Quiz #1 Flashcards
What is the junction or separation between the crown and the root called?
Cementoenamel junction (CEJ, Cervical Line)
____ covers the root while ____ covers the crown.
Cementum, enamel
On the lingual surfaces of posterior teeth, the raised or convex contours ____ (are/are not) called ridges. Their official name is ____. These contours on the lingual surface ____ (are/are not) in the cervical part of the crown.
are not, Lingual Heights of Contour, are not
____ are irregular depressions or concavities that are unique to the lingual surfaces of canines. They divide the lingual fossa of canines into separate ____ and ____ fossae.
Lingual Fossae on canines, mesiolingual, distolingual
____ are lines on the surface of a ___ tooth that ___ (does/does not) divide the primary portions of a tooth.
Supplemental (secondary) grooves, posterior, does not
Supplemental grooves will usually not be ___ because they may not always consistently appear on the surface of the tooth. Many times, they will separate ____ ridges from ___ ridges on the same cusp.
named, triangular, cuspal
If present, supplemental grooves are named according to their ___.
location
The last primary tooth to erupt is ___ (tooth number ___) at ___ months.
Maxillary 2nd Molar (M2), A, J, 29 months
The first primary tooth to erupt is ___ (tooth number ___) at ___ months.
Mandibular central incisor, P, O, 8 months
At __ months of age, all of the primary teeth have emerged except for the second molars.
20
The ____ dentition period begins with the emergence and eruption of the permanent mandibular 1st molar at age ___.
transitional “mixed”, age 6
The “Mixed Dentition Period” ends with the loss of the last primary tooth, either the ____ or usually the ___ at age ___.
maxillary canine, maxillary second molar, age 11-12
The permanent 1st molars are guided by and emerge ____ to the primary 2nd molars.
distal or posterior
Premature loss of primary teeth may lead to a lack of ___ for the permanent dentition.
space
What 3 things will have an adverse effect on the eruption of the permanent dentition?
Dental neglect, congenital absence, anomalies
What is the order of eruption of Maxillary Permanent Teeth?
- 1st Molar (3, 14)
- Central (8, 9)
- Lateral (7, 10)
- 1st Premolar (5, 12)
- 2nd Premolar (4, 13)
- Canine (6, 11)
- 2nd Molar (2, 15)
- 3rd Molar (1, 16)
The maxillary ___ lag in eruption compared to the remaining maxillary ___ teeth and maxillary ___.
canines, anterior, premolars
At 8 years of age, the dentition begins to appear “normal.” What permanent teeth are still not erupted?
Permanent 2nd Molars, premolars, canines
Humans have an arch alignment that is considered ____ and is defined as being ___.
partially isognathous, there is a degree of symmetry but not perfectly symmetrical.
Anterior Transverse Ridge is exhibited only on permanent ___ and is confluent with the ___, obliterating much of the ___ fossa.
maxillary molars, mesial marginal ridge, mesial triangular fossa
The ___ arch form dominates or influences the ___ arch form for 3 reasons. They are:
Maxillary, mandibular
- Maxillary is larger
- Maxillary is wider
- Esthetically it is more visible/important
The tooth with the most deviation from the vertical axis in the proximal view is exhibited in the ___ at an angle of __.
Lateral Incisor, 23 degrees
The tooth with the least deviation from the vertical axis in the proximal view is exhibited in the ___ at an angle of __.
Second Premolar, 6 degrees
What are the 3 items to note on occlusal antagonists in the opposing arch?
- Teeth primarily contact their namesakes in the opposing arch.
- Most teeth contact one additional tooth in the opposing arch
- The Maxillary 3rd Molar and the mandibular central incisors are the exceptions (They have only 1 antagonist)
From the midline out, what are the proximal contact areas of each tooth?
Midline: Incisal Third
Distal of Central: Junction of Incisal and Middle thirds
Mesial of Lateral: Junction of Incisal and Middle thirds
Distal of Lateral: Middle third
Mesial of Canine: Junction of Incisal and Middle thirds
Distal of Canine: Middle third
For the height of contour of the mandibular arch:
All facial surfaces = __ mm located in the ____.
0.5, cervical third
For the height of contour of the mandibular arch:
Mandibular anterior teeth lingual surface amount of contour and location = __ mm located in the ____.
0.5, cervical third
For the height of contour of the mandibular arch:
Mandibular first premolar teeth lingual surface amount of contour and location = __ mm located in the ____.
0.5, middle third
For the height of contour of the mandibular arch:
Mandibular second premolar teeth lingual surface amount of contour and location = __ mm located in the ____.
0.75, middle third
For the height of contour of the mandibular arch:
Mandibular molar teeth lingual surface amount of contour and location = __ mm located in the ____.
1.0, middle third
The cervical line curves in a ___ direction on the ___ surface.
coronal, proximal
The measurement of the height of the curvature of the cervical line is from the ___ point to the ___ point in the middle of the proximal surface.
lowest, highest
The ___ teeth have the most measurable curvature. The ___ have little or no curvature.
anterior, molars
On an individual tooth, the curvature is always greatest on the ___ side. The mesial of the maxillary central is __ mm. The distal of maxillary central is __ mm.
mesial, 3.5 (largest), 2.5
____ will affect the integrity of the periodontal fibers at level of the cervical line (circumferential, alveolar crest, transseptal, horizontal and oblique) and lead to a degradation of the crest of the alveolar bone.
Periodontal disease
____ are the negative anatomy resulting from an overlapping of enamel at the cervical third. They run parallel to the cervical line.
Imbrication lines
____ are positive anatomy or the actual enamel ridges that define the imbrication lines.
Perikymata
imbrication lines and perikymata are mostly seen on permanent ___.
maxillary central incisors
In the mandibular arch, contact areas are both slightly more to the ____.
____ outlines of crowns are less curved than ____ outlines. ____ cusps are more pointed than ____ cusps.
____ cusps are larger than ____ cusps.
____ marginal ridges are taller than ____ marginal ridges.
facial Mesial, distal Lingual, facial Mesial, distal Mesial, distal
