-mandibular joint, while the coronoid process serves as an attachment site for muscles like temporalis.

7. What passes through the mental foramen in the mandible?

A. Mental nerve

B. Facial nerve

C. Inferior alveolar artery

D. Optic nerve

Answer: (A)

Обяснение

The mental foramen transmits the mental nerve, a branch of V3, responsible for sensation to the chin and lower lip.

8. Which muscle attaches to the mandibular ramus?

A. Masseter

B. Temporalis

C. Buccinator

D. Platysma

Answer: (A)

Обяснение

The masseter muscle attaches to the lateral surface of the mandibular ramus, playing a key role in jaw elevation during mastication.

9. What anatomical landmark marks the transition between the body and the ramus of the mandible?

A. Mandibular angle (gonion)

B. Mental foramen

C. Coronoid process

D. Mandibular notch

Answer: (A)

Обяснение

The mandibular angle or gonion is the external landmark where the horizontal body joins the vertical ramus.