NBDE Part 1 - Dental Anatomy and Occlusion UPDATED
ACTUAL Questions and CORRECT Answers
Which suprahyoid muscle are innervated by = Posterior Digastric and Stylohyoid
the facial nerve?
Infrahyoid Muscles = DEPRESSORS of the larynx and the hyoid bone
1. Omohyoid (Ana Cervicalis, C1-C3)
2. Sternohyoid (Ana Cervicalis, C1-C3)
3. Sternothyroid (Ana Cervicalis, C1-C3)
4. Thyrohyoid (Ventral Ramus of C1 via Hypoglossal)
Which dental tissue most closely resembles = CEMENTUM
bone? - Cementum has COLLAGEN fibers and CELLULAR
COMPONENTS (Cementocytes)
- have Acellular and Cellular cementum
- Cementoid is laid down first
, Extrinsic Tongue Muscles 1. Genioglossus (Hypoglossal)
2. Hyoglossus (Hypoglossal)
3. Styloglossus (Hypoglossal)
4. Palatoglossus (VAGUS NERVE)
Intrinsic Tongue Muscles 1. Superior Longitudinal
2. Inferior Longitudinal
3. Transverse Muscle
4. Vertical Muscle
**All of these are innervated by the HYPOGLOSSAL
NERVE****
Muscles of the Mouth/Facial Expression = are innervated by the six branches of the Facial Nerve
- Posterior muscles = Posterior Auricular
- Anterior Muscles = 5 branches of the PAROTID PLEXUS
(Temporal, Zygomatic, Buccal, Mandibular, Cervical)
When there's injury to the mandible (i.e., = TO THE SIDE OF INJURY
malignancy), to which side will it deviate? = if the hypoglossal nerve becomes damaged, the tongue will
deviate TOWARD the affected side
muscles of mastication are innervated by Mandibular Division of the Trigeminal Nerve (V3)
When the condylar head is fractured, what = Temporomandibular Ligament
keeps it in the mandibular fossa?
What muscle contracts during lateral = the one lateral pterygoid muscle from the OPPOSITE SIDE
excursive movements? - so if the patient is moving their mandible to the right, the
LEFT LATERAL PTERYGOID is what contracts
Gemination and fusion occur during which = CAP STAGE (9-10th week)
stage of tooth development?
- Dens in dente and Tubercle formation also occur during this
time
- Proliferation, differentiation, and morphogenesis
ACTUAL Questions and CORRECT Answers
Which suprahyoid muscle are innervated by = Posterior Digastric and Stylohyoid
the facial nerve?
Infrahyoid Muscles = DEPRESSORS of the larynx and the hyoid bone
1. Omohyoid (Ana Cervicalis, C1-C3)
2. Sternohyoid (Ana Cervicalis, C1-C3)
3. Sternothyroid (Ana Cervicalis, C1-C3)
4. Thyrohyoid (Ventral Ramus of C1 via Hypoglossal)
Which dental tissue most closely resembles = CEMENTUM
bone? - Cementum has COLLAGEN fibers and CELLULAR
COMPONENTS (Cementocytes)
- have Acellular and Cellular cementum
- Cementoid is laid down first
, Extrinsic Tongue Muscles 1. Genioglossus (Hypoglossal)
2. Hyoglossus (Hypoglossal)
3. Styloglossus (Hypoglossal)
4. Palatoglossus (VAGUS NERVE)
Intrinsic Tongue Muscles 1. Superior Longitudinal
2. Inferior Longitudinal
3. Transverse Muscle
4. Vertical Muscle
**All of these are innervated by the HYPOGLOSSAL
NERVE****
Muscles of the Mouth/Facial Expression = are innervated by the six branches of the Facial Nerve
- Posterior muscles = Posterior Auricular
- Anterior Muscles = 5 branches of the PAROTID PLEXUS
(Temporal, Zygomatic, Buccal, Mandibular, Cervical)
When there's injury to the mandible (i.e., = TO THE SIDE OF INJURY
malignancy), to which side will it deviate? = if the hypoglossal nerve becomes damaged, the tongue will
deviate TOWARD the affected side
muscles of mastication are innervated by Mandibular Division of the Trigeminal Nerve (V3)
When the condylar head is fractured, what = Temporomandibular Ligament
keeps it in the mandibular fossa?
What muscle contracts during lateral = the one lateral pterygoid muscle from the OPPOSITE SIDE
excursive movements? - so if the patient is moving their mandible to the right, the
LEFT LATERAL PTERYGOID is what contracts
Gemination and fusion occur during which = CAP STAGE (9-10th week)
stage of tooth development?
- Dens in dente and Tubercle formation also occur during this
time
- Proliferation, differentiation, and morphogenesis
