Dental Anomalies 1

multiple keratin filled cysts derived from dental lamina; disappear spontaneously

cyst in upper lip, lateral to midline lined by respiratory epithelium

intraosseous cyst derived from epithelial remnants of nasopalatine duct; on radiograph, presents as a heartshaped radiolucency b/w roots of central incisors; can be confused w/ apical periodontal cyst (which are associated w/ dead teeth)

fissural cyst from epithelium entrapped furing fusion of palate; much less comon than and can be confused with nasopalatine cyst

derived from hair follicle; common in head/neck region; cyst lined by epidermis epithelium

occurs in mouth; derived from remnants of embryonic skin -> considered a "stripped down teratoma" i.e. has tissue derived from different germ layers; cyst lined by epidermis epithelium; cyst wall contains skin appendages

a simple form of dermoid cyst; contains no skin appendages

derived from developmental epithelial remnants of thyroglossal duct; soft movable swelling anywhere b/w thyroid gland and foramen cecum at base of tongue; mix of epithelial, thyroid, lymphoid and glandular tissue

yellow-white superifical nodule locaed where lymphoid tissue is present in mouth (post lateral tongue, tonsillar pillars, floor of mouth); lined by parakeratotic stratified squamous epithelium suffounded by lymhoid tissue

derived from developmental remants of branchial clefts in lateral neck, often along anterior border of SCM; lined by parakeratotic stratified squamous epithelium suffounded by lymhoid tissue; can include respiratory epith

asymmetry at birth; unilateral overgrowth of tongue, teeth and bones; associated w/ increased incidence of wilm's tumor (kidney tumor in children)

proressive atrophic (degenerative) changes affecting one side of face appearing during childhood

craniosynostosis; frog-like face e.g. hypertelorism (eyes far apart); mandibular prognathism; apert syndrom characterized by syndactyly of hands and feet

defective ossification -> midfacial and mandibular hypoplasia and low set ears; downward slanting of eyes; colobomas: notch on outer portion of eyelid; cleft palate is common

ingestion of excess fluoride; amelogenin retained in enamel -> hypomineralized enamel

caries/truama in primary tooth transmits inflammation to succeeding permanent tooth -> localized distubrance in matrix formation, calcification, shape and color

congenital syphils pts; hutchinson's incisor (screwdrive shaped w/ central notch); mulberry molars (lobulated occusal surface)

tooth-to-tooth contact causing wear; most common on incisal and occusal surfaces

caused by nonbacterial chemicals e.g. acidic drinks (anterior labial), vomitting (lingual surfaces)

caused by nonmasticatory friction e.g. brushing (buccal/labial), toothpicks (interproximal)

rare; begins from pulp chamber and extends outward; pink tooth of mummery: pulp chamber replaces w/ granulation tissue (inflammation)

common; begins at surface and extends inward by PDL cells; caused by local trauma, reimplanted avulsed teeth, orthodontics

avoid giving tetracycline to pregnant women or kids <9 y/o; minocycline can discolor adult permanent teeth by staining pulp

genetic disorder causing increased porphyrin synthesis -> porphyrin deposited in teeth -> red-brown discoloration

usu. limited to primary dentition; bilirubin broken down into biliverdin -> yellow-green staining; can be caused by erythroblastosis fetalis (Rh factor incompatibility -> hemolytic anemia) or biliary atresia

fusion of tooth to surrounding bone; possibly caused by periapical inflammation and subsequent bone repair; more common in primary teeth -> affects permanent successor eruption

oligodontia: missing more than 6 permanent teeth; andontia: missing all permanent teeth; extreme cases, evaluate pts for ectodermal dysplasia

tooth arising in newborn in first 30 days; mandibular incisors most common

incomplete division of a tooth into two

union of two separated tooth germs; count reveals a missing tooth

union of two adjacent teeth by cementum; can be developmental or due to inflammation

on surface of anterior tooth on cingulum -> occusal clearnace problem

dens en dente; invagination lined by enamel; coronal>radicular (root); predisposes tooth to decay and pulpitis -> prophylactic filling

accesory cusp present in central groove; relatively common; attrition/fracture of cusp can expose pulp; most common in premolars

ectopic enamel droplet in furcation or on root of molars

apical extensions of enamel past normallysmooth CEJ; PDL cant attach enamel -> prone to perio problems

elongated crown and apically placed furcation -> enlarged rectangular pulp chamber

excessive cementum deposits; generalized is very rare -> when present consider pagets bone disease; can lead to extraction problems

sharp bend in root

hereditary; mutated AMELX (amelogenin prot) and ENAM (enamelin) genes

reduced enamel thickness

enamel is normal thickness, but not of normal hardness and translucency; radiodensity similar to dentin

enamel is normal thickness but soft; radiodensity is less than dentin

distrbance in dentin formation caused by mutation in DSPP gene; opalescence in teeth of both dentition; not good crown candidates; 3 types

type I: OI+DI (mutation in COL1A1 and COL1A2 genes); type II: classical (blubous crowns, cervical constriction, loss of pulp and root canals; type III: bradywine isolate ("shell teeth"; very thin dentin and enlarged pulp; DSPP mutation)

hereditary defect in dentin formation affecting both primary and permanent dentitions; 2 types

crowns normal color; short roots and total obliteration of pulp canals; can have chevron shaped pulp or pulp stones; root dentin described as stream flowing around boulders; primary teeth wil always have periapical inflammation

associated w/ DI and also caused by DSPP mutation; primary DD: opalescent color, bulbous crowns w/ cervical constriction, obliteration of pulp (resembles DI); permanent: clinically normal crown, large coronal pulp w/ apical extension ("thistle tube"), almost always get pulp stones

affects local area; ghost teeth: thinly mineralized enamel and dentin; large pulp, short root w/ open apex; delayed/failed eruption