Acquired & Developmental Disturbances Flashcards
- What is “Concrescense”
- Which teeth are most affected?
- joined only by the cementum
- maxillary molars
p.42 A&M
What is the rate of occurence of cleft lip or palate
1 in 1000
p.39 A&M
why is tooth abscess from primary teeth is more concerning than permanent teeth?
drainage through the pulp chamber of a primary tooth is almost impossible if subperiosteal pus is present but permanent tooth is possible through pulp chamber with proper access
p.39 A&M
- What are the bacteria invovled in dental infection?
- What are the 2 broad categories?
- 2 categories = gram + facultative & gram - anaerobic
- Gram + Facul = streptococcus, staphylococcus, Actinomyces (SSA)
- Gram - anae = Prevotella, Treponema, Aggregatibacter, Fusobacterium (PTAF = pulp therapy as fuck)
p.41 A&M, Slide 130 of core curriculum read
what is the most affected area with “fusion”?
maxillary central and lateral incisors (most frequently affected teeth)
fusion = fewer teeth
gemination = normal counts
p.42 A&M
What is another name for geminatino?
Schizodontism
p.43 A&M
- What is another name for Dens Invaginatus?
- Which teeth are common?
- Dens in Dente
- Maxillary lateral incisor –> Maxillary canine –> other Mx molars
p.43 A&M
- What is hypophosphatasia?
- What does it cause?
- inherited metabolic disorder which is deficient in ALP (ALPL) enzyme (impaired mineralization of tooth and bone)
- premature exfoliation of the primary teeth (primary premature loss of anterior primary teeth associated with deficient cementum)
p.46 A&M
- What is hypophosphatemia? aka?
- what are clinical and dental manifestation?
- disorders of Vit D metaboilsm or action. X-linked
- Vit D deficient rickets
- Clinical = short stature + bowling of the lower legs in affected boys
- Dental = periapical radiolucency, abscesses due to abration of thin hypomineralized enamel which exposes pulp horn
- VDRR - 25% vit D resistant rickets were affected by abscess in primary teeth but prophylactic pulps aren’t recommended (only 44% success rate)
p.52 A&M
- What is another name for Cherubism?
- how is it inherited?
- how does it present?
- familial fibrous dysplasia
- autosomal dominant
- symmetric enlargement of the jaw that may be noted at early age. multilocular area of bone distruction (soap-bubble lesions)
- permanent teeth are usually ectopic and being displaced by the growing lesion.
- What is acrodynia?
- acrodynia or pink disease results from the exposure of young children to minute amounts of mercury. Pain and redness as extremities
- dental amalgam restoration do not cause acrodynia
- What are the stages of amelogenesis?
- enamel hypoplasia vs. hypocalcification
- Enamel matrix secretion by ameloblasts (apposition) –> calcification –> maturation
- enamel hypoplasia = issue with matrix secretion (stage 1)
- hypocalcification = issue with stage 2 or 3
p.56 A&M
what are characteristics of enamel hypoplasia vs. hypocalcification
- enamel hypoplasia = pitting of the enamel surface, developmental of horizontal lines
p.56 A&M
which vitamins deficiency causes enamel hypoplasia?
Vitamins A, C, D, Ca, Phosphorus
p.57 A&M
what is plumbism?
lead poisoning (it can cause enamel hypoplasia)
p.58 A&M
what is “turner tooth”
turner tooth is the name for the tooth that has enamel hypoplasia due to local infection (mostly premolars)
p.58 A&M
what are some causes of MIH?
- MIH = molar-incisor hypoplasia
- asthma, pneumonia, upper respiratory tract infection, otitis media, Abx use
p.62 A&M
- What gene mutation causes dentinogenesis imperfecta (DI)?
- what are type of DI?
- DSPP gene mutation (autosomal dominant)
- type 1 = associated with OI (syndomic)
- type 2 = non-syndromic, most common type
- type 3 = bradywine type (non-syndromic, rare)
p.64 A&M
what are treatment options for DI?
the placement of SSC on primary posterior teeth may be considered as a means of preventing gross abrasion of the tooth structure
p.65 A&M
- what is anodontia?
- what is oligodontia?
- what is hypodontia?
- anodontia = complete failure of the teeth to develop (super rare)
- oligodontia = missing more than 6
- hypodontia = missing less than 6
p.70 A&M
which genes are responsible for non-syndromic hypodontia?
WNT10A
p.70 A&M
- what are the most common teeth missing in permanent dentition?
- which teeth are commonly present in permanent dentition?
(most likely to least likely)
- 3rd molar –> Md 2nd premolar –> Mx lateral incisor –> Mx 2nd premolar
- Central incisors –> 1st perm molar –> canine
p.70 A&M
Regarding displaced canines:
- which gender is more common?
- which way commonly displaced in %?
- Female > male by 2-3x
- 85% = PDC - palatally dispalced canine
- 15% = laterally
p.71 A&M
Regarding ED (ectodermal dysplasia):
- what is hypotrichosis?
- what is hypohydrosis?
- what is asteatosis?
- hypotrichosis = sparse, absent hair growth
- hypohidrosis = difficulty cooling down, deficiency in sweat glands
- asteatosis = dry, cracked, scaly skin (often itchy)
p.72 A&M
what is consanguinity?
people has blood relation (1st cousins getting married)
p.73 A&M
what is “wiktop syndrome”?
it is type of ectodermal dysplasia (ED):
hypoplastic nails + hypodontia
p.74 A&M
