Quiz 1 Review Flashcards
What is the CEJ? (Crown vs. Root)
- “The Cementoenamel Junction”
- Cervical Line
- Junction/Separation between the crown & root
- Cementum covers the root
- Enamel covers the crown
- Junction of the cementum & enamel
What are Lingual Height Contours?
On the lingual surfaces of posterior teeth, the raised or convex contours are NOT called ridges but rather “Lingual Height of Contour”
These contours on the lingual surface are NOT in the ?
Cervical part of the crown
What are Lingual Fossae on Canines?
These are irregular depressions or concavities that are unique to the lingual surfaces of canines.
What does the Lingual Fossae divide into?
They divide the lingual fossa of canines into separate mesiolingual and distolingual fossae.
What is a Supplemental (Secondary) Groove
A line on the surface of a posterior tooth that does NOT divide primary portions of a tooth (i.e cusps)
Why will a supplemental groove usually not be named?
Because they may not always consistently appear on the surface of a posterior tooth
Many times, supplemental groove will ______________
separate triangular ridges from cuspal ridges on the SAME cusp
If present supplemental grooves are named according to….?
Their location
What tooth is the LAST “primary” tooth to erupt ?
The MAXILLARY 2nd molar
-Tooth A, J
What is the Eruption time for the Maxillary 2nd molar?
29 months
What tooth is the FIRST “primary” tooth to erupt ?
The MANDIBULAR 1st incisor
-Tooth P,O
What is the Eruption time for the Mandibular 1st incisor?
8 months
At 20 months of age which teeth have not emerged into the oral cavity?
Primary 2nd molars
What is the Transitional “Mixed” Dentition period?
This period beings with the emergence & eruption of the Permanent Mandibular 1st Molar at age 6
When does the “ Mixed Dentition Period” end?
With the loss of the last primary tooth, either the maxillary canine (LESS LIKELY) or usually the maxillary second molar at age 11-12
What are the Permanent 1st Molars guided by?
They are guided by and emerge distal(behind) or posterior to the Primary 2nd Molars
When do the Permanent teeth begin their eruptive movements ?
They do not being until AFTER the CROWN is FORMED
What may the premature loss of Primary teeth lead to?
A lack of space for the Permanent dentition
What will have an adverse effect on the eruption of the permanent dentition?
Dental neglect, congenital absence, or anomalies
What is the Order of Eruption of Maxillary Permanent Canine Teeth? # 6, 11
The maxillary canines lag in eruption compared to the remaining maxillary anterior teeth and maxillary premolars
***Arch order 6
At Eight Years of Age the patient is________________?
- Out of the “early” ugly ducking stage
- The dentition “APPEARS” normal to parents
- (Premanent 2nd molars are not present, canines, and both premolars)
What is Isognathous?
Equal-jawed or symmetrical arch alignment
What is Anisognathous?
Unequal-jawed or asymmetrical arch alignment
Humans have an arch alignment that is _________?
Considered “Partially isognathous”
Where is the Anterior Transverse Ridge exhibited only on?
What does it Obliterate?
Permanent Maxillary Molars
and is confluent with the MESIAL MARGINAL RIDGE, obliterating much of the medial triangular fossa
Which arch form dominates or influences the other arch form ?
Maxillary dominates
Why does the maxillary form dominate?
1) Maxillary arch is larger than the mandible, from the distal of a third molar on one side through the middle of each tooth to the third molar on the other side
Which arch is wider or larger in measurement (leads to the domination of the arches)
The maxillary arch is wider from right to left sides
Which arch are esthetics embedded more in? (leads to another reason this arch dominates)
The maxillary arch more than mandibular arch, because the smile line is extremely evident with maxillary anterior teeth
Which of the teeth deviate the LEAST from the vertical (longitudinal) axis ? (From Proximal reference)
Mandibular Second Premolar (6 degrees)
Which of the teeth deviate the MOST from the vertical (longitudinal) axis ? (From PROXIMAL reference)
The Lateral incisor (23 degrees)
Which of the teeth deviate the LEAST from the vertical (longitudinal) axis ? (From FACIAL reference)
The MANDIBULAR Lateral incisor (0 degrees)
Which of the teeth deviate the MOST from the vertical (longitudinal) axis ? (From FACIAL reference)
Second Molar (14 degrees)
Teeth primarily contact their __________________
Their namesakes in the opposing arch
Most teeth contact one additional tooth in the ___________
opposing arch
The MAXILLARY THIRD MOLARS & MANDIBULAR CENTRAL INCISORS HAVE _____________
ONLY ONE antagonist in the opposing arch
*** Tooth 1 and 8 are the exceptions to the rest
What is the location of the proximal contacts for the Midline?
The INCISAL THIRD (1/3)
What is the location of the proximal contacts for the DISTAL of CENTRAL?
Junction of incisal and middle thirds
What is the location of the proximal contacts for the Mesial of Lateral?
Junction of incisal and middle thirds
What is the location of the proximal contacts for the Distal of Lateral?
Middle third
What is the mnemonic for the Proximal Contact Areas (Facial perspective of maxillary anterior teeth?)
I JJ MJM
All facial surfaces = _______ located in the ________
0.5 mm
Located in the cervical third
Mandibular anterior teeth lingual surface amount of contour and location = __________ and located in the _________
0.5 mm
Located in the cervical third
Mandibular first premolar teeth lingual surface amount of contour and location = ____________ located in the ________
0.5 mm
Located in the middle third
Mandibular second premolar teeth lingual surface amount of contour and location = ________________ located in the ___________________
0.75 mm
Located in the middle third
Mandibular molar teeth lingual surface amount of contour and location = ____________ located in the ____________
1 mm
Located in the middle third
Measurements of the Height of Curvature of the Cervical Line, Maxillary Arch (Mesial Aspect)
Decreases from anterior incisors to posterior molars
Measurements of the Height of Curvature of the Cervical Line, Maxillary Arch (Distal Aspect)
Decreases from anterior incisors to posterior molars
What is the cervical line curves in a coronal direction on _______________
The proximal surface
The measurements is from the lowest point at the cervical line to the________________________
the highest point in the middle of the proximal surface
Which teeth have the most measurable curvature?
The anterior teeth
Which teeth have little or no curvature?
The molars
On an individual tooth the curvature is always greatest where?
On the mesial
Which tooth is the largest (3.5mm)
The medial of the maxillary central is
The distal of maxillary central is __________
2.5mm
Regarding the periodontal fibers at the cervical line, Periodontal disease will affect the integrity of the periodontal fibers at what level of the cervical line?
- Circumferential
- Alveolar crest
- Transseptal
- Horizontal and oblique
*****LEADS to a degradation of the crest of the alveolar bone
What are the Imbrication lines?
How do they run?
- Negative anatomy resulting from an overlapping enamel at the cervical third
- They run PARALLEL to the cervical line
What are the perikymata line?
-Positive anatomy or the actual enamel ridges that define the imbrication lines
Where are Imbrication and Perikymata lines mostly seen?
On permanent maxillary central incisors
Regarding Tooth Form Generalizations (Mandibular Arch # 19- Left 1st molar) the contact areas are both ___________
Slightly more to the facial
Mesial outlines of crowns are _______________
Less curved than distal outlines
Lingual cusps are more ________________
pointed than the facial cusps
Mesial cusps are more _________
larger than distal cusps
Mesial marginal ridges are ______________
taller than distal marginal ridges
