Dental Diseases 1 Flashcards
What is normal occlusion?
Scissors bite
The shelf on the palatal surface of max. incisors where mand. incisors occlude to “rest”
Cingulum
Occlusion may be normal but some teeth are displaced (neutroclusion)
Class 1
Cross-bite (rostral more common), base narrow canines
Class 1
Malpositioned teeth, jaw length normal
Class 1
Mandibular disoclussion
Class 2
Changes in length of jaw - mandible shorter than it should be
Class 2
Parrot mouth, overshot
Class 2
Mandibular mesiocclusion
Class 3
Changes in length of jaw - mandible longer than it should be
Class 3
Undershot
Class 3
Asymmetrical skeletal malocclusion
Class 4
Maxillary bones close early and cause a shift in bite
Class 4
Wry bite
Class 4
Which side of the mouth are deciduous teeth compared to adult teeth and which tooth is the exception?
Deciduous buccal, adult lingual except maxillary canine teeth
Rostrally displaced adult canine tooth most commonly seen in Shelties
Lance tooth
Incisor crowns meet - considered a type of prognathism
Level bite
Level bite
Class 3
Unequal arch development
Wry bite
How can you tx base-narrow canines and what is a side effect?
Maxi-temp acrylic may cause ulcers (easily treated)
What causes retained deciduous teeth?
Failure of primary tooth root to undergo resorption
What breeds and which teeth are commonly associated w/retained deciduous teeth?
Toy breeds, canines and incisors
Retained deciduous _____ can cause base narrow canines
Mandibular canine teeth
In what breeds is crowing most common and which tooth is most commonly affected?
Brachycephalics, max. PM3
Which teeth are most often affected by polydontia?
Maxillary I/PM
Which tooth is most often affected by supernumerary roots?
Max PM3
What is the primary ddx of supernumerary roots?
Twinning/gemination
Tooth has extra root of normal size and an extra cusp
Supernumerary roots
Joining of 2 teeth: one crown and 2 roots
Fusion
Will have less than normal number of teeth in arch
Fusion
Incomplete splitting of 2 teeth: 2 crowns and 1 root
Gemination
Which teeth are truly missing if a patient has anodontia?
I or PM
Tooth completely displaced into the nasal cavity
Intrusive avulsion
Which breeds are most commonly affected by impacted teeth and which tooth is most commonly affected?
Brachycephalics, mand. PM1
What causes impacted teeth?
Lack of space in dental arch or misalignment of tooth bud
When will an impacted tooth possibly have a better chance of erupting?
If overlying gingiva and alveolar bone is removed
What is the most obvious clinical sign of dentigerous cyst?
Blue hue to swelling
Fluid filled cyst surrounding crown of unerupted tooth
Dentigerous cyst
How does a dentigerous cyst form?
Persistence of portions of the enamel forming epithelium even though the tooth is unerupted
