Head and neck Anatomy

The roots of which of the following premolars present the greatest difficulty in endodontic therapy?

1. Max. First

2. Max 2nd

3. Mand 1st

4. Mand 2nd

1. Max. First

Which of the following characterize the roots of a mandibular first molar?

a. The roots curve toward the mesial

b. the distal root is wider faciolingually and thicker mesiodistally.

c. the root surfaces have longitudinal grooves

d. the distal root is shorter and straighter than the mesial root.

5. c and d

   c. the root surfaces have longitudinal grooves

   d. the distal root is shorter and straighter than the mesial root.

a maxillary right first premolar has a 5mm pocket around the entire root. During instrumentation, longitudinal development grooves would probably be noted on which of the following root surfaces?

1. Lingual

2. mesial

3. facial

4. palatal

2. Mesial

of the following, the root depression that often can be instrumented from the lingual aspect only is on the mesial of a:

1. Max molar

2. Mand molar

3. Max Premolar

4. Mand premolar

1. Max molar

Embrasures are observed when two adjacent teeth are in contact. In a normal dentition:

1. The occlusal emb is the greates

2. The ling emb is the greatest

3. the buccal embr is the greatest

4. no difference

2. The ling emb is greatest

Primary molars differ from permanent molars in that promary molars have:

1. less bulbous crowns

2. more pits and fissures

3. greater divergence of roots

4. none of the above

3. greater divergence of roots

Mandibular teeth are vascularized by branches of which arteries?

1. Facial

2.Labial

3.lingual

4.Maxillary

4. Maxillary

Which of the following premolars is most likely to have two roots?

1. Max first

2. max second

3. mand first

4. mand second

1. Max first

The mesial root surface of a maxillary first premolar is particularly difficult to plane ….

1. difficulty in obtaining a good fulcrum

2. the deep grooving often present

3. the bulging of the crown of the adjacent canine

4. the hard, flinty plates of calculus often present

2. the deep grooving often present

The cementoenamel junction on proximal surfaces of the anterior teeth is shaped:

1. concave coronally

2. convex coronally

3. convex mesially

4. convex distally

2. convex coronally

Which of the following incisors is most likely to have a carious lingual pit?

1.Max laterial

2.max central

3.mand lateral

4.mand central

1.Max laterial

In examining the permanent teeth in intercuspal position from a facial view, which of the following relations would be noted for a patient with normal occlusion?

A. each tooth occludes with two opposing teeth

b. the maxillary arch is wider than the mandibular arch producing acceptable horz. overjet

c. the mand posterior teeth are anterior to the max posterior teeth.

d. the interproximal spaces in the maxillary and mandibular arches coincide only at the midline.

3. b, c and d

   b. the maxillary arch is wider than the mandibular arch producing acceptable horz. overjet

   c. the mand posterior teeth are anterior to the max posterior teeth.

   d. the interproximal spaces in the maxillary and mandibular arches coincide only at the midline.

Secretion from the parotid gland through the parotid duct enters the oral cavity opposite the:

1. max molar area

2. mand molar area

3. max premolar area

4. mand incisor area

5. mand premolar area

1. max molar area

Which of the following is NOT generally considered to be a muscle of mastication?

1.temporalis

2.Lateral pterygoig

3.baccinator

4. medial pterygoid

5.masseter

3.baccinator

Which of the following statements are correct with respect to swallowing?

a. hyoid bone must be raised

b. both opening and closing muscles of the mandible are active at approximately the same time

c. posterior portion of the tongue comes forward

1. a and b

Accumulation of food in the left vestibule might suggest malfunction of the

1.Buccinator

2.risorius

3.oricularis oris

4.medial pterygoid

5.levator angui

1.Buccinator

Damage to the facial nerve within the parotid gland may cause:

1.drooping of the lips on the same side.

2.spasm of the muscles of mastication

3.loss of some taste sensation

4.partial anesthesia of cheeck

5.a dry mouth

1.drooping of the lips on the same side.

Which of the following arteries does NOT accompany the corresponding nerve throughout its course?

1. lingual

2. infra orbital

3. inferior alveolar

4. posterior superior alveolar

1. lingual

Branches of which of the following arteries supply the mandibular teeth?

1. Facial

2. labial

3. maxillary

3.maxillary

Which of the following muscles of mastication is often hypertrophied as a result of chronic bruxism?

1.masseter

2.temporal

3.bussinator

4.medial pterygoid

5.lateral pterygoid

1.masseter

The floor of the mouth and the tongue receive their blood supply by way of which of the following arteries?

1.facial

2.Lingual

3.myohyloid

4. maxillary

2.Lingual

The parotid duct pierces which of the following muscles prior to entry into the oral cavity?

1.masseter

2.mylohyoid

3.buccinator

4.medial pterygoid

3.buccinator

Accumulation of food in the left vestibule might suggest malfunction of which of the following muscles?

1.buccinator

2.risorius

3.orbicularis oris

4.medial pterygoid

5.levator anguli

1.buccinator

The lateral pterygoid muscle inserts into the:

1.Coronoid Process

2.articular eminence

3.mandibular condyle

4.angle of the mandible

5.internal oblique ridge

3.mandibular condyle

The incisive foramen is associated with which of the following nerves?

1.mental

2.nasopalatine

3.greater palatine

4.inferior alveolar

2.nasopalatine

Which of the following nerves or branches of nerve contains pain fibers affected by disturbances of the temporomandibular joint?

1.chorda tympani

2.auriculotemporal

3.zygomaticotemporal

4.temporal branch of the facial nerve.

2.auriculotemporal

Which of the following are contained within the sheath of the lingual nerve as it passes medial to the mandible in front of the mandibular foramen?

1.sensory fibers to the lip

2.motor fibers to the masseter muscles

3.parasympathetic motor secretory fibers to the submandibular gland.

4.special sense fibers to the anterior 2/3 of the tongue

5.somatic sensory fibers to the posterior 1/3 of the tongue.

4.special sense fibers to the anterior 2/3 of the tongue

The maxilar Premolars are inervated by:

1.minor palatine nerve

2.middle superior alveolar nerve

3.anterior alverolar nerve

4.posterior alverolar nerrve

2.middle superior alveolar nerve

Which of the following muscles receives its innervation from the facial nerves?

1.temporal

2.masseter

3.buccinator

4.tensorl veli palatini

5.lateral pterygoid

3.buccinator

The hypoglossal nerve supplies the:

1.mucous membrane of the anterior 2/3 of the tongue

2.muscles of the tongue

3.mucous membrane of the floor of the oral cavity

4.sublingual gland

2.muscles of the tongue

Loss of sensation in the tongue indicates damage to which of the following nerves?

1.lingual

2.hypoglossal

3.chorda tympani

4.inferior alveolar

1.lingual

Before a dentist extracts a maxillary second molar, which of the following nerves or their terminal branches would he anesthetize?

1.posterior alveolar and nesopalatine

2.posterior superior alveolar and greater palatine

3.anterior superior alveolar, nasopalatine and greater palatine

4.middle superior alveolar and greaterpalatine.

2.posterior superior alveolar and greater palatine

Which of the following teeth would the dentist usually anesthetize by block-type injection prior to cavity prep?

1.Max premolars

2.max canine

3.max incisors

4.mand molars

5.mand incisors

4.mand molars

Which of the following structures are found in the pterygomandibular space?

a.lingual nerve

b.lingual artery

c.hypoglossal nerve

d.inferior alveolar artery

e.sphenomandibular ligament

3. a,d and e

   a.lingual nerve

   d.inferior alveolar artery

   e.sphenomandibular ligament

Which of the following muscles protrude the mandible?

A. Lateral pterygoid

B.Medial pterygoid

C.Masseter

D.Temporalis

E. Anterior belly of diagastric

A. Lateral pterygoid

General sensation on the anterior 2/3 of the tongue is supplied by which of the following nerves?

A. Hypoglossal

B.Lingual

C.Chorda Tympani

D. Glossopharngeal

E. Lesser petrosal

B.Lingual

Tension of Which of the following muscles makes it difficult to work on the patient’s lower anterior teeth?

A.Platysma

B. Mylohyoid

C.Buccinator

D. Oricularis Oris

E.Mentalis

E.Mentalis

Damage to which of the following nerves might cause taste impairment from the anterior 2/3 of the tongue?

A.Vagus

B.Chorda Tympani

C. Inferior Alveolar

D. Glossopharyngeal

E. Lesser superficial petrosal

B.Chorda Tympani

The temporalis muscle inserts into the:

A. Coronoid process

B. Condyle

C. Hamular notch

D. Articular Disc

E. mandibular triangle

A. Coronoid process

Which of the following premolars has three cusps?

A. Maxillary first

B. Maxillary second

C, Mandibular first

D. Mandibular Second

D. Mandibular Second

I normal Class I occlusion, the maxillary second premolar occludes with the mandibular:

A. First molar

B. First Premolar

C.First and second preloars

D. Second premolar and first molar

D. Second premolar and first molar

The lacrimal,frontal,nasociliary and infratrochlear nerves are branhces of the

A. facial nerve

B. abducent nerve

C. Trochlear nerave

D. opthalmic nerve

E. oculomotor nerve

D. opthalmic nerve

The furcations on a maxillary first molar are the:

A. mesial and distal

B. Facial and lingual

C. facail, mesial, and distal

D. Facial, lingual, and mesial

C. facail, mesial, and distal

Which of the following bones is contained in the medial wall of the bony orbit?

A. parietal

B. Lacrimal

C. Zygomatic

D. Palatal

E. Temporal

B. Lacrimal

Which of the following muscles makes up the posterior tonsillar pillar?

A. palatopharyngeus

B. palatoglossus

C.tensor veli palatine

D. Levator Veli paltini

A. palatopharyngeus

Which of the following anterior teeth most frequently has two roots and what are the positions of the roots?

A. mandibular Canine- facial and lingual

B. Mandibular canine- mesial and distal

C. Max lateral incisor- facial and lingual

D. maxillary canine- mesial and distal

E. maxillary canine- facial and lingual

A. mandibular Canine- facial and lingual

Mastication is accomplished by means of impulses transmitted to the very powerful jaw muscles through the motor branch of the:

A. chora typani

B. maxillary nerve

C.trigeminal nerve

D. glossopharyngeal nerve

C.trigeminal nerve