NBDE Mastery App: Dental Anatomy
Which teeth are most likely to be involved with Ludwig's angina? - ANS Mandibular molars (mostly
mandibular 3rd)
Because the roots of it under the myohyoid line, so infection their can spread to become ludwig angina
What is ludwig's angina - ANS A life threatening cellulitis in the sublingual/submental/submandibular
space. It has a fast, bilateral onset and is polymicrobial (however streptococci are always present).
Which of the following describes the manner in which the maxillary and mandibular teeth contact? -
ANS occlusion
What is Odontomas? - ANS benign unerupted tooth or tumor
Dens in dente? Usually what teeth has this - ANS crown is invaginated, usually in maxillary lateral
incisors.
What is an enameloma? - ANS Enamel pearls or round enamel projection on a root surface
Enamel pearls
1) Where is it usually seen on a tooth
2) What teeth is it not common on
3) Where are they most likely found
,4) Formed from what?
4) Enamel pearls are associated with? - ANS a) Round opaque mass on furcated root
Not common in teeth with a single root.
Most commonly found on maxillary and mandibular 3rd molar roots
Formed from the Hertwig's Epithelial root sheath
May be associated with development or severity of periodontal disease
What is Cervical enamel projections - ANS Apical extension of enamel usually located at furcation on Md
2nd Molars
Function of:
1) Incisors
2) Canines
3) Premolars
4) Molars - ANS Incisors: cutting and biting
,Canines: shredding and tearing
Premolars: chewing and grinding mostly, some ripping and tearing
Molars: crushing, grinding and chewing
The DB cusps of mandibular 2nd molar occludes with what on the opposing teeth? - ANS Distobuccal
cusps of mandibular 2nd molars occlude against the distal triangular fossa of the maxillary 2nd molar
Viewed from the incisal aspect of anterior teeth the, what embrasure is visible? - ANS facial and lingual
embrasures are visible
Viewed from the occlusal aspect of posterior teeth, what embrasure is visible? - ANS the buccal and
lingual embrasures are visible
(occlusal aspect refers to posterior teeth)
Viewed from the facial or lingual aspects of teeth, what embrasure is visible? - ANS the incisal (occlusal)
and cervical (gingival) embrasures are visible.
The term facial describe? - ANS Labial and Buccal
However, buccal only describes posterior and labial only describe anterior
What is the cervical line? - ANS Line where enamel and cementum meet. It separates the anatomical
crown and the anatomical root (aka CEJ)
, Primary dentition roots are formed by? - ANS Hertwig's sheeth (hertwig is a tree)
In the primary dentition, when does root resorption begin? - ANS 1 year before tooth exfoliates
Osteoclasts in the PDL begin the process of root resorption about one year before the tooth exfoliates
What is bennett's movement? - ANS the left and right condylar motions caused by lateral movements of
the mandible
What is bennett's shift - ANS the lateral movement of the mandible towards the working side during
lateral excursions
What is bennett's angle? - ANS the angle obtained after the NON-WORKING side condyle has moved
anteriorly & medially, relative to the sagittal plane. The flatter the cusp, the greater the side shift
What is normally the smallest molar in the mouth? - ANS Max 3rd molar
The crown of a maxillary 3rd molar is almost always: - ANS wider buccolingually than mesiodistally
A permanent mandibular molar that has a single fused root, a distal cusp, and a DB groove is most likely
which of the following teeth?
Mulberry molar
Type II 3rd molar
Which teeth are most likely to be involved with Ludwig's angina? - ANS Mandibular molars (mostly
mandibular 3rd)
Because the roots of it under the myohyoid line, so infection their can spread to become ludwig angina
What is ludwig's angina - ANS A life threatening cellulitis in the sublingual/submental/submandibular
space. It has a fast, bilateral onset and is polymicrobial (however streptococci are always present).
Which of the following describes the manner in which the maxillary and mandibular teeth contact? -
ANS occlusion
What is Odontomas? - ANS benign unerupted tooth or tumor
Dens in dente? Usually what teeth has this - ANS crown is invaginated, usually in maxillary lateral
incisors.
What is an enameloma? - ANS Enamel pearls or round enamel projection on a root surface
Enamel pearls
1) Where is it usually seen on a tooth
2) What teeth is it not common on
3) Where are they most likely found
,4) Formed from what?
4) Enamel pearls are associated with? - ANS a) Round opaque mass on furcated root
Not common in teeth with a single root.
Most commonly found on maxillary and mandibular 3rd molar roots
Formed from the Hertwig's Epithelial root sheath
May be associated with development or severity of periodontal disease
What is Cervical enamel projections - ANS Apical extension of enamel usually located at furcation on Md
2nd Molars
Function of:
1) Incisors
2) Canines
3) Premolars
4) Molars - ANS Incisors: cutting and biting
,Canines: shredding and tearing
Premolars: chewing and grinding mostly, some ripping and tearing
Molars: crushing, grinding and chewing
The DB cusps of mandibular 2nd molar occludes with what on the opposing teeth? - ANS Distobuccal
cusps of mandibular 2nd molars occlude against the distal triangular fossa of the maxillary 2nd molar
Viewed from the incisal aspect of anterior teeth the, what embrasure is visible? - ANS facial and lingual
embrasures are visible
Viewed from the occlusal aspect of posterior teeth, what embrasure is visible? - ANS the buccal and
lingual embrasures are visible
(occlusal aspect refers to posterior teeth)
Viewed from the facial or lingual aspects of teeth, what embrasure is visible? - ANS the incisal (occlusal)
and cervical (gingival) embrasures are visible.
The term facial describe? - ANS Labial and Buccal
However, buccal only describes posterior and labial only describe anterior
What is the cervical line? - ANS Line where enamel and cementum meet. It separates the anatomical
crown and the anatomical root (aka CEJ)
, Primary dentition roots are formed by? - ANS Hertwig's sheeth (hertwig is a tree)
In the primary dentition, when does root resorption begin? - ANS 1 year before tooth exfoliates
Osteoclasts in the PDL begin the process of root resorption about one year before the tooth exfoliates
What is bennett's movement? - ANS the left and right condylar motions caused by lateral movements of
the mandible
What is bennett's shift - ANS the lateral movement of the mandible towards the working side during
lateral excursions
What is bennett's angle? - ANS the angle obtained after the NON-WORKING side condyle has moved
anteriorly & medially, relative to the sagittal plane. The flatter the cusp, the greater the side shift
What is normally the smallest molar in the mouth? - ANS Max 3rd molar
The crown of a maxillary 3rd molar is almost always: - ANS wider buccolingually than mesiodistally
A permanent mandibular molar that has a single fused root, a distal cusp, and a DB groove is most likely
which of the following teeth?
Mulberry molar
Type II 3rd molar
