Facial Bones Anatomy Quiz
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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?

    <p>Nasal bones</p> Signup and view all the answers

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

    <p>Zygomatic bones</p> Signup and view all the answers

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

    <p>Palatine bones</p> Signup and view all the answers

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

    <p>Hyoid bone</p> Signup and view all the answers

    In how many parts does the hyoid bone consist?

    <p>One body and two cornua</p> Signup and view all the answers

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

    <p>Synovial joint</p> Signup and view all the answers

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

    <p>Basal fracture</p> 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?

    <p>Depressed fracture</p> Signup and view all the answers

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

    <p>Osteopetrosis</p> Signup and view all the answers

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

    <p>Tumor</p> Signup and view all the answers

    Which landmark is used in accurate positioning of the skull?

    <p>Midsagittal plane</p> Signup and view all the answers

    What does OML to IOML represent?

    <p>An angle on the skull</p> Signup and view all the answers

    What does GML to OML represent?

    <p>An angle on the skull</p> Signup and view all the answers

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

    <p>15° cephalad</p> Signup and view all the answers

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

    <p>They are more magnified</p> Signup and view all the answers

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

    <p>Prone, forehead &amp; nose against IR, OML ⊥ to IR, MSP ⊥ to IR</p> Signup and view all the answers

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

    <p>Petrous pyramid</p> Signup and view all the answers

    What anatomical structures are visible in the modified Caldwell method?

    <p>Frontal sinuses &amp; anterior ethmoid sinus</p> Signup and view all the answers

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

    <p>The cranium is more elevated in the AP axial projection</p> Signup and view all the answers

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

    <p>Prone</p> 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)?

    <p>1.5 inches</p> Signup and view all the answers

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

    <p>Patients with pathologic conditions, trauma, or deformity</p> Signup and view all the answers

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

    <p>¾ inch anterior to EAM</p> Signup and view all the answers

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

    <p>Sellar structures</p> Signup and view all the answers

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

    <p>Foramen ovale &amp; spinosum</p> 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?

    <p>$30°$ caudad</p> 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)?

    <p>Occipital bone</p> Signup and view all the answers

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

    <p>(SUBMENTOVERTICAL PROJECTION)</p> 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.

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