Chapter 29- normal anatomy!

(1) Areas of teeth not covered by the lips appear more radiolucent; areas covered by the lips appear more radiopaque. (2) The tongue appears as a faint dome-shaped, radiopaque area superimposed over maxillary posterior teeth. a. Both statements are true. b. Both statements are false. c.The first statement is true; the second statement is false. d. The first statement is false; the second statement is true.

a. Both statements are true. Areas of teeth not covered by the lips appear more radiolucent; areas covered by the lips appear more radiopaque. The tongue appears as a faint dome-shaped, radiopaque area superimposed over maxillary posterior teeth.

Orbit a. Label D b. Label A c. Label J d. Label E

a. Label D

This bilateral landmark is located above the apices of the maxillary premolars and molars and appears radiolucent on the panoramic image. a. Maxillary sinus b. Maxilla c. Incisive foramen d. Infraorbital foramen

a. Maxillary sinus The maxillary sinuses appear as paired radiolucent areas located superior to the apices of maxillary premolars and molars. The floor of the maxillary sinus is composed of dense cortical bone and appears as a radiopaque line. The maxilla forms the floor of the orbit of the eyes, the sides and floor of the nasal cavity, and the hard palate. The incisive foramen is a hole or opening in bone located at the midline of the anterior portion of the hard palate. The infraorbital foramen is a hole or opening in bone located inferior to the border of the orbit.

On a panoramic image, the articular eminence appears as a rounded radiopaque projection of the bone located _________ to the glenoid fossa. a. anterior b. posterior c. superior d. inferior

a. anterior On a panoramic image, the articular eminence appears as a rounded radiopaque projection of the bone located anterior to the glenoid fossa.

Only the __________ border of the orbit is visible on most panoramic images. a. inferior b. lateral c. medial d. superior

a. inferior Only the inferior border of the orbit is visible on most panoramic images.

The ________ foramen is a tiny hole or opening in bone located on the internal surface of the mandible near the midline. a. lingual b. mental c. incisive d. mandibular

a. lingual The lingual foramen is a tiny hole or opening in bone located on the internal surface of the mandible near the midline. The mental foramen is a hole or opening in bone located on the external surface of the mandible in the region of the mandibular premolars. The incisive foramen (nasopalatine foramen) is a hole or opening in bone located at the midline of the anterior portion of the hard palate directly posterior to the maxillary central incisors. The mandibular foramen is a round or ovoid hole in bone on the lingual aspect of the ramus of the mandible.

The hamulus extends from the a. medial pterygoid plate of the sphenoid bone. b. lateral pterygoid plate of the sphenoid bone. c. coronoid process. d. styloid process.

a. medial pterygoid plate of the sphenoid bone. The hamulus extends from the medial pterygoid plate of the sphenoid bone.

(1) The zygomatic process appears Y-shaped on images. (2) The zygomatic process appears radiolucent on images. a. Both statements are true. b. Both statements are false. c. The first statement is true; the second statement is false. d. The first statement is false; the second statement is true.

b. Both statements are false. On a panoramic image, the zygomatic process of the maxilla appears as a J- or U-shaped radiopacity.

Condyle a. Label B b. Label C c. Label G d. Label H

b. Label C

Nasal conchea a. Label B b. Label E c. Label F d. Label H

b. Label E

The anterior nasal spine is a pointed, bony protrusion of the maxilla situated ____________ the nasal fossa. a. in front of and above b. in front of and below c. behind and above d. behind and below

b. in front of and below The anterior nasal spine is a sharp bony projection of the maxilla located at the anterior and inferior portion of the nasal cavity.

The pterygomaxillary fissure is a narrow space or cleft that separates the ________ and the maxilla. a. medial pterygoid plate b. lateral pterygoid plate c. hamulus d. coronoid notch

b. lateral pterygoid plate The pterygomaxillary fissure is a narrow space or cleft that separates the lateral pterygoid plate and the maxilla.

On a panoramic image, the infraorbital foramen may be superimposed over the ____________. a. mental foramen b. maxillary sinus c. frontal sinus d. external auditory meatus

b. maxillary sinus On a panoramic image, the infraorbital foramen may be superimposed over the maxillary sinus. The infraorbital foramen is a hole or opening in bone found inferior to the border of the orbit. The mental foramen is a hole or opening in bone located on the external surface of the mandible in the region of the mandibular premolars; thus the infraorbital foramen would not be superimposed over the mental foramen on a panoramic image. The frontal sinus is superior to the orbit; thus the infraorbital foramen would not be superimposed over the frontal sinus on a panoramic image. The external auditory meatus is a hole or opening in the temporal bone located superior and anterior to the mastoid process; thus the infraorbital foramen would not be superimposed over the external auditory meatus on a panoramic image.

On a panoramic image, the ____________ air space appears as a diagonal radiolucency located superior to the radiopaque shadow of the soft palate and uvula. a. palatoglossal b. nasopharyngeal c. glossopharyngeal d. both a and b

b. nasopharyngeal On a panoramic image, the nasopharyngeal air space appears as a diagonal radiolucency located superior to the radiopaque shadow of the soft palate and uvula. The palatoglossal air space is found between the palate and the tongue and appears as a horizontal, radiolucent band located above the apices of the maxillary teeth. The glossopharyngeal air space is the portion of the pharynx located posterior to the tongue and oral cavity and appears as a vertical, radiolucent band superimposed over the ramus of the mandible.

On a panoramic image, the ear is viewed superimposed over the a. anterior teeth. b. styloid process. c. incisive foramen. d. mandibular canal.

b. styloid process. On a panoramic image, the ear is viewed superimposed over the styloid process.

External auditory meatus a. Label F b. Label G c. Label B d. Label I

c. Label B

Coronoid process a. Label B b. Label D c. Label F d. Label I

c. Label F

Zygomatic arch a. Label C b. Label E c. Label H d. Label J

c. Label H

Which of the following structures is part of the sphenoid bone? a. Glenoid fossa b. Articular eminence c. Lateral pterygoid plate d. Styloid process

c. Lateral pterygoid plate The lateral pterygoid plate is part of the sphenoid bone. The glenoid fossa is part of the temporal bone. The articular eminence is part of the temporal bone. The styloid process is part of the temporal bone.

On a panoramic image, which of the following structures appears as a radiolucency? a. Lateral pterygoid plate b. Medial pterygoid plate c. Pterygomaxillary fissure d. Coronoid process

c. Pterygomaxillary fissure On a panoramic image, the pterygomaxillary fissure appears as a radiolucency. The lateral pterygoid plate is a wing-shaped bony projection of the sphenoid bone located distal to the maxillary tuberosity region. The lateral pterygoid plate appears as a radiopaque bony projection that lies distal to the maxillary tuberosity region. The medial pterygoid plate appears as a bony projection that lies medial to, and is obscured by, the lateral pterygoid plate. A fissure is a narrow space or cleft, so a greater number of photons would pass through this area of decreased density. The coronoid process is a marked prominence of bone found on the anterior superior ramus of the mandible. The coronoid process appears as a triangular radiopacity that lies posterior to the maxillary tuberosity region.

On a panoramic image, the incisive foramen appears as an almond-shaped radiolucent area located a. at the apex of the mandibular first premolar. b. below the orbit c. between the roots of the maxillary central incisors. d. above the maxillary sinuses.

c. between the roots of the maxillary central incisors. On a panoramic image, the incisive foramen appears as a small, ovoid or round area located between the roots of the maxillary central incisors. The mental foramen is located near the apex of the mandibular first premolar. The infraorbital foramen is located inferior to the orbit. The orbit is located superior to the maxillary sinuses.

The ______________ is a marked prominence of bone found on the anterior superior ramus of the mandible. a. mandibular condyle b. coronoid notch c. coronoid process d. lingula

c. coronoid process The coronoid process is a marked prominence of bone found on the anterior superior ramus of the mandible. The mandibular condyle is a rounded projection of bone extending from the posterior superior border of the ramus of the mandible. The coronoid notch is a scooped-out concavity of bone located distal to the coronoid process of the mandible. The lingula is a small, tongue-shaped projection of bone seen adjacent to the mandibular foramen.

The _____________ articulates with the glenoid fossa. a. styloid process b. mastoid process c. mandibular condyle d. coronoid process

c. mandibular condyle The mandibular condyle rests in the glenoid fossa. The styloid process extends down from the inferior surface of the temporal bone. The mastoid process is part of the temporal bone. The coronoid process extends from the anterior portion of the mandible.

The _____________ is a long, thin, pointed process below the external auditory meatus. a. glenoid fossa b. articular eminence c. styloid process d. lateral pterygoid plate

c. styloid process The styloid process is a long, pointed, and sharp projection of bone that extends downward from the inferior surface of the temporal bone. The glenoid fossa is a concave, depressed area of the temporal bone located anterior to the mastoid process and the external auditory meatus. The articular eminence is a rounded projection of the temporal bone located anterior to the glenoid fossa. The lateral pterygoid plate is a thin, wing-shaped bony extension of the sphenoid bone located distal to the maxillary tuberosity region.

On a panoramic image, which of the following structures appears radiolucent on images and is located above and in front of the mastoid process? a. Hamulus b. Maxillary tuberosity c. Coronoid process d. External auditory meatus

d. External auditory meatus The external auditory meatus appears as a round-to-ovoid radiolucency anterior and superior to the mastoid process. The hamulus is located posterior to the maxillary tuberosity. The hamulus appears as a radiopaque hook-like projection posterior to the maxillary tuberosity area. On a panoramic image, the maxillary tuberosity appears as a radiopaque bulge distal to the third molar region. The coronoid process is a marked prominence of bone found on the anterior superior ramus of the mandible. The coronoid process appears as a triangular radiopacity posterior to the maxillary tuberosity region.

Mandibular canal a. Label I b. Label H c. Label J d. Label A

d. Label A

Hard palate a. Label A b. Label C c. Label E d. Label G

d. Label G

Border of the mandible a. Label A b. Label B c. Label C d. Label I

d. Label I

Mental foramen a. Label F b. Label G c. Label H d. Label J

d. Label J

Which of the following structures may be seen on a periapical image? a. Mastoid process b. Styloid process c. External auditory meatus d. Maxillary tuberosity

d. Maxillary tuberosity The maxillary tuberosity may be seen on a periapical image. The mastoid process is not seen on a periapical image. The styloid process is not seen on a periapical image. The external auditory meatus is not seen on a periapical image.

Which of the following structures may be seen on both periapical and panoramic images? a. Mandibular condyle b. Coronoid notch c. Mandibular foramen d. Mental foramen

d. Mental foramen The mental foramen may be seen on both periapical and panoramic images. The mandibular condyle is not seen on periapical images. The coronoid notch is not seen on periapical images. The mandibular foramen is not seen on periapical images.

You have been asked to take a single image on your patient to evaluate his maxilla and the mandible. Which of the following should you take? a. Four bite-wing images b. 18-image periapical series c. 21-image periapical series d. Panoramic

d. Panoramic The panoramic image allows the dental professional to view the largest area of the mandible and maxilla on a single image. Bite-wing images do not permit visualization of the apical area. An 18-image periapical series does not permit visualization of the entire maxilla and mandible. A 21-image periapical series does not permit visualization of the entire maxilla and mandible.

8. The glenoid fossa is a _______________ area. a. dome-shaped, elevated b. dome-shaped, indented c. bowl-shaped, elevated d. bowl-shaped, indented

d. bowl-shaped, indented The glenoid fossa is a concave, depressed area.

The __________ is a hole or opening in bone located on the external surface of the mandible in the region of the mandibular premolars. a. mandibular foramen b. lingula c. mandibular canal d. mental foramen

d. mental foramen The mental foramen is a hole or opening in bone located on the external surface of the mandible in the region of the mandibular premolars. The mandibular foramen is a round or ovoid hole in bone on the lingual aspect of the ramus of the mandible. The lingula is a small, tongue-shaped projection of bone seen adjacent to the mandibular foramen on the lingual surface of the mandible. The mandibular canal is a tubelike passageway through bone that travels the length of the mandible.

The nasal cavity is also known as the a. nasal spine. b. nasal septum. c. zygoma. d. nasal fossa.

d. nasal fossa. The nasal cavity is also known as the nasal fossa.

The mastoid process is a marked prominence of bone located ____________ to the temporomandibular joint (TMJ). a. anterior and superior b. anterior and inferior c. posterior and superior d. posterior and inferior

d. posterior and inferior The mastoid process is a marked prominence of bone located posterior and inferior to the TMJ.

The mastoid process is a sizable curved __________ that ______ seen on periapical images. a. radiolucency; is b. radiolucency; is not c. radiopacity; is d. radiopacity; is not

d. radiopacity; is not The mastoid process is a rounded radiopacity that is not seen on periapical images.

The nasal _______, which consists of bone and cartilage, separates the nasal cavity into the two halves. a. spine b. cavity c. hard palate d. septum

d. septum The nasal septum is a vertical bony wall or partition that divides the nasal cavity into the right and left nasal fossae.

The lateral pterygoid plate is a wing-shaped bony projection of the __________ bone. a. temporal b. frontal c. occipital d. sphenoid

d. sphenoid The lateral pterygoid plate is a wing-shaped bony projection of the sphenoid bone.