CCA Craniofacial Anatomy & Landmarks 3 — Questions and Answers
Question 1: The pogonion is a craniometric landmark used in facial analysis for chin prosthetics. It is defined as:
- The most posterior point of the mandibular symphysis
- The most anterior midline point of the chin (Correct answer)
- The inferior border of the mandible at the midline
- The junction of the chin and lower lip
Correct answer: The most anterior midline point of the chin
The pogonion is the most anteriorly projecting point of the bony chin (mandibular symphysis) in the midsagittal plane.
Question 2: In prosthetic rehabilitation following total rhinectomy, knowledge of the piriform aperture is essential. This aperture is the:
- Bony opening of the nasal cavity in the skull (Correct answer)
- Junction between the nasal dorsum and tip
- Cartilaginous framework of the nasal septum
- Opening between the nasopharynx and oropharynx
Correct answer: Bony opening of the nasal cavity in the skull
The piriform aperture is the pear-shaped bony opening of the nasal cavity formed by the nasal bones superiorly and the maxilla inferolaterally.
Question 3: The gonion is a craniometric point located at:
- The condylar head of the mandible
- The most inferolateral point of the mandibular angle (Correct answer)
- The midpoint of the mandibular body
- The mental protuberance
Correct answer: The most inferolateral point of the mandibular angle
The gonion is the most inferoposterior point of the mandibular angle, used to assess lower facial width in prosthetic planning.
Question 4: Which cartilage forms the columella of the nose and is critical for nasal prosthetic design?
- Upper lateral cartilage
- Medial crura of the lower lateral (alar) cartilage (Correct answer)
- Septal cartilage
- Sesamoid cartilage
Correct answer: Medial crura of the lower lateral (alar) cartilage
The medial crura of the lower lateral (greater alar) cartilages form the structural framework of the columella.
Question 5: An anaplastologist notes the location of the mental foramen when fitting a mandibular prosthesis. It is typically found:
- At the mandibular symphysis
- Between the roots of the first and second mandibular premolars (Correct answer)
- Inferior to the mandibular first molar
- At the posterior border of the mandibular ramus
Correct answer: Between the roots of the first and second mandibular premolars
The mental foramen typically opens between the apices of the mandibular first and second premolars, transmitting the mental nerve and vessels.
Question 6: The ala of the nose, which anchors many nasal prostheses, is composed primarily of:
- Hyaline cartilage and bone
- Fibrous connective tissue and minor alar cartilage (Correct answer)
- Septal cartilage extensions
- Dense cortical bone
Correct answer: Fibrous connective tissue and minor alar cartilage
The nasal alae (wings) are composed of fibrous connective tissue and minor (lesser) alar cartilages, with no major cartilage support.
Question 7: When creating a prosthetic ear, the anaplastologist must reproduce the antihelix. The antihelix is best described as:
- The central bowl-shaped depression of the auricle
- The Y-shaped cartilaginous ridge medial to the helix (Correct answer)
- The flap of cartilage anterior to the ear canal
- The inferior soft-tissue lobe of the auricle
Correct answer: The Y-shaped cartilaginous ridge medial to the helix
The antihelix is the curved cartilaginous ridge that runs parallel and medial to the helix, dividing into superior and inferior crura.
CCA Craniofacial Anatomy & Landmarks 3
The pogonion is a craniometric landmark used in facial analysis for chin prosthetics.
It is defined as: