Facial Bones Labeling Quiz: Test Your Anatomy Knowledge

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Questions and Answers

Which bone forms the nasal septum?

Zygomatic bone

Vomer (correct)

Maxillary bone

Inferior nasal conchae

Which bones articulate with all other facial bones except the mandible?

Palatine bones

Maxillary bones (correct)

Nasal bones

Zygomatic bones

What is the function of the lacrimal bones?

Form the nasal septum

Articulate with the frontal bone

Prominence of the cheeks

Smallest bones in the skull (correct)

From which bone do the inferior nasal conchae extend?

Nasal bones Signup and view all the answers

Which bone articulates with the frontal bone superiorly and forms the prominence of the cheeks?

Zygomatic bones Signup and view all the answers

Which bone is composed of vertical and horizontal plates and articulates with the maxillae?

Palatine bones Signup and view all the answers

Which bone is the only bone of the body that does not articulate directly with any other bone?

Hyoid bone Signup and view all the answers

In how many parts does the hyoid bone consist?

One body and two cornua Signup and view all the answers

Which type of joint tissue is found at the temporomandibular joint (TMJ)?

Synovial joint Signup and view all the answers

What is the term for a fracture located at the base of the skull?

Basal fracture Signup and view all the answers

What is the term for a fracture causing a portion of the skull to be depressed into the cranial cavity?

Depressed fracture Signup and view all the answers

Which condition is characterized by increased density of atypically soft bone?

Osteopetrosis Signup and view all the answers

What is the term for new tissue growth where cell proliferation is uncontrolled?

Tumor Signup and view all the answers

Which landmark is used in accurate positioning of the skull?

Midsagittal plane Signup and view all the answers

What does OML to IOML represent?

An angle on the skull Signup and view all the answers

What does GML to OML represent?

An angle on the skull Signup and view all the answers

In the modified Caldwell method, how much is the CR angled for the PA axial projection?

15° cephalad Signup and view all the answers

In the AP axial projection, how do the orbits appear compared to the PA axial projection?

They are more magnified Signup and view all the answers

What is the patient position for the true/original Caldwell method?

Prone, forehead & nose against IR, OML ⊥ to IR, MSP ⊥ to IR Signup and view all the answers

In the PA projection, which bone completely fills the orbits?

Petrous pyramid Signup and view all the answers

What anatomical structures are visible in the modified Caldwell method?

Frontal sinuses & anterior ethmoid sinus Signup and view all the answers

How does the position of the cranium differ in the PA and AP axial projections?

The cranium is more elevated in the AP axial projection Signup and view all the answers

What is the recommended patient position for the HAAS METHOD (PA AXIAL PROJECTION)?

Prone Signup and view all the answers

How many inches above the external auditory meatus (EAM) is the recommended point of entry for the SCHULLER/ PFEIFFER METHOD (SUBMENTOVERTICAL PROJECTION)?

1.5 inches Signup and view all the answers

For what type of patients is the TOWNE/ ALTSCHUL/ GRASHEY/ CHAMBERLAINE METHOD (AP AXIAL PROJECTION) recommended?

Patients with pathologic conditions, trauma, or deformity Signup and view all the answers

What is the entrance point for the SCHULLER METHOD (VERTICOSUBMENTAL PROJECTION)?

¾ inch anterior to EAM Signup and view all the answers

What does the HAAS METHOD (PA AXIAL PROJECTION) aim to obtain images of?

Sellar structures Signup and view all the answers

What does the TOWNE/ ALTSCHUL/ GRASHEY/ CHAMBERLAINE METHOD (AP AXIAL PROJECTION) aim to obtain images of?

Foramen ovale & spinosum Signup and view all the answers

At what angle is the CR for the TOWNE/ ALTSCHUL/ GRASHEY/ CHAMBERLAINE METHOD (AP AXIAL PROJECTION) directed when OML is perpendicular to the IR?

$30°$ caudad Signup and view all the answers

What should be within the shadow of the foramen magnum in the TOWNE/ ALTSCHUL/ GRASHEY/ CHAMBERLAINE METHOD (AP AXIAL PROJECTION)?

Occipital bone Signup and view all the answers

In which projection is the patient's head rested on the vertex and neck hyperextended?

(SUBMENTOVERTICAL PROJECTION) Signup and view all the answers

Study Notes

Facial Bones

The nasal septum is formed by the vomer bone.
The zygomatic bones articulate with all other facial bones except the mandible.

Lacrimal Bones

The function of the lacrimal bones is to produce tears and drain them into the nasal cavity.

Nasal Conchae

The inferior nasal conchae extend from the maxilla bone.

Cheek Prominence

The zygomatic bone articulates with the frontal bone superiorly and forms the prominence of the cheeks.

Palatine Bone

The palatine bone is composed of vertical and horizontal plates and articulates with the maxillae.

Hyoid Bone

The hyoid bone is the only bone of the body that does not articulate directly with any other bone.
The hyoid bone consists of three parts.

Temporomandibular Joint (TMJ)

The temporomandibular joint (TMJ) is a type of synovial joint.

skull Fractures

A fracture located at the base of the skull is called a basilar fracture.
A fracture causing a portion of the skull to be depressed into the cranial cavity is called a depressed fracture.

Bone Conditions

Osteopetrosis is a condition characterized by increased density of atypically soft bone.
Neoplasia is a term for new tissue growth where cell proliferation is uncontrolled.

Skull Landmarks

The lambda is a landmark used in accurate positioning of the skull.

Skull Projections

OML to IOML represents the orbitomeatal line to the infraorbitomeatal line.
GML to OML represents the glabellomeatal line to the orbitomeatal line.

Modified Caldwell Method

In the modified Caldwell method, the CR is angled 15-20 degrees for the PA axial projection.

AP Axial Projection

In the AP axial projection, the orbits appear more circular compared to the PA axial projection.
The patient position for the true/original Caldwell method is seated upright with the head positioned so that the OML is perpendicular to the IR.
In the PA projection, the sphenoid bone completely fills the orbits.

Modified Caldwell Method vs AP Axial Projection

In the PA axial projection, the anatomical structures visible are the sphenoid bone, frontal bone, and nasal conchae.
The position of the cranium differs in the PA and AP axial projections, with the PA projection showing the cranial structures in a more natural position.

HAAS Method (PA Axial Projection)

The recommended patient position for the HAAS method is seated upright with the head positioned so that the OML is perpendicular to the IR.
The HAAS method aims to obtain images of the cranial structures, including the sphenoid bone, frontal bone, and nasal conchae.

SCHULLER/PFEIFFER Method (Submentovertical Projection)

The recommended point of entry for the SCHULLER/PFEIFFER method is 2-3 inches above the external auditory meatus (EAM).

TOWNE/ALTSCHUL/GRASHEY/CHAMBERLAINE Method (AP Axial Projection)

The TOWNE/ALTSCHUL/GRASHEY/CHAMBERLAINE method is recommended for patients with cranial or facial trauma.
The entrance point for the SCHULLER method is the base of the skull, at the tip of the mastoid process.
The TOWNE/ALTSCHUL/GRASHEY/CHAMBERLAINE method aims to obtain images of the cranial structures, including the frontal bone, nasal conchae, and sphenoid bone.
For the TOWNE/ALTSCHUL/GRASHEY/CHAMBERLAINE method, the CR is directed at an angle of 30-40 degrees when OML is perpendicular to the IR.
The foramen magnum should be within the shadow of the foramen magnum in the TOWNE/ALTSCHUL/GRASHEY/CHAMBERLAINE method.
The patient's head is rested on the vertex and neck hyperextended in the TOWNE/ALTSCHUL/GRASHEY/CHAMBERLAINE method.

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Description

Test your knowledge of the anatomy of facial bones with this quiz. Identify and understand the features and articulations of nasal, lacrimal, maxillary, and zygomatic bones.

Facial Bones Anatomy Quiz

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