1
The periodontal ligament (PDL) is made up primarily of which kind of tissue?
Connective tissue
Radiographically, the lamina dura appears
As a white or clear line, or radiopaque
Four tissues in order, from most mineralized to least mineralized
enamel, dentin, cementum, bone
The alveolar bone found between two roots of a single tooth is known as the:
interraddicular septum
Plates of compact bone found on the facial and lingual surfaces of the alveolar bone are what type of bone?
Cortical bone
The attached gingiva is firmly attached to the alveolar bone; the alveolar mucosa is firmly attached to the alveolar bone. (True or false)
The first statement is true; the second statement is false.
The cell body of the odontoblast is found:
In the pulp.
The interdental ligament extends from cementum to bone; the interradicular fibers of the alveolodental ligament extend from cementum to cementum. (true or false)
The first statement is false; the second statement is true.
Sharpey's fibers are located in which of the following dental tissues?
Cementum
Three functions of the periodontal ligament (PDL):
The mineral that makes up most of the inorganic portions of tooth structure and alveolar bone is:
Calcium hydroxyapatite
The eruption date of the permanent maxillary central incisor is:
7-8 years old
Root completion of permanent teeth occurs approximately how many years after tooth eruption?
3 years
Which of the following features are located on the lingual surfaces of all permanent anterior teeth?
Marginal ridges, cingulum
Which tooth exhibits a "U"-shaped or "H"-shaped groove pattern on its occlusal surface?
Mandibular second premolar, two cusp type
Which tooth has a poorly developed lingual cusp, resembling the cingulum of a canine?
Mandibular first premolar
The maxillary first premolar is most often bifurcated; the maxillary second premolar is more likely than the maxillary first premolar to have supplemental grooves. (true or false)
Both statements are true.
A transverse ridge is formed by the:
Buccal triangular ridge and the lingual triangular ridge
Which tooth has a distolingual developmental depression?
Mandibular second premolar, two-cusp type
The most common form of mandibular second premolars has how many cusps?
3
The distolingual cusp of the three-cusp type of mandibular second premolar is larger than the mesiolingual cusp of the three-cusp type of premolar; the two-cusp type of mandibular second premolar has a mesiolingual groove. (true or false)
Both statements are false.
The lingual cusp/cuspal planes of the maxillary premolars are________________; the lingual cusps of the mandibular premolars are____________.
Functional; non-functional
The transverse ridge on a maxillary first molar extends from where to where?
Mesiobuccal cusp to mesiolingual cusp
Of the following premolars, which is MOST likely not to form, leaving the primary molar over-retained, or present, even in the adult mouth?
Mandibular second
Which of the following features helps distinguish the maxillary right second premolar from the maxillary left second premolar?
Lingual cusp offset to mesial