Midterm Review Flashcards
More incisal ridge faceting on labial of mandibular incisors versus lingual of maxillary incisors.
Incisal Wear
What are some variations in mandibular molars cusps?
- Tuberculum intermedium (possilble extra lingual cusp)
- Tuberculum septum (extra cusp [tuburcle] on distal marginal ridge of first molar)
Dentition Traits of all Primary Teeth (Compared to Secondary)
- Smaller than secondary teeth of same name
- Marked cementoenamel junction (CEJ) constriction and cervical crown bulges
- Relatively longer roots compared to crowns
- More wear since there is less mineralized
- Thinner enamel and dentin layers
- Whiter
- Few anamolies
Order of Emergence of Permanent Dentition
- Central incisors
- Lateral incisors
- First Premolars
- Second Premolars
- First molars
- Second molars
- Third molars
Healthy Periodontium Characteristics
- Alveolar bone
- Tooth root surface
- Periodontal ligament (apical, oblique, horizontal, alveolar crest, free gingival, and transseptal fibers [from one tooth to a neighboring tooth]
- Gingiva (free gingiva with sulcus, keratinized)
Pulp horns of anterior teeth
- incisors often have three pulp horns (mesial, central, distal) correlating with three facial lobes and three mamelons
- peg lateral incisors (forming from one lobe) are more likely to have only one pulp horn
- canines have one pulp horn under the one cusp
Pulp chamber and horns in premolars
- one pulp horn per functional cusp; two horns
- mandibular first premolars: functionless lingual cusp may have only one pulp horn
- mandibular second premolars: three cusps, three pulp horns
Root Canal and Orifices of molars
- maxillary molars: three roots and four canals (two in mesiobuccal root), and four orifices in the chamber floor
- mandibular molars: two roots and three canals (two in mesial) and three orifices in the chamber floor
Pulp shape in primary teeth
- similar to adult dentition
- pulp larger than on secondary teeth
- thinner enamel and dentin
- pulp closer to external surface
Why pulp cavities get smaller in older teeth
- deposit of secondary dentin as we age
- new dentin forms as reaction to injury
- calcium hydroxide base can be used to stimulate additional dentin
Anterior Dental Malocclusion
- anterior teeth are in edge-to-edge relationship since the incisal edges of both arches line up
- teeth are in an open-bite relationship since incisal edges of both arches do not touch or overlap vertically when all posterior teeth are in contact
Class II malocclusion, division I
division I may exhibit considerable anterior over jet
-often with all maxillary incisors tipped labially
Class II malocclusion, division II
division II exhibits deep overbite with maxillary central incisors tipped lingually, but lateral incisors tipped labially
Class I caries
pits and fissures occur: occlusal, buccal and lingual surfaces
Class II caries
smooth surface on proximal surfaces, posterior teeth
