intro Flashcards
when would you preform an incision biopsy
lesion >1 cm
polymorphic
suspicious for malignancy
in area with high morbidity
when would you preform an excision biopsy
lesion < 1cm
vascular lesion
pigmented
t/f. in an excision biopsy, you only remove the lesion
false. you remove the lesion and perimeter of surrounding, uninvolved tissue
impacted tooth
tooth that fails to erupt into the dental arch within the expected time
what can potentially prevent a tooth from erupting
adjacent teeth, dense bone, excessive soft tissue
most commonly impacted teeth
mand 3rds M, max 3rd M, max canines
classification of angulation of impacted teeth
mesioangular (least difficult), horizontal, vertical, distoangular (most difficult)
what does the Pell and Gregory classification tell you
relationship to the ant border of the ramus and to the occlusal plane
class 1 P&G classification
normal position ant to the ramus
class 2 P&G classification
1/2 of crown is within ramus
class 3 P&G classification
entire crown is embedded within the ramus
class A P&G
tooth at same plane as other molars
class B P&G
occlusal plane of 3rd molar is between the occlusal plane and the cervical line of the 2nd molar
class 3 P&G
the 3rd molar is below the cervical line of the 2nd molar
unerupted teeth
impacted teeth and teeth that are in the process of erupting