Dentin most regular in structure is ……..
primary dentin
* followed by secondary & tertiary dentin
Talon cusp refers to ……
the distolingual cusp of Max. molars
- becomes less conspicuous as we go from first to third molar
- The order of size of the cusps in molars from largest to smallest: ML, MB, DB, DL, Carabelli
Which teeth oppose only one tooth in the permanent dentition?
- Lower centrals oppose the upper centrals only
- Upper third molars oppose the lower third molars only
* Lower third molars oppose the upper second and third molars
The premolar that is most like a molar is …..
Mand. second premolar
Distal curvature of roots in Mand. molars is more pronounced in ………
mesial root
- distal root is straight
- Also, the mesial root has a proximal concavity, which may separate the mesial root in two roots. This is not the case with the distal root (which also may have a concavity)
The most vertical tooth in the mouth is …….
Max. central incisor
* Note that: the lateral incisor is mesially inclined. The Max. canine is distally inclined, so is the first molar
The buccal cusp of the Mand. first premolar occlude in ……
the mesial marginal ridge of the counterpart only (barely touches the Max canine)
A cross section of the Max. canine at the cervical line level shows ………
an oval shape, with slightly wider labial surface
* Same for the Mand. canine
Anodontia and oligodontia may be caused by ………
ectodermal dysplasia
If the Mand. first molar would have a third root in a rare cases, that root would be ……..
a distal root
A cross section of the Max. lateral incisor at the cervical line level shows ………
round cross section (same for the central)
- Note that: the pulp chamber shape from this level upward is flattened buccolingually to follow the crown profile
- Mand. centrals and Max. & Mand. canines have oval pulp cross section (wide buccolingually)
The last tooth to calcify is ……., which occur at about …….
No tetracyclin for children under that age
third molars
8 years
Nasmyth’s membrane, or ( ….. ) is …..
inner enamel cuticle
final layer laid down by the ameloblasts on the enamel surface (it is acellular & adherent)
* The cuticle is covered by another acellular layer from the dental sac.
* Those layers are found only during the eruption period, then they wear away
The zygomatic process is the result of fusion of …….
the temporal & zygomatic bones
Contact of the Mand. lateral incisor with the Mand. canine is at …….
incisal third (their height of contour is at the incisal third)
Dens in dent is ……
malformation most likely resulting from an infolding of the dental papilla during tooth development or invagination of all layer of the enamel organ in dental papillae.
* Most affected tooth is the Max. lateral incisor
The premolar viewed from the facial, has a longer mesial cusp ridge than distal cusp ridge is …..
Max. first permolar
Teeth that are least likely to get caries are ……..
Mand. anterior teeth
- due to: tongue cleansing action, abundant saliva, and mostly smooth surface
- Normally, the last tooth in the mouth is the Mand. canine
Marrow space in the alveolar bone is usually …….
yellow marrow (fat) * Red marrow exists in the ramus & condyle
The lingual ridge is more pronounced on …….
the maxillary canine than on the mandibular
* The Max. canine has more distinct lingual anatomy
The tooth most likely to be successfully rotated during exodontia is the:……
Max. anterior teeth (especially the central)
* Mand. anterior teeth usually are flattened mesiodistally, so buccolingual movement is used instead of rotation
Two roots are a fairly rare occurrence in canines, but are occasionally found in ……
the mandibular canine
The most numerous cell type of the dental pulp is the ……
fibroblast
* Pulp is a connective tissue
Submucosa is always found beneath …….
lamina propria
* Never between the epithelium & lamina propria
