Exam 1 Review Flashcards
(40 cards)
How many permanent teeth are there and what is in each quadrant?
32 Permanent Teeth
- Central Incisor
- Lateral Incisor
- Canine
- First Premolar
- Second Premolar
- First Molar
- Second Molar
- Third Molar
What is the portion of a tooth that is clinically visible?
Clinical crown
The ridges that descend from the tips of the cusps of ONLY posterior teeth and travel toward the central part of the occlusal surface are called what?
Triangular Ridges
What are triangular ridges on the facial cusps and lingual cusps called?
Only called Triangular Ridges
What kind of ridge is referred to as a “special kind” of transverse ridge? And why is it special?
Oblique Ridge
Union of the triangular ridge of the distofacial cups and the distal cusp ridge of the mesiolingual cusp across the facial-lingual perimeter.
What are on the margins of borders of the lingual surface of anterior teeth? (rounded borders of enamel)
Marginal Ridges
What are the raised or convex contours on the lingual surfaces of posterior teeth called?
Lingual Heights of Contour
What are the properly named developmental pits?
- Facial Pit
- Mesial triangular pit
- Distal triangular pit
- Central pit
- Lingual pit
What is the junction of the mesial surface with the incisal surface called on anterior teeth?
Mesioincisal Line Angle (MI)
What is the last primary tooth to begin calcification and when?
Maxillary 2nd Molar at 19 weeks in utero
At birth, what crowns have completely formed and what teeth have begun calcification?
Have completely formed:
- Primary mandibular first molar crowns
- Primary mandibular central incisor crowns
Begun Calcification:
- Both permanent mandibular/maxillary first molars
What are the first permanent teeth to erupt and the last to erupt and when?
First:
- 1st Molar at 6 years
Last:
- 3rd Molars at 19 years
What are the main primary dentition eruption facts?
- ** Initial mineralization of the Primary Dentition is entirely prenatal
- Calcification begins at about 13-16 weeks in utero
- All primary teeth have initiated calcification at 18-20 weeks in utero
- Primate space begins to form at 4 yrs
- Primary tooth occlusion is evident at age 3
According to the Tritubercular Molar Cusp Theory, Which particular cusps are present in all forms of teeth in the mandible? Maxilla?
- Maxilla = Protocone
- Mandible = Protoconid
From a proximal view, the long axis to the permanent maxillary teeth that deviates the most from the respective vertical axis is what? And which one deviates the least? By how much?
Most: Maxillary Central Incisor = 28 degrees
Least: Maxillary First Premolar = 5 degrees
What is the lingual surface height of contour of the mandibular second premolar?
0.75 mm - in the middle third
- Which teeth have more height of curvature of the cervical line?
- What is the relationship between: the height of curvature of the cervical line, the size of the cervical and occlusal/incisal embrasures, and the cervico-incisal or cervico-occlusal height of the contact area?
- Which teeth have less height of curvature (the mandibular posterior teeth or the maxillary anterior teeth)?
- Maxillary Teeth
- There is a correlation
- The mandibular posterior teeth have less height of curvature than the anterior teeth.
** Never will see a posterior tooth with a higher height of curvature than anterior **
How do the roots of the primary teeth differ from the permanent teeth?
- Longer root lengths relative to the crown heights
- Apices are more pointed
- Minimal root angulation is exhibited
- Mesial roots are more curved than distal roots
On the Occlusal view of the Primary Mandibular First Molar - what is the largest and smallest cusp size?
- Smallest - Distolingual
- Largest - Mesiofacial
On the mesial view of the Permanent Mandibular Lateral Incisor - The crest of the facial cervical ridge will be at a _________ level incisally than the crest of the lingual cervical ridge?
Higher level
On the incisal view of the Permanent Maxillary Canine -
- The mesiofacial line angle is significantly ________________ than the distofacial line ange.
- What part of the crown appears “stretched” or elongated or pinches in order to make contact with the mesial of the maxillary first premolar?
- More Developed
- Distal Portion
In the facial view of the Permanent Maxillary First Premolar -
- Describe the cusp tip?
- How is the cusp tip positioned to the mesiodistal long axis bisector?
- How does the mesial cuspal ridge of the facial cusp compare to the disal cuspal ridge?
- Which cusp is taller, the facial or lingual?
- Relatively pointed
- Slightly distal
- Mesial cuspal ridge is LONGER than distal cuspal ridge
- Facial cusp tip is TALLER
In the mesial view of the Permanent Maxillary First Premolar -
- The mesial cuspal ridges of the facial and lingual cusps converge __________ ?
- The crest of the mesial marginal ridge is almost ___________ to the faciolingual long axis bisector and is divided into a facial and lingual segment by the (3.)_________________ ?
- Cervically
- Perpendicular
- Mesial Marginal Developmental Groove
In the Occlusal view of the Permanent Maxillary First Premolar -
- The mesial segment of the outline measures ____________ than the distal outline.
- The mesial outline reflects the contour of a reverse figure 3 due to the presence of the ____________________?
- Less Faciolingually
- Mesial Marginal Ridge Developmental Groove
