exam 2- lecture 4 Flashcards
union of 2 separate teeth. 1 crown, 2 roots
fusion
what factors cause enamel hypoplasia?
amelogenesis imperfect
febrile illnesses
vitamin deficiency
local infection of primary tooth (turners tooth)
enamel fluoride (mottled enamel)
congenital syphilis (hutchinsons incisors or mulbery molar)
birth injury
this is when teeth can’t erupt due to physical obstruction, most commonly 3rd molars
impacted teeth
what does an OKC look like on a radiograph and how do you treat it?
well defined multiocular RL lesion, treatment: surgical excision with curettage
what is the most common cyst?
radicular cyst
congenial lack of teeth
anodontia
this is radiographically well defined radiolucent that can be uniocular or multiocular, a biopsy must be done to rule out OKC or lateral periodontal cyst. treatment: surgical removal of lesion
primordial cyst
bull teeth.. long pulp chamber and short roots on x-ray
taurodontism
who are nasolabial cysts more common in?
adults 40-50 years old, females 4 times more likely
these are ghost teeth, very thin enamel and dentin, extremely large pulp chambers and treat with extraction
regional odontodysplaisa
single tooth that tries to divide itself. 2 crowns, 1 root
gemination
this type of cyst is most commonly found in the major salivary glands and needs to be surgically excised
lymphoepitheial cyst
soft tissue cyst with no alveolar bone involvement
nasolabial cyst
when a lesion is filled with blood
eruption hematoma
abnormal pathologic sac or cavity lined by epithelium and enclosed in a CT capsule
Cyst
abnormal curve or angle in root
dilacetation
who are lateral periodontal cyst/ gingival cysts more common in? how do you treat it?
males
asymptomatically. both need to be removed surgically
extra root or bifurcated root. most commonly single rooted teeth such as canines and mandibular premolar
supernumerary roots
this develops in place of a tooth(most commonly 3rd molar region), history that the tooth was never present and occurs in young adults
primordial cyst
who is a thyroglossal tract cyst more common in and how is it treated?
females 10-30 years of age.
complete excision of cyst/tract and part of hyoid bone
“ankylosis”.. primary teeth in which bone had fused roots
ankylossed teeth
what must be done to a aneurysmal bone cyst before removal?
aspirate or can cause excessive bleeding
this forms around the crown of an unerupted or developing tooth.. the most common located is an impacted 3rd molar. on a radiograph it is well defined uniocular radiolucent around crown of unerupted or impacted tooth
follicular cyst
treatment: removal
what is total anodontia associated with?
ectodermal dysplasia
this is a void within bone that fills up in six moths to a year
simple bone cyst
enamel invaginated into crown of a tooth, most common maxillary lateral.. is vulnerable to caries, pulpal infection and necrosis. filling or endo with treatment
dens in dente
who are nasopalatine duct cysts more common in?
males 40-60 years of age
well defined RL.
Treat with excision
also known as a traumatic bone cyst, occurs in young males, and is well defined radiolucent that has scalloping around the roots of teeth
simple bone cyst
accessory cusp located in the area of the cingulum.. removed sometimes if intereference with occlusion
talon cusp
what are examples of non odontogenic cysts?
nasopalatine duct cyst
median palatine cyst
globulomaxillary cyst
median mandibular cyst
nasolabial cyst
epidermal cyst
what is the most common supernumerary teeth?
mesiodens
located in midline between centrals
tooth lies partially in bone and soft tissue
partial infection
incomplete or defective formation of enamel
enamel hypoplasia
with a benign cyst teratoma, what can be found in a wall of a lesion?
teeth, bone, muscle, and nerve tissue
treat with removal
what are the most common missing teeth?
3rd molar
maxillary lateral
mandibular 2nd premolar
located to distal of 3rd molar
distomolar
what does nasolabial cyst cause?
expansion or swelling in mucolabial fold in area of maxillary canine or floor of the nose
treat with surgical excision
unique histologic appearance that frequently recurs, most common 3rd molar region.. expansive lesion that can displace and resort teeth
odontogenic keratocyst (OKC)
who does aneurysmal bone cysts occur in?
females less than 30 yrs of age
two adjacent teeth united by cementum
concresence
located to buccal
paramolar
this is a RARE lesion, located in the midline of the mandible, well defined radiolucent below the apices of incisors. treat with excision
median mandibular cyst
this is located within the nasopalatine canal and associated with the incisive foramen or papillae an the teeth are vital
nasopalatine duct cyst
what are some types of odontogenic cysts?
follicular
eruption
primordial
odontogenic keratocyst
lateral periodontal cyst/gingival cyst
what is the most common position for impaction?
mesioangular
extra teeth
supernumerary teeth
what are the two categories of cysts?
odontogenic- related to tooth development
nonodontogenic- not related to tooth development
small spherical nodule of enamel located in trifurcation area
enamel pearl
developmental cyst often present at the birth or notes in young children
dermoid cyst
this is well defined uniocular radiolucent located in the midline of the hard palate and treat with excision
median palatine cyst
what kind of stain does tetracycline cause?
intrinsic or endogenous
this is a raised nodule in the skin of the face of neck, thought to originate from epithelium of hair follicle. treat with excision
epidermal cyst
what are the two types of cysts?
intraosseous- occurring within the bone
extraosseous- occur in the soft tissue
lack of one or more teeth
hypodontia
also known as stafnes bone cyst, well defined RL in posterior region of mandible. no treatment
static bone cyst
this is most often seen in mandibular cuspid or premolar area.. it is a uniocular or multiocular RL lesion located on lateral aspect of a tooth root
lateral periodontal cyst
this i from the foramen caecum to thyroid gland below the hyoid and presents as a smooth bulge or swelling in area of midline of neck
thyroglossal tract cyst
enamel doesn’t mature and calcify (chalky white)
enamel hypocalcification
enlargement of half the head with enlargement of the teeth on the other side
facial hemihypertrophy
smaller teeth than normal.. usually more common with one tooth for example peg lateral
microdontia
this is within the soft tissue around the crown of an erupting tooth and usually no freakin
eruption cyst
what are the classifications of impactions?
mesioangular
distoangular
vertical
horizontal
this is a vascular lesion, pesudocyst of blood filled spaces, multiocular soap bubble appearance
aneurysmal bone cyst
larger teeth than normal
macrodontia
pinkish yellow raised nodule located in the floor of the mouth or lateral borders of the tongue
lymphoepithelial cyst
this is located in the soft tissue adjacent to the lateral periodontal cyst
gingival cyst
where are dermoid cysts found?
anterior floor of the mouth
causes tongue displacement. (doughy)
this is well defined pear shaped radiolucent formed between the roots of maxillary lateral incisor or canine, teeth are vital. treatment with excision
globulomaxillary cyst
