Tooth Changes and Occlusion Flashcards
Describe abrasion
pathological wearing away through abnormal MECHANICAL activity
ex// toothpicks, pins
Describe erosion
loss of tooth substance due to CHEMICAL action
ex// carbonated drinks, soda, chronic vomiting
Describe attrition
wearing away due to tooth to tooth contact
*generalized throughout the mouth
ex// bruxism, increase of usage with age
Describe wear facets
polished cusp tip/ridge secondary to a parafunctional habit
*localized, seen on specific areas not whole mouth
ex// tooth grinding
Describe abfraction
aka NCCL (non carious cervical lesions)
enamel pops off at cervical areas due to forces during tooth flexure
ex// grinding, clenching, malocclusion
What is the canine relationship in Class I occlusion
mx canine w distal half of mn canine and mesial half of mn first premolar
What is the molar relationship in Class I occlusion
mx mesiobuccal cusp occludes with buccal groove of mn first molar
What is the canine relationship in Class II occlusion
distal half of mn canine distal to mesial half of mx canines by the width of a premolar
What is the molar relationship in Class II occlusion
mn groove is distal to the mx mesiobuccal cusp of mx first molar by at least the width of a premolar
Class II Division I
max incisors are protruded
Class II Division II
max incisors retruded, with laterals protruded
What is the canine relationship in Class III occlusion
distal half of mn canine is mesial to the mesial half of mx canine by at least the width of a premolar
What is the molar relationship in Class III occlusion
buccal groove of mn first molar is mesial to the mesiobuccal cusp of of mx first molar by at least the width of a premolar
Where are primate spaces typically seen in the primary dentition
max: between canine and first molar
mand: between lateral incisor and canine
Openbite
lack of contact between the anterior teeth
