NBDE Part 1 - Dental Anatomy and
Occlusion Exam 2025 Questions and
Answers
Which suprahyoid muscle are innervated by the facial nerve? - ANSWER✔✔-=
Posterior Digastric and Stylohyoid
Infrahyoid Muscles - ANSWER✔✔-= 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 bone? - ANSWER✔✔-= CEMENTUM
- Cementum has COLLAGEN fibers and CELLULAR COMPONENTS (Cementocytes)
- have Acellular and Cellular cementum
- Cementoid is laid down first
Extrinsic Tongue Muscles - ANSWER✔✔-1. Genioglossus (Hypoglossal)
2. Hyoglossus (Hypoglossal)
3. Styloglossus (Hypoglossal)
4. Palatoglossus (VAGUS NERVE)
Intrinsic Tongue Muscles - ANSWER✔✔-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 - ANSWER✔✔-= 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., malignancy), to which side will it deviate?* -
ANSWER✔✔-= TO THE SIDE OF INJURY
= if the hypoglossal nerve becomes damaged, the tongue will deviate TOWARD the
affected side
muscles of mastication are innervated by - ANSWER✔✔-Mandibular Division of the
Trigeminal Nerve (V3)
When the condylar head is fractured, what keeps it in the mandibular fossa? -
ANSWER✔✔-= Temporomandibular Ligament
What muscle contracts during lateral excursive movements? - ANSWER✔✔-= the one
lateral pterygoid muscle from the OPPOSITE SIDE
- so if the patient is moving their mandible to the right, the LEFT LATERAL
PTERYGOID is what contracts
Occlusion Exam 2025 Questions and
Answers
Which suprahyoid muscle are innervated by the facial nerve? - ANSWER✔✔-=
Posterior Digastric and Stylohyoid
Infrahyoid Muscles - ANSWER✔✔-= 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 bone? - ANSWER✔✔-= CEMENTUM
- Cementum has COLLAGEN fibers and CELLULAR COMPONENTS (Cementocytes)
- have Acellular and Cellular cementum
- Cementoid is laid down first
Extrinsic Tongue Muscles - ANSWER✔✔-1. Genioglossus (Hypoglossal)
2. Hyoglossus (Hypoglossal)
3. Styloglossus (Hypoglossal)
4. Palatoglossus (VAGUS NERVE)
Intrinsic Tongue Muscles - ANSWER✔✔-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 - ANSWER✔✔-= 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., malignancy), to which side will it deviate?* -
ANSWER✔✔-= TO THE SIDE OF INJURY
= if the hypoglossal nerve becomes damaged, the tongue will deviate TOWARD the
affected side
muscles of mastication are innervated by - ANSWER✔✔-Mandibular Division of the
Trigeminal Nerve (V3)
When the condylar head is fractured, what keeps it in the mandibular fossa? -
ANSWER✔✔-= Temporomandibular Ligament
What muscle contracts during lateral excursive movements? - ANSWER✔✔-= the one
lateral pterygoid muscle from the OPPOSITE SIDE
- so if the patient is moving their mandible to the right, the LEFT LATERAL
PTERYGOID is what contracts
